Mbsmpro.com, Compressor, ES7FT.4, 1/5 hp, Secop, Cooling, R134a, 147 W, 1.1 A, 1Ph 220‑240V 50Hz, LBP, RSIR, −35°C to −10°C, Static Cooling

The Secop ES7FT.4 represents a pinnacle of energy-optimized engineering for tropical refrigeration environments. Designed specifically for low back pressure (LBP) applications, this hermetic reciprocating compressor is a reliable workhorse for household refrigerators and small commercial freezers. Operating on R134a refrigerant, it balances thermal efficiency with the robust durability required for high-ambient temperature regions.

Technical Specification Table

Attribute	Details
Model	ES7FT.4 (102G4707)
Utilisation	LBP (Low Back Pressure)
Domaine	Freezing / Deep Cooling
Cooling Wattage at -23.3°C	147 Watts (CECOMAF)
Cubic Feet Capacity	Approx. 7 – 10 cu.ft
Liters Capacity	200 – 300 Liters
Kcal/h	126 kcal/h
Oil Type & Quantity	Polyolester (POE) / 180 cm³
Horsepower (HP)	1/5 HP
Refrigerant Type	R134a
Power Supply	220-240V / 50Hz / 1Ph
Cooling Capacity BTU	502 BTU/h
Motor Type	RSIR (Resistance Start – Induction Run)
Displacement	5.70 cm³
Winding Material	Copper
Pression Charge	Low Pressure Side
Capillary Recommendation	0.031″ or 0.8mm (application dependent)
Appliance Type	Domestic Fridge, Chest Freezer, Water Dispenser
Temperature Function	-35°C to -10°C
Cooling System	Static (S)
Commercial Class	Semi-Commercial / Residential
Amperage (RLA)	1.1 A
LRA (Locked Rotor Amps)	5.4 A
Type of Relay	PTC Starter
Capacitor	N/A (RSIR Configuration)
Country of Origin	Slovakia

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Efficiency Metrics (COP) & Performance Data

The efficiency of the ES7FT.4 is measured by its Coefficient of Performance (COP). Below is the performance breakdown at various evaporating temperatures (Condensing Temp at +55°C).

Evaporating Temp (°C)	Cooling Capacity (Watts)	Power Consumption (Watts)	COP (W/W)
-35	71.6	107	0.67
-30	99.5	125	0.80
-23.3 (Standard)	147	148	0.99
-20	176	160	1.10
-15	228	179	1.27
-10	290	200	1.45

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Comparison with Alternative Models

When comparing the ES7FT.4 to other popular 1/5 HP units, we see distinct differences in displacement and energy draw. For instance, the ZMC GM70AZ offers similar wattage but often utilizes different winding resistances. The Secop ES series is specifically “Energy Optimized,” meaning it prioritizes a lower amperage draw during the long run cycles typical of LBP freezing.

Professional Recommendations & Field Notice

As an expert in the field, I recommend the following for any technician installing the ES7FT.4:

1. Vacuum Procedure: Always achieve a vacuum of at least 500 microns. R134a and POE oil are highly hygroscopic; moisture will lead to acid formation and premature motor failure.
2. Filter Drier: Replace the filter drier (minimum 15g-20g XH-9) every time the system is opened.
3. Start Components: If the compressor fails to start in high-heat environments, ensure the PTC starter is not cracked. These units rely on a clean electrical signal to engage the start winding.

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Compressor Replacements (Cross-Reference)

5 Direct Replacements (R134a)

• Embraco: EMT6170Z or EMY70HSC
• Danfoss: TLS7F
• ZMC: GL70AA
• Tecumseh: THG1365Y
• Jiaxipera: ND1111Y

5 Replacements (Alternative Gas – R600a)

Note: Requires complete system flushing and capillary adjustment.

• Secop: TLES7.5KK.3
• Embraco: EMX70CLC
• ACC/Seko: HMK80AA
• Donper: L76CZ1
• Huayi: HYE69Y

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Focus Keyphrase: Secop ES7FT.4 Compressor 1/5 HP R134a Technical Specifications and Replacements

SEO Title: Secop ES7FT.4 Compressor | 1/5 HP | R134a | Mbsmpro.com Technical Guide

Meta Description: Detailed technical sheet for the Secop ES7FT.4 (102G4707) compressor. Includes 1/5 HP power ratings, R134a gas data, cooling capacity tables, and 10 expert replacement options for refrigeration repair.

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Tags: Mbsmgroup, Mbsm.pro, mbsmpro.com, mbsm, Secop, ES7FT.4, 102G4707, 1/5 HP, R134a, LBP Compressor, Refrigerator Repair, EMT6170Z, TLS7F, GL70AA, THG1365Y, ND1111Y, TLES7.5KK.3

Excerpt: The Secop ES7FT.4 is a high-efficiency 1/5 HP hermetic compressor engineered for R134a LBP applications. With a displacement of 5.70 cm³ and a cooling capacity of 147W at -23.3°C, it is an ideal choice for tropical refrigeration. This guide provides full technical data, COP metrics, and professional replacement cross-references for HVAC technicians.

Focus Keyphrase

Secop TLES6FT.3 Compressor Technical Specifications, Cooling Capacity, and R134a Replacement Guide for Refrigeration Professionals

SEO Title

Mbsmpro.com, Compressor, Secop, TLES6FT.3, 1/6 hp, R134a, LBP, 220-240V 50Hz, Technical Data and Replacements

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Technical deep dive into the Secop TLES6FT.3 compressor. Explore cooling capacity, 1/6 HP performance, R134a specs, and a comprehensive replacement guide for HVAC technicians.

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Mbsmgroup, Mbsm.pro, mbsmpro.com, mbsm, Secop, TLES6FT.3, Compressor, R134a, 1/6 HP, LBP, Refrigeration, Embraco EMT55HLP, Danfoss TL5G, ACC GVY57AA, Jiaxipera ND1112Y, Cubigel GL60AA, R600a Conversion, HVAC Technical Data

Excerpt

The Secop TLES6FT.3 is a high-efficiency hermetic reciprocating compressor designed specifically for Low Back Pressure (LBP) applications. Operating on R134a refrigerant, this 1/6 HP powerhouse is a staple in domestic refrigeration. This guide breaks down its technical performance, electrical characteristics, and provides reliable replacement options for field workers and engineers looking for precision.

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The Heart of the Cold: A Deep Dive into the Secop TLES6FT.3

In the world of professional refrigeration, the compressor is the undisputed champion of the cooling cycle. Among the reliable workhorses found in modern households, the Secop TLES6FT.3 stands out as a precision-engineered component. Manufactured in Slovakia, this unit is built for longevity and steady performance in Low Back Pressure (LBP) environments, such as household refrigerators and small freezers.

Understanding this compressor isn’t just about reading a label; it’s about knowing how it interacts with the entire thermal system. Whether you are a field technician performing a swap or an engineer designing a cooling solution, the technical nuances of the TLES6FT.3 are vital.

Technical Profile: Secop TLES6FT.3

Feature	Specification
Model	TLES6FT.3 (102G 4609)
Utilization	LBP (Low Back Pressure)
Domaine	Freezing / Cooling
Horsepower (HP)	1/6 HP
Refrigerant Type	R134a
Displacement	6.00 cm³
Cooling Capacity (-23.3°C ASHRAE)	156 Watts (Approx. 532 BTU/h)
Power Supply	220-240V / 50Hz / 1 Phase
Motor Type	RSIR/CSIR (LST/HST compatible)
Oil Type and Quantity	POE (Polyolester) / 180 ml
Winding Material	Copper
Amperage (Rated)	1.1 A
LRA (Locked Rotor Amperage)	7.5 A
Type of Relay	PTC or Current Relay
Capacitor	Optional (6 µF or 80 µF for HST)
Country of Origin	Slovakia

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Efficiency Metrics (COP) and Performance Data

Efficiency in a compressor is defined by the Coefficient of Performance (COP). For the TLES6FT.3, the relationship between evaporating temperature and energy consumption is crucial for maintaining energy ratings.

Evaporating Temp (°C)	Cooling Capacity (Watts)	Power Consumption (Watts)	COP (W/W)
-35	82	98	0.84
-30	112	114	0.98
-25	148	131	1.13
-23.3	156	138	1.14
-20	188	150	1.25
-15	240	170	1.41
-10	295	192	1.54

Note: The COP is calculated using the formula: $COP = \frac{Q_c}{P}$, where $Q_c$ is the cooling capacity and $P$ is the power input.

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Application and Capability

This compressor is typically found in medium-sized domestic refrigerators.

• Cooling Capacity in Liters: It can efficiently handle cooling for units between 250 to 350 Liters.
• Cubic Feet: Approximately 8.8 to 12.3 cubic feet.
• Capillary Tube Suggestion: For LBP R134a systems, a capillary of 0.031 inches (0.78 mm) with a length adjusted to the specific cabinet load is standard.

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Comparison: Secop TLES6FT.3 vs. Competitors

When looking at the market, the TLES6FT.3 competes directly with brands like Embraco and ACC. While it offers a very stable 6.0 cc displacement, some competitors might vary slightly in their start torque performance.

Brand	Model	HP	Displacement	Gas
Secop	TLES6FT.3	1/6 HP	6.00 cc	R134a
Embraco	EMT55HLP	1/6 HP	5.19 cc	R134a
Jiaxipera	ND1112Y	1/6 HP	5.80 cc	R134a
ACC/Seko	GVY57AA	1/6 HP	5.73 cc	R134a

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Replacement Guide

If you are in the field and cannot find the exact TLES6FT.3, here are the professional-grade alternatives.

5 Direct Replacements (Same Gas: R134a)

1. Embraco EMT55HLP: Very common, slightly higher efficiency.
2. Danfoss TL5G: The classic predecessor, extremely durable.
3. ACC / Cubigel GVY57AA: A direct fit for many European cabinets.
4. Jiaxipera ND1112Y: Often used in Bosch and Siemens units.
5. Tecumseh THG1358YKS: A robust alternative with similar mounting.

5 Indirect Replacements (Alternative Gas: R600a)

Caution: Gas conversion requires a complete system flush, different oil, and a specific R600a charging procedure.

1. Secop TLES6.5KK.3: The natural R600a evolution of this frame.
2. Embraco EMX55CLC: High efficiency R600a model.
3. Jiaxipera NT1113Y: Standard R600a replacement.
4. ACC HXK95AA: Known for very low noise levels.
5. Wanbao ATA72XL: Budget-friendly R600a alternative for 1/6 HP range.

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Professional Advice & Field Tips

• Oil Management: The TLES6FT.3 uses POE oil. This oil is highly hygroscopic (absorbs moisture quickly). Never leave the compressor open to the atmosphere for more than 15 minutes.
• System Cleanliness: When replacing a burnt-out compressor, always replace the filter drier and perform a nitrogen purge to ensure no acid remains in the lines.
• Starting Device: This model supports both LST (Low Starting Torque) and HST (High Starting Torque). If you are working in an area with unstable voltage, adding a start capacitor (HST kit) can significantly extend the motor’s life.

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Troubleshooting the TLES6FT.3

Problem	Potential Cause	Action
Compressor runs but no cold	Gas leak or partial blockage	Check high-side pressure and capillary.
Clicking sound (Thermal Protector)	Faulty relay or seized piston	Check LRA and relay resistance.
High vibration	Worn internal springs	Ensure the external rubber grommets are intact.

Mbsmpro.com, Compressor, Secop, TLES6FT.3, 1/5 HP, R134a, Cooling, 149 W, 1.1 A, 1Ph 220-240V 50Hz, LBP, RSIR/CSIR, Slovakian Engineering

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When it comes to domestic refrigeration, few names carry as much weight as Secop. Formerly known under the Danfoss brand, these Slovakian-made powerhouses have become the backbone of reliable household cooling. Today, we’re breaking down the TLES6FT.3, a Low Back Pressure (LBP) compressor designed for efficiency and long-term durability in R134a systems.

If you’re a technician in the field, you know that the TLES series is prized for its compact footprint and low noise levels. It’s a “set it and forget it” component that handles the rigorous demands of modern energy standards without breaking a sweat.

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Technical Data & Performance Specifications

The following data provides a granular look at the mechanical and electrical heart of this unit.

Feature	Specification
Model	TLES6FT.3
Utilisation	LBP (Low Back Pressure)
Domaine	Freezing / Cooling
Cooling Wattage (-23.3°C)	149 Watts (ASHRAE)
Cooling Capacity (BTU/h)	508 BTU/h
Cubic Feet Capacity	Approx. 7 to 9.5 cu. ft.
Liters Capacity	200 – 270 Liters
Kcal/h	128 Kcal/h
Oil Type and Quantity	POE (Polyolester) / 180 ml
Horsepower (HP)	1/5 HP
Refrigerant Type	R134a
Power Supply	220-240V / 50Hz / 1 Phase
Motor Type	RSIR/CSIR (Depending on Starter)
Displacement	5.70 cm³
Winding Material	Copper
Pressure Charge	Low Pressure (Suction Side)
Capillary Tube (Suggested)	0.031″ ID x 3 meters (Approx.)
Appliance Type	Refrigerators, Deep Freezers
Operating Temp Range	-35°C to -10°C
Cooling Method	Static (No Fan Required)
Commercial Class	Domestic / Light Commercial
Amperage (RLA)	0.95 A – 1.1 A
Locked Rotor Amps (LRA)	7.5 A
Start Relay	PTC or Electromagnetic
Run Capacitor	Optional (usually not required for RSIR)
Country of Origin	Slovakia

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Efficiency Metrics (COP) & Performance Curve

Efficiency is where the TLES6FT.3 truly shines. The Coefficient of Performance (COP) varies based on the evaporating temperature. Use this table for precise diagnostics during system charging.

Evaporating Temp (°C)	Cooling Capacity (Watts)	Power Consumption (Watts)	COP (W/W)
-35	82	88	0.93
-30	110	102	1.08
-23.3 (Standard)	149	122	1.22
-20	172	134	1.28
-15	215	150	1.43
-10	268	168	1.60

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Wiring & Connection Schematic

For the electrics, the TLES6FT.3 utilizes a standard triangular pin configuration. Proper wiring is essential to prevent winding burnout.

• Common (C): Top Pin.
• Run (R): Bottom Right Pin.
• Start (S): Bottom Left Pin.
• Logic: The PTC starter bridges the Start and Run windings briefly to initiate rotation. If using a CSIR setup, a start capacitor (usually 60-80 µF) is placed in series with the start winding.

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Cross-Reference & Replacement Guide

If the TLES6FT.3 is unavailable, these alternatives offer similar displacement and BTU output.

Direct R134a Replacements (Same Gas)

1. Embraco: EMS 55 HLC / EMYe 70 CLP
2. ZMC/Zem: GL60AA
3. ACC / Cubigel: GVY57AA
4. Huayi: HYE60MT
5. Tecumseh: THB1355Y

R600a Conversion Alternatives (Requires System Flush)

Note: Converting from R134a to R600a requires a complete change of the capillary tube and filter drier.

1. Secop: TLY5.7KK.3
2. Embraco: EMX55CLC
3. Jiaxipera: T1114Y
4. Sikap: HMK95AA
5. Donper: L72CZ1

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Expert Insight: Installation & Maintenance Notice

As a field engineer, I’ve seen these units last 15+ years when installed correctly. The TLES6FT.3 is a “high-tolerance” unit, but it is sensitive to moisture. Because it uses POE oil, which is highly hygroscopic (absorbs water), you must keep the system sealed until the very moment of brazing.

• Pro-Tip: Always replace the filter drier when swapping this compressor. A 15g or 20g drier is standard for this capacity.
• Vacuuming: Do not skip the vacuum stage. A minimum of 250 microns is recommended to ensure the POE oil remains stable.
• Charging: Charge by weight according to the refrigerator manufacturer’s label. Overcharging R134a systems will lead to high head pressure and premature valve failure.

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Focus Keyphrase

Secop TLES6FT.3 R134a 1/5 HP LBP Compressor Specifications and Replacement Guide

SEO Title

Mbsmpro.com | Secop TLES6FT.3 Compressor | 1/5 HP | R134a | LBP Guide

Meta Description

Get the technical specs for the Secop TLES6FT.3 compressor. 1/5 HP, R134a, 149W cooling capacity. Includes wiring diagrams, replacement cross-references, and expert COP tables.

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Secop, TLES6FT.3, R134a, 1/5 HP, Compressor, Mbsmgroup, Mbsm.pro, mbsmpro.com, mbsm, Slovakia, LBP, EMS55HLC, GL60AA, GVY57AA, HYE60MT, THB1355Y, Refrigeration Repair, Danfoss Compressor

Excerpt

The Secop TLES6FT.3 is a cornerstone of modern domestic refrigeration. This 1/5 HP, R134a compressor is engineered in Slovakia for Low Back Pressure applications, offering a cooling capacity of 149W. Known for its quiet operation and energy efficiency, it is the ideal choice for medium-sized refrigerators and deep freezers looking for long-term reliability.

Mbsm.pro, Compressor, SECOP, GTK70AT, 1/5+ HP, R134a, 220-240V 50Hz, LBP, Refrigerator, Freezer

The SECOP GTK70AT is a cornerstone in the world of high-efficiency domestic refrigeration. Engineered in Slovakia, this compressor represents the evolution of the Kappa series, offering a robust solution for Low Back Pressure (LBP) applications. It is specifically designed to handle the demanding pull-down requirements of modern energy-efficient refrigerators and medium-sized chest freezers using R134a refrigerant.

Technicians value the GTK70AT for its high reliability and relatively low noise profile. Unlike standard 1/5 HP units, this “Plus” model provides a slight edge in displacement, ensuring that during high-ambient temperature conditions, the cooling curve remains stable without stressing the motor windings.

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Technical Data Sheet

Feature	Specification
Model	GTK70AT
Utilisation	LBP (Low Back Pressure)
Domaine	Freezing / Cooling
Cooling Wattage (-23.3°C)	195 W
Cubic Feet Capacity	10 – 14 cu.ft
Litres Capacity	280 – 400 Liters
Kcal/h	168 Kcal/h
Oil Type and Quantity	POE (Polyolester) / 180 ml
Horsepower (HP)	1/5+ HP
Refrigerant Type	R134a
Power Supply	200-240V ~ 50Hz
Cooling Capacity BTU	665 BTU/h
Motor Type	RSIR/RSCR (depending on starter kit)
Displacement	6.64 cm³
Winding Material	Copper
Pression Charge	Low side (0.5 to 1.5 psi running)
Capillary Recommendation	0.031″ or 0.036″ (Length varies by design)
Application Range	Double door fridges, Upright freezers
Temperature Range	-35°C to -10°C
Cooling Type	Static (No fan required for compressor)
Commercial Use	Light Commercial / Domestic
Amperage (RLA)	0.9 A to 1.1 A
LRA (Locked Rotor Amps)	6.1 A
Starter Type	PTC Relay
Capacitor	4µF Run Capacitor (Optional for RSCR)
Origin	Slovakia

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Efficiency Metrics (COP) – Performance Data

Evaporating Temp (°C)	Cooling Capacity (Watts)	Power Consumption (Watts)	COP (W/W)
-30	140	115	1.22
-25	182	131	1.39
-23.3	195	138	1.41
-20	235	150	1.57
-15	302	171	1.77
-10	385	195	1.97

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Comparison: GTK70AT vs. Standard Series

When comparing the GTK70AT to the older TLES or GL series, the GTK series offers a more compact shell design which aids in reducing vibration resonance. While a standard 1/5 HP compressor like the GL70AA uses about 6.0cm³ displacement, the GTK70AT’s 6.64cm³ displacement allows it to reach target temperatures 15% faster, making it ideal for “Tropical Class” appliances.

Professional Advice & Maintenance Tips

• Oil Sensitivity: Always use POE oil if a recharge is necessary. Never mix with mineral oil, as R134a systems will undergo wax plating and clog the capillary.
• Filter Drier: Always replace the filter drier when swapping a compressor. A 20g XH-9 molecular sieve is recommended for this model.
• Vacuuming: Ensure a vacuum of at least 500 microns to remove all moisture, as the GTK series is sensitive to internal acid formation if moisture remains.

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Compressor Cross-Reference & Replacements

5 Replacements (Same Refrigerant – R134a)

1. Embraco: EMY70HLC / EMT6170Z
2. Danfoss: TLS7F
3. Tecumseh: THG1365YS
4. Huayi: HYE69YL
5. ZMC: GL70AA / GVY66AA

5 Replacements (Different Refrigerant – R600a/R290)

1. Secop: NLE7.0KK.4 (R600a)
2. Embraco: EMX70CLC (R600a)
3. Jiaxipera: NT1114Y (R600a)
4. Secop: DLE7.5CN (R290 – High efficiency)
5. Tecumseh: TLY7.5KK.3 (R600a)

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Focus Keyphrase: Secop GTK70AT Compressor Specifications and Equivalents

SEO Title: Mbsm.pro – SECOP GTK70AT Compressor: 1/5+ HP R134a LBP Technical Review

Meta Description: Detailed technical analysis of the SECOP GTK70AT compressor. Includes cooling capacity, COP efficiency tables, HP ratings, and direct replacement guides for R134a refrigeration systems.

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Tags: Mbsmgroup, Mbsm.pro, mbsmpro.com, mbsm, GTK70AT, Secop, R134a, 1/5 HP, Refrigeration, Compressor Replacement, EMY70HLC, TLS7F, THG1365YS, GL70AA, HVAC Slovakia.

Excerpt: The SECOP GTK70AT is a high-performance 1/5+ HP compressor designed for R134a Low Back Pressure (LBP) applications. Featuring a 6.64 cm³ displacement and 195W cooling capacity at -23.3°C, this Slovakian-made unit is a reliable choice for domestic freezers and refrigerators. This guide provides full technical specs, COP metrics, and professional replacement equivalents.

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Focus Keyphrase: Matsushita Panasonic QA77C17GAX5 Refrigerator Compressor 1/4 HP R134a Specs and Cross-Reference

SEO Title: Mbsm.pro, Compressor, QA77C17GAX5, 1/4 hp, Matsushita, Cooling, R134a, 180 W, 1.2 A, 1Ph 220-240V 50Hz, LBP, RSIR

Meta Description: Full technical breakdown of the Matsushita QA77C17GAX5 compressor. Learn about its 1/4 HP capacity, R134a requirements, and the best replacement models for fridge repairs.

Slug: matsushita-qa77c17gax5-compressor-specifications-guide

Tags: Mbsmgroup, Mbsm.pro, mbsmpro.com, mbsm, Matsushita, Panasonic, QA77C17GAX5, R134a, 1/4 HP, LBP, Refrigerator Repair, Compressor Replacement, Embraco, Secop, Danfoss, LG, Tecumseh, Fridge Parts

Excerpt: The Matsushita QA77C17GAX5 is a workhorse in the refrigeration world. This 1/4 HP R134a compressor is a go-to for many household fridges and freezers. In this guide, we break down the technical specs, electrical wiring, and the most reliable replacement options to help you get your cooling system back up and running fast.

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The Technician’s Take on the Matsushita QA77C17GAX5

When you spend enough time in the field, you start to recognize certain parts that just don’t quit. The Matsushita QA77C17GAX5 is one of those units. Produced by Panasonic, this compressor has been a standard in residential cooling for years. It’s a 1/4 HP unit designed for Low Back Pressure (LBP) applications, meaning it’s built to reach and hold those deep-freeze temperatures.

What makes this model interesting is its balance. It has a 7.7cc displacement, which is a sweet spot for R134a systems. It’s powerful enough for a full-sized family refrigerator but efficient enough that it doesn’t hammer the electric bill. From an engineering perspective, the RSIR motor is simple and reliable—fewer components like capacitors mean fewer things to fail in the heat of summer.

Real-World Performance

I’ve noticed that these compressors handle voltage dips better than many modern counterparts. While some high-efficiency units are sensitive to “dirty” power, the QA77 series is built like a tank. It delivers about 180 Watts of cooling power at standard ASHRAE conditions, making it a versatile choice for a wide range of kitchen appliances.

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Complete Technical Data Table

Data Point	Technical Specification
Model	QA77C17GAX5
Utilisation	LBP (Low Back Pressure)
Domaine	Freezing / Cooling
Oil Type and Quantity	POE (Polyolester) / 230ml
Horsepower (HP)	1/4 HP
Refrigerant Type	R134a
Power Supply	220V – 240V / 50Hz / 1 Phase
Cooling Capacity	614 BTU/h (180 Watts)
Motor Type	RSIR
Displacement	7.7 cm³
Winding Material	Copper
Typical Pressure	Suction: ~1 PSI / Discharge: ~140 PSI
Capillary Tube	0.031″ Internal Diameter
Common Usage	Household Fridges, Chest Freezers
Temp Range	-35°C to -10°C
Fan Requirement	Static Cooling (Natural Convection)
Type	Domestic / Light Commercial
Amperage	1.1A to 1.3A
LRA (Locked Rotor)	14.5 Amps
Relay Type	PTC
Capacitor	None (Standard configuration)

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Wiring and Electrical Logic

Working with the electrics on this unit is straightforward. It uses a three-pin terminal setup.

• Top Pin (Common): This is where your Overload Protector (OLP) sits. It’s the safety gate that shuts the compressor down if it gets too hot.
• Bottom Left/Right (Start & Run): The PTC relay slides onto these. When you power it up, the relay gives a quick “kick” to the Start winding and then lets the Run winding take over once the motor is spinning.

Pro Tip: If the compressor won’t start but it’s humming, check the PTC relay first. They often burn out before the motor does. Shake it—if it rattles like broken glass, it’s shot.

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How it Compares to Other Brands

Manufacturer	Competitor Model	Refrigerant	Capacity (Watts)
Matsushita	QA77C17GAX5	R134a	180 W
Embraco	FFI7.5HAK	R134a	193 W
Danfoss/Secop	TLS7FT	R134a	175 W
LG	MA72LCEP	R134a	185 W

Compared to the Embraco FFI7.5HAK, the Matsushita is slightly quieter but offers almost the same cooling torque. The Embraco might pull a vacuum a bit faster, but the Matsushita generally has a longer lifespan in high-ambient environments.

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Expert Maintenance Notice

1. Vacuum is Non-Negotiable: Because this unit uses POE oil, moisture is the enemy. POE oil absorbs water from the air, which creates acid inside the system. You must pull a deep vacuum before charging.
2. Filter Drier: Don’t be lazy—always swap the filter drier when you open the system. It’s the cheapest insurance policy you can buy for a new compressor.
3. Oil Warning: Never add mineral oil to this system. It will not mix with R134a and will eventually cause a blockage or mechanical failure.

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Recommended Replacements

If you can’t find the exact QA77C17GAX5, these models are the closest matches in terms of performance and fit.

Top 5 R134a Replacements:

1. Embraco: EGAS80HLR (Very common, easy to find)
2. Secop: NLE7.5FT.4 (Solid European alternative)
3. Jiaxipera: ND1112Y (Found in many newer fridges)
4. Huayi: HYE69YG (Budget-friendly and reliable)
5. Tecumseh: AE1380Y (Standard heavy-duty replacement)

5 Replacements for Other Gases (Retrofit):

Note: These require a full system flush and oil check.

1. R600a (Isobutane): Panasonic QB77C16GAX5
2. R290 (Propane): Embraco EMX40CLC
3. R404A: Secop SC10MLX (Only for commercial setups)
4. R12 (Old standard): PW7.5K14 (Hard to find now)
5. R1234yf: Secop YF7.5FT (New eco-friendly standard)

The Bottom Line: The Matsushita QA77C17GAX5 is a reliable, “old-school” quality compressor. Whether you are repairing an existing fridge or designing a small cooling system, it’s a solid choice that has proven itself in the field for decades. Keep it clean, keep the system dry, and it’ll run for years.

Focus Keyphrase: Danfoss Secop BD35F 101Z0200 DC compressor technical specifications and 12V 24V wiring guide for mobile refrigeration Mbsmpro

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Excerpt: The Danfoss Secop BD35F 101Z0200 is the industry standard for DC mobile refrigeration. Engineered for 12V and 24V systems using R134a, this compressor offers variable speed performance from 1/8 to 1/5 hp. This Mbsmpro technical guide explores its electronic control unit, wiring schemas, and cooling capacities for trucks, boats, and solar-powered appliances.

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Mbsmpro.com, Compressor, BD35F, 1/8 to 1/5 hp, Secop Danfoss, Mobile Cooling, R134a, 35-120 W, 12-24V DC, LBP/MBP/HBP, Brushless DC, -30°C to +10°C, Cooling or Freezing

The Secop Danfoss BD35F (code 101Z0200) is widely regarded as the most reliable and versatile direct current (DC) compressor ever engineered. Designed specifically for mobile applications—ranging from marine refrigeration and truck cabins to solar-powered medical coolers—this unit utilizes a high-efficiency brushless DC motor. As a field expert, I have seen these units operate in extreme conditions where stability and low energy consumption are the highest priorities.

Unlike standard household compressors that run on a fixed frequency, the BD35F is a variable-speed machine controlled by an integrated electronic unit. This allows it to adapt its cooling capacity precisely to the demand, significantly extending battery life in off-grid environments.

Technical Specifications and Performance Data

The following table outlines the mechanical and thermodynamic characteristics of the BD35F unit.

Property	Technical Detail
Model Number	101Z0200 (BD35F)
Refrigerant	R134a
Voltage Range	12V DC and 24V DC (Automatic Switching)
Horsepower (HP)	1/8 hp (at 2000 RPM) to 1/5 hp (at 3500 RPM)
Displacement	2.00 cm³
Oil Type / Amount	Polyolester (POE) / 150 cm³
Cooling Type	Static or Fan Cooled (Recommended)
Application Range	LBP / MBP / HBP (-30°C to +10°C)
Standard Control Unit	101N0210, 101N0212, or 101N0510

Cooling Capacity and Power Consumption

The BD35F’s performance is directly linked to its rotational speed (RPM), which is determined by a resistor in the thermostat circuit.

Speed (RPM)	Cooling Capacity (Watts)	Power Consumption (Watts)	Current Draw (12V)
2,000	35 W	28 W	2.3 A
2,500	48 W	38 W	3.1 A
3,000	62 W	51 W	4.2 A
3,500	76 W	65 W	5.4 A

Note: Values based on LBP conditions (-25°C evaporation temperature).

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Electrical Schema and Control Unit Interface

The electronic unit is the “brain” of the compressor. It handles the starting sequence, battery protection (low voltage cut-out), and speed regulation.

Electronic Unit Connection Map:

1. Terminals (+) and (-): Connect directly to the battery. Crucial Notice: Always use a fuse (15A for 12V, 7.5A for 24V) and ensure wire thickness is sufficient to prevent voltage drop.
2. Terminal (F): Connection for a small 12V/24V DC fan (max 0.5A). The fan helps cool the condenser and the electronics.
3. Terminals (C) and (T): Thermostat connection. Placing a resistor here sets the compressor speed (e.g., no resistor = 2000 RPM; 1500 Ω = 3500 RPM).
4. Terminal (D): Diagnostic port. A LED connected between (+) and (D) will flash error codes to indicate faults like low battery or motor overload.
5. Terminal (P): Battery protection setting. Connecting different resistors here changes the low-voltage cut-out levels.

Logic Schema Summary:
[Battery 12/24V] –> [Electronic Unit] –> [3-Phase BLDC Output] –> [Compressor Motor]

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Comparative Analysis: BD35F vs. BD50F

In the field, technicians often choose between the BD35F and the slightly larger BD50F. While they look identical externally, their internal displacement differs.

Feature	BD35F (101Z0200)	BD50F (101Z1220)
Displacement	2.0 cm³	2.5 cm³
Max Capacity	120 Watts (HBP)	160 Watts (HBP)
Efficiency	Best for small boxes (under 100L)	Better for large coolers/freezers
Energy Usage	Lower idle/starting current	Slightly higher power requirement

Engineering Advice and Maintenance Notices

• Wire Gauge Importance: DC systems are extremely sensitive to voltage drops. If your wiring is too thin, the electronic unit will detect “low voltage” and shut down the compressor (1 flash on the LED), even if the battery is full.
• Heat Dissipation: Always install the compressor in a ventilated area. If the electronic unit reaches 85°C, it will trigger a thermal shut-down.
• Refrigerant Precision: These systems usually have very small charge weights (30g to 90g). Overcharging by even 5 grams can cause high pressure and motor stalling.
• Benefit of Variable Speed: For solar setups, running the compressor at 2000 RPM (lowest speed) is the most energy-efficient way to maintain temperature, as it minimizes the start/stop cycles that consume the most peak power.

Technician’s Troubleshooting Checklist

1. LED Flashes (1): Low voltage. Check wire connections and battery charge.
2. LED Flashes (3): Motor start error. The system is likely over-pressurized or the compressor is seized.
3. LED Flashes (5): Thermal cut-out. Improve ventilation around the electronic module.

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Mbsmgroup remains your leading resource for professional refrigeration engineering. By mastering the technical nuances of the BD35F 101Z0200, you ensure the longevity and efficiency of mobile cooling systems worldwide.

Inside the SECOP SCE Hermetic Compressor: A Complete Exploded View and Parts Identification Guide

For technicians, engineers, and procurement specialists in the commercial refrigeration industry, understanding the internal anatomy of a compressor is not just academic—it’s essential for efficient maintenance, accurate troubleshooting, and reliable sourcing of spare parts. The SECOP SCE series hermetic compressor is a cornerstone in many refrigeration systems, known for its durability and performance. This article provides a comprehensive, journalistic breakdown of its internal components using a detailed exploded view, serving as your definitive visual and technical guide.

Decoding the Exploded View: A Systematic Walkthrough

An exploded view diagram is more than just a parts list; it’s a roadmap to the machine’s soul. It shows how individual components interact within the sealed “hermetic” shell, where the motor and compressor are welded shut to protect against refrigerant and moisture. Let’s navigate the key assemblies revealed in the SCE compressor diagram.

1. The Core Compression Assembly

This is the heart of the compressor, where mechanical motion translates into refrigerant compression.

• Piston (11) & Cylinder (Part of Crankcase 15): The piston moves within the cylinder bore, creating the vacuum and pressure cycles.
• Crankshaft (8): Driven by the motor, its rotational motion is converted into the piston’s reciprocating motion via the connecting rod (9) and wrist pin (10).
• Valve System: This critical assembly manages refrigerant flow. The suction valve (17) opens to draw in low-pressure gas. The discharge valve (18), held by its stopper (19), opens to release high-pressure gas into the discharge muffler.

2. The Electrical & Drive Assembly

Nestled beneath the compressor, this assembly powers the entire system.

• Stator (27): The stationary part of the electric motor, containing copper windings, housed inside the stator case (28).
• Rotor (25): Pressed onto the crankshaft (8), it rotates within the stator’s magnetic field.
• Hermetic Terminal (31): The vital electrical pass-through that allows power cables to enter the sealed compressor housing without leaking refrigerant.

3. Structural & Ancillary Components

These parts provide support, balance, and necessary functionalities.

• Compressor Housing (30): The iconic welded steel shell that contains all components.
• Suspension Springs (29): Isolate vibrations, preventing noise and wear from transmitting to the refrigeration cabinet.
• Oil Pump (26): Often a centrifugal type on the crankshaft, it ensures critical lubrication reaches the upper bearing (7) and other moving parts.
• Counterweight (6): Balances the rotating assembly to minimize vibration, secured by a screw (4) and sometimes accompanied by a slinger (5).

Complete SECOP SCE Compressor Parts Reference Table

For quick reference and cross-referencing with part numbers, here is a complete table of the components identified in the exploded view:

Item No.	Part Name	Primary Function
01	Compressor Cover	Protects internal parts, forms suction chamber
02	Suction Connector	Inlet for low-pressure refrigerant gas
03	Discharge Connector	Outlet for high-pressure refrigerant gas
04	Counterweight Screw	Secures the counterweight to the crankshaft
05	Slinger	Assists in oil distribution
06	Counterweight	Balances rotating assembly to reduce vibration
07	Upper Bearing	Supports the top of the rotating crankshaft
08	Crankshaft	Converts motor rotation into piston movement
09	Connecting Rod	Links the crankshaft to the piston
10	Wrist Pin	Pivot point connecting piston and connecting rod
11	Piston	Compresses refrigerant within the cylinder
12	Internal Discharge Tube	Channels compressed gas to the muffler
13	Screw	Fastens various components (e.g., muffler)
14	Discharge Muffler Gasket	Seals the discharge muffler connection
15	Crankcase	Main body housing cylinders and crankshaft
16	Valve Plate Gasket	Seals between crankcase and valve plate
17	Suction Valve	One-way valve for refrigerant intake
18	Discharge Valve	One-way valve for refrigerant outlet
19	Discharge Valve Stopper	Limits discharge valve movement
21	Cylinder Head Gasket	Seals the cylinder head
22	Suction Muffler	Reduces noise from suction gas pulsation
23	Cylinder Head	Covers the cylinder, part of compression chamber
24	Cylinder Head Screw	Secures the cylinder head
25	Rotor	Rotating part of the electric motor
26	Oil Pump	Circulates oil for lubrication
27	Stator	Stationary electromagnetic part of the motor
28	Stator Case	Holds and positions the stator
29	Suspension Spring	Vibration isolation mounting
30	Compressor Housing	Main hermetic (sealed) outer shell
31	Hermetic Terminal	Electrical connection into sealed housing
32	Base Plate	Foundation for internal assembly mounts

Why This Knowledge Matters for Your Business

Whether you’re a technician diagnosing a faulty discharge valve or a sourcing manager looking for a genuine SECOP crankshaft, this visual guide empowers you with precision. Correct part identification:

• Reduces Downtime: Enables faster, accurate diagnosis.
• Ensures Compatibility: Guarantees replacement parts match the exact SCE model specifications.
• Promotes Effective Communication: Allows clear reference between teams, suppliers, and clients.