Secop SC10MNX Reciprocating Compressor: R290 Technical Data, Performance, Applications and Selection Guide

Summary. The Secop SC10MNX is a single-phase, fixed-speed, hermetic reciprocating compressor with 10.29 cm3 displacement on R290. Under ASHRAE medium back pressure conditions it delivers 766 W of cooling at 451 W input for a coefficient of performance of 1.70, and the manufacturer publishes six separate rating modes for this one code.

Key facts at a glance

What is the Secop SC10MNX?

The Secop SC10MNX is a hermetic reciprocating compressor built by Secop GmbH in Flensburg, Germany, and it belongs to the manufacturer's S-Series of fixed-speed machines for commercial refrigeration rather than to any air conditioning family. Its single piston displaces 10.29 cm3 per revolution, which is the smallest displacement the S-Series offers, it runs on a single-phase 220 to 240 V 50 Hz supply, and the manufacturer classes it as a medium back pressure machine on R290. The wider family is described on the manufacturer's S-Series product portfolio page, and the brand sits inside the Secop compressor group page on this site, which is itself part of the reciprocating compressor category.

This model deserves its own technical page for three reasons.

The first is documentation depth. Secop publishes a per-model technical data sheet for this exact code rather than only a catalogue row. The sheet carries the model number SC10MNX and the sales code 104H8075 in its header on all four pages, is stamped DB Sep 23, 2026, and contains a general data block, a compressor design block, an outline dimension table with connector geometry, a mounting accessory table, an electrical accessories block, an operating pressure range chart, a six-mode standard conditions table and two full performance tables. Everything numeric on this page that concerns the target model comes from that sheet, from the manufacturer's current catalogue, or from the manufacturer's R290 quick reference, and each table below names which source it used.

The second is refrigerant. R290 is propane, a natural refrigerant with a hundred-year global warming potential of less than one, which is why the manufacturer devotes a separate R290 and R600a quick reference to the codes that run on it. That choice carries a hard regulatory consequence, a charge limit of 150 g in the relevant appliance standards, which is treated in its own section below rather than as a footnote.

The third is that this is a compressor other people describe imprecisely, including this site. The product page for this model on this site states five fields and reproduces a block of boilerplate that does not describe this machine, and both of those are handled in a dedicated section rather than quietly corrected.

What does the model code SC10MNX mean?

The manufacturer publishes its identification key as a standalone bulletin, the key to compressor type designation, so the string can be decoded from the maker's own document rather than guessed. For fixed-speed compressors the key defines a design letter, a protector location, an optimisation level, then a compressor size, an application range, a refrigerant code letter and a code letter for starting characteristics.

Three of those blocks are worth a sentence each, because each one is routinely read the wrong way.

The X is not decoration. The designation key prints two code letters for starting characteristics and says explicitly that they cannot be used at the same time as specific conditions. It reads X as HST characteristics for an expansion valve and K as LST characteristics for a capillary tube, and it leaves the position blank for universal. This compressor carries X, which is consistent with the datasheet's statement that its starting torque is HST, and with the electrical block that gives it a relay plus an 80 uF start capacitor rather than a PTC device. A technician who fits a capillary tube to an X machine, or replaces the relay with a PTC starter, has changed the starting characteristic the manufacturer rated. The manufacturer's own R290 quick reference describes the LST to RSIR pairing as using a capillary tube with pressure equalising, and the HST to CSIR pairing as using a relay with a start capacitor, which is the pairing this code uses.

The MN block is an application range, not a displacement. The designation key's application range table lists MN as MBP and also lists CN as LBP/MBP, MF, MK and ML as MBP, C, CL, CM and CNL as LBP, and D, DL and DN as HBP. The model string carries MN, so the maker classes this machine for medium back pressure, and the datasheet repeats MBP in its application field. This matters commercially because the same 10.29 cm3 displacement also exists in the family as SC10CNX, whose CN block is a different application class on the same swept volume.

The 10 is a size class, not a rated capacity. The key prints displacement as a separate quantity to be read from the data sheet, and the datasheet gives the actual figure as 10.29 cm3. Sibling codes step that up in the same family: SC12MNX at 12.87 cm3, SC15MNX at 15.28 cm3 and SC18MNX at 17.69 cm3, against a published series range of 10.29 to 25 cm3. Reading 10 as a capacity figure of any kind would be wrong.

The suffix position carries no generation marker on this code. The designation key reserves .1, .2, .3 and .4 for updated first generation through fourth generation, and it reserves S for specific conditions. SC10MNX has nothing in that position, so it is a first-generation code. The sibling SC21CNX.2 carries the .2 marker and is a second-generation model, which is a real difference and not a cosmetic one.

What are the technical parameters of the SC10MNX?

Five of those rows deserve more than a table cell.

The displacement is the smallest the S-Series publishes. The manufacturer states the series range as 10.29 to 25 cm3 on the S-Series page, so every other fixed-speed S-Series code on R290 is larger. A designer choosing this code is choosing the floor of the range, and if the load grows the next step is more displacement rather than a higher rating from the same swept volume.

The 150 g charge limit is a technical limit printed on the datasheet, not a marketing preference. It is the ceiling the compressor is designed against, and it is set by the appliance safety standards rather than by the compressor. The section on the charge limit below explains what governs it.

The electrical block is unusually complete for a compressor of this size, and two of its numbers matter in service. The locked rotor current of 16.2 A and the cut in current of 16.2 A are the same number, which means the inrush and the cut-in are the same point on this machine. The rated load current of 3.1 A is small, and a technician who sizes a contactor or a cable against 16.2 A rather than against 3.1 A will over-specify; the honest reading is that 16.2 A is a starting transient and 3.1 A is the running figure. Note also that the datasheet records the run capacitor field as a dash pair, so this configuration takes no run capacitor at all.

The winding resistances are given to four significant figures, 5.100 Ohm main and 13.50 Ohm auxiliary, and with no tolerance band printed beside them, unlike some maker sheets that quote plus or minus five per cent. The ratio between them is roughly 2.6 to 1, which is normal for a CSIR machine and large enough that a technician can tell which pair is being measured rather than inferring it. The absence of a stated tolerance means a reading should be compared against a service tolerance from the maker rather than against the bare numbers.

The weight is published and that is worth noting, because this series of guides has met maker sheets that leave the weight field empty. At 13.10 kg the unit ships 80 to a pallet, which is a freight and handling figure rather than a technical one, but it is the figure a buyer needs for a container calculation and it is usually the first one missing.

At what conditions does Secop rate this compressor?

A cooling capacity figure without its rating point cannot be compared with anything, so the conditions come before the numbers here. Secop publishes six separate rating modes for this one code, and the manufacturer's designation key and catalogue set the three reference points that the modes are built on: LBP rated at -23.3 deg C evaporating and 54.4 deg C condensing, MBP rated at -6.7 deg C evaporating and 54.4 deg C condensing, and HBP rated at 7.2 deg C evaporating and 54.4 deg C condensing. The datasheet prints those reference points beside each mode, together with the return gas temperature and the liquid temperature, which is what makes the modes distinguishable rather than decorative.

Basis: manufacturer datasheet, standard conditions table, R290 at 220 V and 50 Hz, CSIR motor, fan at 3 m/s.

Three things about that table need to be said plainly.

The COP spread is real and it is not a defect. The same compressor shows 1.32, 1.38, 1.70, 1.71, 1.72 and 1.78 depending on which standard it is measured under, because the standards fix different condensing temperatures, different liquid temperatures and different return gas temperatures. The ARI540 MBP line and the ASHRAE MBP line share the same -6.7 deg C evaporating point but sit at 48.8 and 54.4 deg C condensing respectively, which is why they read 1.71 and 1.70 for capacities of 735 W and 766 W. Anyone quoting a single COP for this compressor is quoting one standard and silently discarding five.

The two lines with the same name are not the same point. The opt MBP line sits at -10 deg C evaporating and 45 deg C condensing and gives 715 W at COP 1.78, while the CECOMAF MBP line sits at -10 deg C evaporating and 55 deg C condensing and gives 593 W at COP 1.38. Both are medium back pressure modes and both evaporate at -10 deg C, so a comparison between them isolates the effect of the condensing temperature alone: ten kelvin of extra condensing temperature costs 122 W of capacity and 0.40 of COP on this machine.

The opt LBP line is a low back pressure rating on an MBP machine, and it is not the same point as the catalogue's LBP column. The datasheet rates opt LBP at -23.3 deg C evaporating and 45 deg C condensing for 406 W at COP 1.32. The catalogue's LBP column rates this code at -23.3 deg C evaporating and 54.4 deg C condensing for 351 W at COP 1.19. The evaporating temperatures match and the condensing temperatures do not, which is exactly why the two figures differ, and treating one as a substitute for the other would overstate low temperature capacity by about 16 per cent.

What do the manufacturer's two performance tables show?

The datasheet goes further than the six rated modes and publishes two full performance tables for this code, each sweeping the evaporating temperature from -23.3 to 7.2 deg C at a fixed condensing temperature. The first table holds condensing at 45 deg C with a liquid temperature of 45 deg C and a return gas temperature of 32 deg C. The second holds condensing at 55 deg C with a liquid temperature of 55 deg C and the same return gas temperature of 32 deg C. Reading the two side by side is the only way to see what the compressor does between the rated points, and it is also the only way to see the cost of a hot condensing condition across the whole envelope.

Table 1. Condensing 45 deg C, return gas 32 deg C, liquid 45 deg C.

Table 2. Condensing 55 deg C, return gas 32 deg C, liquid 55 deg C.

Basis for both tables: manufacturer datasheet, performance tables, R290 at 220 V and 50 Hz, CSIR motor, fan at 3 m/s.

Three readings follow from those two tables.

Capacity is far more sensitive to the condensing temperature than to anything else in the table. The two tables share the same eight evaporating temperatures, and at -10 deg C the difference is 715 W against 593 W, which is 122 W or about 17 per cent. At 0 deg C it is 1,074 W against 911 W, about 15 per cent. A designer who sizes this compressor from the 45 deg C table and then installs it behind a condenser that runs at 55 deg C in summer will be short of capacity by a sixth, and the input power will be higher at the same time, 430 W against 400 W at -10 deg C.

The current draw is conspicuously flat. Across the whole envelope of each table the current moves between 2.42 A and 2.91 A in the first table and between 2.43 A and 3.12 A in the second, against a rated load current of 3.1 A and a locked rotor current of 16.2 A. That is a useful service fact: this compressor does not draw dramatically more current at low evaporating temperature in the way a larger machine might, because the mass flow falls as the evaporating temperature falls and the two effects partly cancel. The flat current is not an accident of the table, it is the reason the RLA figure is published as a single number.

The end points of the two tables are not the rated modes and should not be read as such. Table 1 at -10 deg C reads 715 W at COP 1.78 and that is the opt MBP rating. Table 2 at -10 deg C reads 593 W at COP 1.38 and that is the CECOMAF MBP rating. But Table 1 at -23.3 deg C reads 364 W at COP 1.18, which is neither the opt LBP rating of 406 W at 1.32 nor the catalogue LBP figure of 351 W at 1.19, because Table 1 holds condensing at 45 deg C while the catalogue's LBP column uses 54.4 deg C and the opt LBP mode uses a different liquid temperature again. The three low temperature figures on this compressor, 364 W, 406 W and 351 W, are three different points and the guide keeps them apart everywhere.

What are the performance features that matter on this code?

Four features in the manufacturer documentation change what a system designer can do with the SC10MNX, and each one is a printed field rather than an inference.

High starting torque with a relay and a start capacitor. The datasheet prints the starting torque as HST and the starting device type as relay, with an 80 uF start capacitor and no run capacitor. The S-Series page explains the split: the LST to RSIR combination uses a capillary tube with pressure equalising and needs a five minute cooling period if a PTC device is used instead, while the HST to CSIR combination uses a relay with a start capacitor. On a machine that has to start against a pressure difference rather than from an equalised state, that is the configuration that permits it, and it is the reason a technician should not substitute a PTC starter on this code.

Internal motor protection. The datasheet prints motor protection as internal, so the protector sits inside the shell and cannot be swapped in the field. That is a planning fact: a tripped internal protector means the compressor has to cool before restart, and there is no external device to inspect or replace as part of a diagnosis. It also means the electrical accessory list is short, three items plus the cover.

Hot gas defrost and long interval pull down are both permitted. The datasheet prints OK against hot gas defrost and OK against long interval pull down. Commercial freezer cabinets commonly defrost by hot gas, and a compressor that is not cleared for it forces the designer into an electric or off-cycle defrost instead. Long interval pull down matters for the opposite case, a system that starts warm and takes a long time to reach set point, which is common on a cabinet that has been loaded with warm product.

A fan-cooled envelope with a wide ambient band. The system cooling field reads fan at 3 m/s, and the ambient band runs from 10 to 43 deg C with the machine room band running from 10 to 48 deg C. Those are wide bands for a small hermetic machine and they cover a tropical plant room rather than only a temperate one, but they are conditional on the 3 m/s airflow. A user who installs this compressor in a tight cabinet without that airflow is outside the published envelope regardless of what the room thermometer reads.

What is the operating envelope of the SC10MNX?

The datasheet publishes an operating pressure range chart alongside the performance tables, and the envelope it describes is bounded in three directions that each need to be respected.

The pressure chart distinguishes continuous operation from transitory operation, which is the detail most often lost when an envelope is copied. On the datasheet chart the continuous region is the narrower of the two and the transitory region extends beyond it, so a duty that sits in the transitory zone is permitted for excursion rather than for steady state. A designer who reads the outer boundary as the working envelope will size a system that spends its life in the transient band.

The discharge temperature limit of 130 deg C and the winding limit of 125 deg C are the two numbers that actually constrain an R290 application, because both are reached faster on a high compression ratio duty. On this machine the ratio between the highest and lowest charted points is large: at 55 deg C condensing and -23.3 deg C evaporating the compressor is moving heat across 78 kelvin and the COP at that point is 0.96, below unity. The performance table prints it, and it is a legitimate point on the chart, but it is a point at which the machine is consuming more electrical power than the cooling it delivers. Any application that would run continuously there should be re-examined rather than accepted because the table contains a number for it.

Where is the SC10MNX used?

The manufacturer classes this code as MBP, and the manufacturer's glossary for the MN block states that compressors with denominations ending with MN are designed for medium evaporating temperatures for use in commercial refrigerators, freezers and similar applications in regions with normal supply voltage. That is a broad statement and it is worth translating into the duty bands the published tables actually cover.

Two application notes belong with that table.

Hot gas defrost capability is what makes the frozen rows usable. The datasheet clears this compressor for hot gas defrost, so a small frozen display or a low temperature storage cabinet can defrost from the discharge side rather than by an electric element. Without that clearance the low temperature rows above would still be published, but the cabinet would need a different defrost strategy and the compressor would spend part of its life off.

The R290 charge limit is what bounds the physical size of the system, not the compressor. Because the appliance standards cap the charge at 150 g, and this compressor's own technical limit matches that figure, the practical ceiling on a single circuit is a cabinet, not a walk-in room. That is treated in the section below, and it is the single most important selection constraint on this code.

The 10.29 cm3 displacement also fixes the practical ceiling. Because this is the smallest S-Series displacement, the largest load in the table above, 1,074 W at 0 deg C evaporating, is close to the top of what this code will do under normal condensing, and everything above that belongs to a larger sibling. The comparison table below places this code against the rest of the R290 group, and reading it that way is the honest approach: this is the entry point of an R290 commercial range rather than a general purpose machine.

Why choose the SC10MNX?

Two of those advantages are stronger than they look, and one of them needs a qualification.

The three back pressure ratings from one code are the most commercially useful property here. The catalogue publishes this single row with an LBP column at 351 W and COP 1.19, an MBP column at 766 W and COP 1.70, and an HBP column at 1,329 W and COP 2.57. That means a distributor can carry one code number and cover a chilled cabinet and a frozen cabinet and a high back pressure application, provided each duty respects its own rating point and provided the 150 g charge limit is not exceeded. It also means the displacement alone does not tell a buyer what the compressor will do, which is why the rating mode has to be quoted with the capacity every time.

The wide ambient band is the second, and it matters most in the markets this compressor is sold into. A 10 to 48 deg C machine room band plus a 3 m/s fan requirement describes a compressor that will work in a tropical back of house as long as it is ventilated. Because the two figures are printed together on the same block of the datasheet, the condition is not separable from the allowance.

The qualification is about the network voltage. The datasheet prints the voltage range as 198 to 254 V against a nominal 220 to 240 V supply, which is the standard normal supply voltage band and the reason the MN glossary entry specifies regions with normal supply voltage. In a market where the nominal supply is 220 V and the real supply sags below 198 V under load, this compressor is outside its published range, and the correct response is a stabiliser or a different code rather than a lower evaporating temperature. The manufacturer publishes an explicit note that MN codes are for regions with normal supply voltage and that note should be read as a selection boundary rather than as a remark.

How does the SC10MNX compare with its siblings?

The manufacturer's current catalogue prints the whole S-Series R290 group across facing columns of one spread, so the comparison below is drawn from a single source and a single rating regime, which removes the risk of comparing rows from different documents.

Basis: manufacturer catalogue 06-2026, S-Series R290 group, with the LBP, MBP and HBP rating points defined on the same spread. The SC10MNX row was cross-checked against the same table in the 08-2021 edition of the catalogue, where it is byte-identical, and against the manufacturer's R290 quick reference 06-2026, which lists the same code and the same figures.

Four readings follow.

The step to SC12MNX is not worth making for a small gain. Displacement rises from 10.29 to 12.87 cm3, 25 per cent, but MBP capacity rises from 766 W to 995 W, 30 per cent, while the LBP COP actually falls from 1.19 to 1.13 and the housing grows from a 209 by 203 mm shell to a 219 by 213 mm one. A buyer who needs a little more capacity gets it, but the low temperature efficiency does not improve and the envelope grows.

The comparison that matters most is SC10MNX against SC10CNX, because they share the 10.29 cm3 displacement and the same 209 by 203 mm shell, and they differ in application class. SC10CNX is catalogued as L/MBP and rates 358 W at COP 1.27 on the LBP line and 711 W at COP 1.79 on the MBP line. SC10MNX rates 351 W at COP 1.19 on LBP and 766 W at COP 1.70 on MBP. So the MBP rating is 55 W higher on the MN code at a lower COP, and the LBP rating is 7 W lower at a lower COP. The two codes are close enough that the choice should be made on the published rating point the application actually sits at, not on the model name, and neither is a strict upgrade over the other.

The CNX.2 generation is a different proposition. The second-generation LBP codes are catalogued with LBP ratings only, 491 W at 12.87 cm3 up to 962 W at 20.95 cm3, and no MBP or HBP columns at all. A designer who needs one code to serve both a chilled and a frozen cabinet should look at the MN generation, and a designer who needs pure low temperature capacity should look at the CNX.2 generation. The SC21CNX.2 page on this site covers the top of that ladder.

SCE15CNLX is the interesting outlier. At 15.28 cm3 it rates 667 W at COP 1.52 on LBP, which is higher capacity than SC15MNX on the same displacement and a higher COP than SC10MNX on LBP, so the SCE generation is the efficiency-oriented line in this family. A buyer who needs low temperature capacity rather than medium temperature flexibility should compare SCE against SC directly rather than assuming the SC line is the only option, and the SCE15CNLX page on this site is the reference for that branch.

Is the SC10MNX affected by the S-Series phase-out?

This is a live question for this family and the answer has to be stated at the exact scope the manufacturer publishes, because the surrounding conversation is easy to overstate in both directions.

Secop issued a product bulletin dated 04.2025 with the reference DES.N.051.V1.02 announcing the discontinuation of the SC, SCE and SLV families from July 2025. The bulletin does not use a blanket phrase; it enumerates the affected code numbers, and the list includes entries such as 104H8169 for SC21CNX.2, 104L2196 for SCE18CLX.2 and 104L2603 for SLV12CLK.2. The code number for this compressor, 104H8075, is not on that list.

Two further checks were made on 30 September 2026 and both point the same way. The manufacturer's end-of-life page was searched for the model string SC10MNX, for the sales code 104H8075 and for the MNX suffix, and it returned no hit for any of the three. The current catalogue, published 06-2026, still carries the row, and it carries it with figures identical to the 08-2021 edition, so the code has not been quietly de-rated on the way towards withdrawal.

The accurate statement is therefore narrow and should be kept narrow: the S-Series platform as a whole is being phased out according to the manufacturer's own bulletin, with an enumerated list of affected codes and a July 2025 start date, and 104H8075 is not among the codes on that list and does not appear on the manufacturer's end-of-life page as of 30 September 2026. That is not the same as a guarantee of continuing supply. A bulletin can be extended, the catalogue edition that still contains the row is a 06-2026 document, and a buyer placing a production order for delivery in a later year should confirm availability with the supplier rather than rely on the current catalogue. The distinction between not listed yet and guaranteed is the one that matters, and this guide does not present the model as unaffected by any phase-out.

What is the refrigerant charge limit and what governs it?

R290 is a flammable refrigerant and that is the reason a charge limit exists at all. The limit printed on the datasheet is 150 g, and it is reproduced in the appliance safety standards that govern the equipment this compressor goes into.

Three consequences follow, and the first is the one that decides system architecture.

Because the charge is capped at 150 g and this compressor's own technical limit is the same number, the size of a single R290 circuit is bounded by how much refrigerant the evaporator and condenser hold at that charge. In practice that means a display cabinet, a counter, an ice machine or a small reach-in, not a walk-in room and not a condensing unit serving a distributed circuit. A buyer who needs a large cold room has to solve it with multiple small R290 circuits or with a different refrigerant, regardless of how much capacity the tables above show.

The compressor's technical limit is not the same thing as the appliance limit, even when the numbers match. The datasheet prints 150 g as the compressor's technical limit, which is the charge the compressor itself is designed to tolerate in its circuit. The standard sets the appliance limit from a concentration calculation based on the room volume and the refrigerant's flammability, and on a small room the standard's number can be lower than the compressor's. Reading the datasheet figure as permission to charge 150 g into any installation reverses the direction of the constraint.

Purity is part of the charge specification, not a detail of it. The manufacturer requires 97 per cent purity or better with impurities limited by DIN 8960 of 1998 and the extended ISO 916 method, and states that fuel grade propane must not be used. Fuel grade propane is cheaper, is available in the same cylinders and looks the same to a technician, which is why the restriction is worth repeating here rather than leaving it in a document. A charge of fuel grade propane puts sulphur and other impurities into a POE oil system, and POE is hygroscopic and does not tolerate contamination.

What standards, approvals and certification apply?

The datasheet prints three approvals against the configuration it describes, and the wider standards framework is what fixes the rating points the tables above use.

Two qualifications belong with that table, and both are about the difference between a declaration and a certificate held by this compressor.

The three approvals are printed on the datasheet for this configuration, which is stronger evidence than a company page, but they are declarations about the code rather than documents this guide has sighted. No individual approval certificate for 104H8075 was retrieved while this guide was written, and none is claimed here. A buyer who needs the certificate for a filing should request it from the supplier against the exact sales code.

The VDE entry in particular should be read carefully. VDE publishes registers of products carrying its mark, and the manufacturer's datasheet declares VDE among the approvals for this code, but the mark register that would confirm the individual listing was not reachable while this guide was written: the automated request to that register returned HTTP 404 on 30 September 2026, and requests to the certification records at the IECEE and ISO addresses returned HTTP 403 in the same round. The declaration is reported because the manufacturer prints it, and the confirmation is reported as not obtained. The distinction matters most in the German market, where the mark is a commercial argument rather than only a compliance document.

What should a buyer check before ordering the SC10MNX?

Nine checks cover the gap between the published tables and a working order. Each one is here because a source used to write this guide either leaves it open or states it in a way that is easy to carry across incorrectly.

1. Confirm the rating point, in writing. The same code is published at 351 W and COP 1.19 on LBP at -23.3 / 54.4 deg C, at 766 W and COP 1.70 on ASHRAE MBP at -6.7 / 54.4 deg C, and at 1,329 W and COP 2.57 on HBP at 7.2 / 54.4 deg C. A purchase order that says 766 W without saying which rating mode it came from cannot be checked against the delivered machine.

1. Confirm availability against the phase-out bulletin by sales code. Ask specifically about 104H8075, not about the SC family, because the bulletin operates on an enumerated list of code numbers and the family name alone is not the unit of withdrawal.

1. Confirm the charge limit for the actual installation, not the datasheet limit. The datasheet prints 150 g as the compressor's technical limit; the appliance standard computes the limit from the room volume and the refrigerant flammability and can be lower in a small room. The system charge needs to satisfy the appliance figure.

1. Confirm the electrical configuration physically. The datasheet specifies CSIR with HST starting torque, a relay starting device and an 80 uF start capacitor, with the run capacitor field printed as a dash pair. A delivered unit fitted with a PTC starter is not the configuration the maker rated, and the S-Series documentation explains that the PTC alternative is the LST route with a capillary tube and a pressure equalising period.

1. Confirm the voltage situation at site. The published voltage range is 198 to 254 V on a 220 to 240 V nominal, and the manufacturer states that MN codes are for regions with normal supply voltage. Measure the site rather than assume the nominal.

1. Confirm the airflow. The ambient band of 10 to 43 deg C and the machine room band of 10 to 48 deg C are published alongside a system cooling requirement of a fan at 3 m/s. The temperature allowance and the airflow requirement are on the same block and are not separable.

1. Confirm the mounting bracket part number. The datasheet publishes four bracket options with different joint types and diameters, 118-1917 and 118-1918 for an M6 bolt joint at 16 mm, 118-1946 for a quarter inch bolt joint at 16 mm, 118-1949 for a quarter inch bolt joint at 19 mm and 118-1947 and 118-1919 for a snap-on at 7.3 mm. Two of those pairs differ only in whether they are packed for one compressor or for a multi pack, which is easy to mistype on an order.

1. Confirm the connector orientation from the drawing, not from a description. The suction connector sits at a horizontal angle of 37 deg and a vertical angle of 30 deg, the discharge at 37 deg and 0 deg, and the process at 143 deg and 150 deg, all plus or minus 2 deg, with a 12 mm straight tube at each position. A piper who assumes a standard orientation will find the discharge pointing somewhere unexpected.

1. Confirm the oil and the refrigerant specification. The compressor ships with POE at 22 cSt viscosity, and the manufacturer requires R290 of 97 per cent purity or better with impurities inside DIN 8960 of 1998 as extended by ISO 916, explicitly prohibiting fuel grade propane.

What do this site's own pages say, and where do they disagree with the manufacturer?

The product page for this model on this site is the page this guide is the body of, so its content needs to be read honestly rather than treated as neutral background. On 30 September 2026 that page carried a product description block, a key features block and five specification fields, and three of those need a note.

The five specification fields read Model SC10MNX, Voltage 220V,50HZ, Capacity 352W, Refrigeration R290 and Back pressure Middle/High. The capacity figure is an LBP class number carrying an MBP label. The manufacturer's MBP figure for this code is 766 W at -6.7 / 54.4 deg C, and its LBP figure is 351 W at -23.3 / 54.4 deg C. The 352 W on the page is within one watt of the manufacturer's LBP figure and roughly 54 per cent below the manufacturer's MBP figure, so the number and the label describe two different rating points. The sibling SC15CNX.2 page on this site shows that the site does carry the distinction when it intends to: that page prints Capacity 625W with Back pressure Low, and the manufacturer's LBP figure for SC15CNX.2 is 624 W at -23.3 / 54.4 deg C, so the figure and the label agree there. On the SC10MNX page they do not. Until the label is corrected, a buyer reading this site should treat 352 W as a low back pressure class figure and take the medium back pressure figure from the manufacturer's datasheet.

The key features block claims innovative IDV technology that further enhances part-load efficiency. That claim cannot apply to this compressor. IDV is a variable displacement mechanism, and the SC10MNX is a fixed-speed machine by the manufacturer's own classification, catalogued in the catalogue's fixed-speed compressor section and documented with a fixed-speed designation key. No manufacturer document retrieved while this guide was written mentions IDV in connection with this code or with the SC family, and the datasheet describes a fixed displacement of 10.29 cm3 with no part-load mechanism at all. Part-load efficiency on this machine comes from cycling, from the envelope position, and from the condensing temperature, not from a displacement control. The sentence is a copy defect and is recorded here as one rather than repeated as a product fact.

The product description block is family boilerplate rather than a description of this machine. It states that Secop reciprocating compressors support system design for the use of alternative refrigerants for light commercial, commercial and industrial HVAC applications such as rooftops units, chillers, process cooling and packaged units, and the same two blocks appear verbatim on the SC15CNX.2 page and elsewhere in the Secop range on this site. Rooftop units, chillers and packaged units are air conditioning equipment, and this compressor is not catalogued for them: it is an R290 medium back pressure machine with a 150 g charge limit, a 10.29 cm3 displacement and a published envelope that tops out at 1,394 W. Repeating that block as though it described this model would put the wrong application category in front of a buyer, and it is recorded here as boilerplate rather than as a product claim.

One further difference is worth stating, because it is an absence rather than a disagreement. The manufacturer publishes a weight of 13.10 kg, a displacement of 10.29 cm3, a voltage range of 198 to 254 V, electrical data including 16.2 A locked rotor and 3.1 A rated load, an ambient band, a charge limit, an oil specification, a dimension table and an accessory list for this code. The page on this site carries none of those. That is the gap this guide exists to fill, and every figure in it comes from the documents listed in the sources below rather than from the site's own product fields.

Frequently asked questions

Is the SC10MNX a variable speed compressor?

No. It is a fixed-speed machine. The manufacturer catalogues it in the fixed-speed compressor section of the current catalogue under a designation key written for fixed-speed families, and the datasheet gives a single fixed displacement of 10.29 cm3 with no variable displacement mechanism. The part-load efficiency claim on this site's own page for the model, which attributes part-load gains to IDV technology, does not apply to this code.

What is the difference between SC10MNX and SC10CNX?

They share the same 10.29 cm3 displacement and the same 209 by 203 mm housing, and they differ in application class. The catalogue prints SC10MNX as MBP, with an MBP rating of 766 W at COP 1.70 and an LBP rating of 351 W at COP 1.19, and it prints SC10CNX as L/MBP, with an MBP rating of 711 W at COP 1.79 and an LBP rating of 358 W at COP 1.27. Neither strictly dominates the other, and the choice should follow the rating point the application actually sits at.

What does the 104H8075 number mean?

It is the sales code for this compressor, printed in the header of all four pages of the datasheet next to the model string SC10MNX, and it is the number the catalogue uses in the same column. It is also the number to quote when asking about the phase-out bulletin, because the bulletin's list is written in sales codes rather than in model names.

Can the SC10MNX run at -23.3 deg C evaporating?

It can, and the manufacturer publishes three different figures for that point depending on the condensing and liquid conditions. The catalogue LBP column gives 351 W at COP 1.19 at -23.3 / 54.4 deg C. The datasheet's opt LBP mode gives 406 W at COP 1.32 at -23.3 / 45 deg C. The first performance table, which holds 45 deg C condensing with a 45 deg C liquid temperature, gives 364 W at COP 1.18 at -23.3 deg C. All three are legitimate published points and none of them substitutes for another.

Does this compressor need a run capacitor?

No. The datasheet prints the run capacitor field as a dash pair and lists only a relay, an 80 uF start capacitor, a cord relief and a plastic cover among the electrical components, with an alternative cover part number. This is the HST to CSIR configuration the manufacturer describes as relay plus start capacitor.

What oil does it use?

POE, a polyol ester oil, at 22 cSt viscosity. The datasheet prints the quantity as 500 with the conversion 16.91 fl.oz and no unit word after the 500, and it is reproduced here as printed. POE is hygroscopic, so the refrigerant purity specification and the prohibition on fuel grade propane are oil protection requirements as much as refrigerant requirements.

How much refrigerant does the system take?

The compressor's technical limit is 150 g, printed on the datasheet alongside the conversion 5.29 oz. The appliance limit comes from the applicable safety standard and is calculated from the room volume and the flammability classification of R290, so it can be lower than the compressor figure on a small installation. The two numbers are not interchangeable.

Is the SC10MNX still in production?

It is not on the manufacturer's phase-out list as of 30 September 2026, and the current 06-2026 catalogue still carries its row with figures identical to the 08-2021 edition. The manufacturer's bulletin DES.N.051.V1.02 of 04.2025 discontinues the SC, SCE and SLV families from July 2025 and enumerates the affected sales codes, and 104H8075 does not appear in that enumeration, while the sibling SC21CNX.2 does appear there under code 104H8169. That is the present state and not a forward guarantee, so availability should be confirmed against the sales code before a production commitment.

What is the smallest displacement in the S-Series?

10.29 cm3, which is this code. The manufacturer publishes the S-Series range as 10.29 to 25 cm3, so every other fixed-speed S-Series code is larger, starting with SC12MNX at 12.87 cm3. The same swept volume also exists as SC10CNX in a different application class.

Is the SC10MNX suitable for a walk-in cold room?

Not as a single R290 circuit. The binding constraint is the charge limit rather than the capacity: IEC 60335-2-89 caps the charge at a figure the compressor's own technical limit also stands at, 150 g, which bounds how much refrigerant the circuit can hold and therefore the physical size of the evaporator and condenser. Multiple small circuits or a different refrigerant is the route to a larger room. The capacity tables do show 1,074 W at 0 deg C evaporating and 45 deg C condensing, but capacity is not the limiting factor here.

How many compressors come on a pallet?

1. The datasheet publishes the pallet quantity as a field in its own right, next to a weight of 13.10 kg per unit, which gives a pallet of roughly 1,048 kg of product.

What does the X at the end of the model number mean?

It is the code letter for starting characteristics, and the manufacturer's designation key reads X as HST characteristics for an expansion valve, against K for LST characteristics with a capillary tube and a blank for universal. The key states that the code letters cannot be used at the same time as specific conditions, so the X is a real constraint on how the machine may be started rather than a decorative suffix.

Sources

1. Secop technical data sheet, SC10MNX, sales code 104H8075, R290, 220-240 V 50 Hz, DB Sep 23, 2026, four pages, hosted by the manufacturer: sc10mnx_104h8075_r290_220v_50hz_09-2026_ds.pdf
2. Secop product catalogue, AC voltage compressors, edition 06-2026, S-Series R290 group on page 16, hosted by the manufacturer: ac_voltage_compressors_06-2026_desk490d402.pdf
3. Secop quick reference, compressors for R600a and R290, edition 06-2026, SC10MNX on page 4, hosted by the manufacturer: compressors_for_r600a_r290_06-2026_desb050l602.pdf
4. Secop product bulletin, key to compressor type designation, 06-2025, fixed-speed designation key, application range table and starting characteristics letters: key_to_compressor_type_designation_06-2025_desi050a902.pdf
5. Secop product bulletin, phase-out SC, SCE and SLV, 04.2025, reference DES.N.051.V1.02: phase-out_sc-sce-slv_04-2025_desn051v102.pdf
6. Secop product bulletin, date code, type label and country of origin, 08-2026: date_code_type_label_country_of_origin_08-2026_desn000g802.pdf
7. Secop S-Series product portfolio page, series range, refrigerants and the LST to RSIR and HST to CSIR starting combinations: secop.com/products/product-portfolio/s-series
8. Secop product portfolio index, used to establish that the S-Series is a fixed-speed family: secop.com/products/product-portfolio
9. Secop certificates and declarations page, company level quality, environmental and conformity documents: secop.com/products/certificates-declarations
10. Secop end-of-life page, searched on 30 September 2026 for SC10MNX, 104H8075 and the MNX suffix, with no hit returned: secop.com/updates/end-of-life-eol
11. Secop technical literature index, used to locate the current catalogue, quick reference and product bulletin editions: secop.com/products/technical-literature
12. Secop latest product bulletins index, used to resolve the current bulletin addresses: secop.com/updates/latest-product-bulletins
13. Cross-version check of the same catalogue row, AC voltage compressors edition 08-2021, SC10MNX on page 32, hosted on a third-party mirror rather than by the manufacturer: refindustry.com, ac_voltage_compressors_08-2021_desk490a902.pdf
14. IEC 60335-2-89, household and similar electrical appliances, particular requirements for commercial refrigerating appliances with an incorporated or remote refrigerant unit or compressor, the standard that caps the R290 charge: webstore.iec.ch/en/publication/62243
15. IEC 60335-2-34, household and similar electrical appliances, particular requirements for motor compressors: webstore.iec.ch/en/publication/80533
16. AHRI, publisher of the ARI 540 positive displacement refrigerant compressor performance rating standard named by the datasheet's ARI540 rating mode: ahrinet.org
17. ASHRAE, publisher of Standard 34 on the designation and safety classification of refrigerants, used for the R290 flammable classification: ashrae.org
18. Intergovernmental Panel on Climate Change, Sixth Assessment Report, Working Group 1, Chapter 7, used for the hundred year global warming potentials quoted in this guide: ipcc.ch/report/ar6/wg1
19. International Energy Agency, The Future of Cooling, used for the context on refrigeration demand growth: iea.org/reports/the-future-of-cooling
20. Food and Agriculture Organization of the United Nations, report on the cold chain, used for the context on refrigeration in food supply: fao.org, cc0923en.pdf
21. ATMO, the refrigeration industry body publishing on natural refrigerant uptake: atmo.org
22. VDE, the German electrotechnical certification body named in the datasheet approvals field: vde.com
23. This model's own page on this site, the page this guide is the body of: Secop reciprocating compressor SC10MNX on qishanrcompressor.com
24. The Secop compressor group page on this site, which is the group the breadcrumb points at: Secop compressor range on qishanrcompressor.com
25. The reciprocating compressor category page on this site: reciprocating compressor category on qishanrcompressor.com
26. Sibling model pages on this site used in the decode, comparison and site-defect sections: SC12MNX, SC15MNX, SC18MNX, SC21CNX.2, SC10CNX, SCE15CNLX and SC15CNX.2
27. Other Secop codes on this site, listed as adjacent rows rather than as data for this model: TL5G, SC10G, SC15MFX, NLE11CNL and DLE7.5CN
28. Secop article-style pages on this site, listed as the only non-catalogue Secop content the site carries: Secop GS34CLX reciprocating compressor, Secop NLE12.6MN piston refrigeration compressor and Secop NLV12.6CN medium and low back pressure compressor
29. Site pages used for navigation and product context: the product index, the HVACR hub, the Secop brand page, the news index and the download page

All external links in the list above were probed for HTTP 200 on 30 September 2026 except where a note in the body records a different result, and no address appears in this article that was not either retrieved successfully or explicitly described as inaccessible with the response it returned.