Carrier MRA120741-2027 Compressor Overload
The Carrier MRA120741-2027 Compressor Overload is an essential OEM replacement part engineered for high-precision thermal and electrical protection in residential and commercial refrigeration systems. Designed specifically for Carrier heat pumps and air conditioning units, this internal compressor overload functions as a critical safety switch, interrupting the electrical circuit to the common winding when it detects a locked rotor current or an over-temperature condition. By utilizing a calibrated bimetal disc, this overload protector ensures the motor windings do not exceed safe operating temperatures, typically triggering around 290Ā°F to prevent insulation breakdown. This specific HVAC compressor protector (Model RW72KA0110APA) is a direct drop-in for 58TK series and 5361MRA series production runs. Its automatic reset capability allows the unit to restart once the internal temperature stabilizes, effectively safeguarding the compressor motor against short cycling and voltage fluctuations while maintaining system-wide operational efficiency without requiring manual intervention.
Key Benefits for HVACR Technicians:- Factory Authorized Quality: Provides exact physical and electrical characteristic matching for proprietary Carrier compressors.
- Thermal Sensitivity: Features a high-accuracy snap-action disc responsive to both ambient shell heat and internal current draw.
- Broad Compatibility: Supports a wide range of Carrier and Bryant models including RSCA040, B31CDU, and S36CUC series.
- Simplified Installation: Standard compressor terminal wiring allows for fast field replacement to minimize equipment downtime.
How do I verify if the MRA120741-2027 is tripped?
Using a multimeter, check for continuity across the overload terminals. If the compressor is hot and the reading is "Open" (infinite ohms), the protector has successfully tripped to shield the windings.
What causes this overload protector to trip frequently?
Persistent tripping often indicates a failing capacitor, a locked rotor condition, low refrigerant charge causing overheating, or restricted airflow across the condenser coils.
Is this a manual or automatic reset part?
This model features an automatic reset. Once the bimetal disc cools to its "Close" setpoint, it will re-energize the common terminal to attempt a motor restart.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Product Information
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Shipping & Returns
Description
The Carrier MRA120741-2027 Compressor Overload is an essential OEM replacement part engineered for high-precision thermal and electrical protection in residential and commercial refrigeration systems. Designed specifically for Carrier heat pumps and air conditioning units, this internal compressor overload functions as a critical safety switch, interrupting the electrical circuit to the common winding when it detects a locked rotor current or an over-temperature condition. By utilizing a calibrated bimetal disc, this overload protector ensures the motor windings do not exceed safe operating temperatures, typically triggering around 290Ā°F to prevent insulation breakdown. This specific HVAC compressor protector (Model RW72KA0110APA) is a direct drop-in for 58TK series and 5361MRA series production runs. Its automatic reset capability allows the unit to restart once the internal temperature stabilizes, effectively safeguarding the compressor motor against short cycling and voltage fluctuations while maintaining system-wide operational efficiency without requiring manual intervention.
Key Benefits for HVACR Technicians:- Factory Authorized Quality: Provides exact physical and electrical characteristic matching for proprietary Carrier compressors.
- Thermal Sensitivity: Features a high-accuracy snap-action disc responsive to both ambient shell heat and internal current draw.
- Broad Compatibility: Supports a wide range of Carrier and Bryant models including RSCA040, B31CDU, and S36CUC series.
- Simplified Installation: Standard compressor terminal wiring allows for fast field replacement to minimize equipment downtime.
How do I verify if the MRA120741-2027 is tripped?
Using a multimeter, check for continuity across the overload terminals. If the compressor is hot and the reading is "Open" (infinite ohms), the protector has successfully tripped to shield the windings.
What causes this overload protector to trip frequently?
Persistent tripping often indicates a failing capacitor, a locked rotor condition, low refrigerant charge causing overheating, or restricted airflow across the condenser coils.
Is this a manual or automatic reset part?
This model features an automatic reset. Once the bimetal disc cools to its "Close" setpoint, it will re-energize the common terminal to attempt a motor restart.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
