
Trane CPT0421 Run Capacitor
For high-demand service calls, the Trane CPT0421 Run Capacitor provides the reliable phase-shift field necessary for compressor and motor efficiency. This 55 MFD 440V capacitor features a heavy-duty round case design and is factory-equipped with a discharge resistor, which bleed off stored voltage to protect sensitive control boards and diagnostic tools during maintenance. As a genuine OEM HVAC replacement part, the CPT0421 maintains the precise microfarad rating required for single-stage and multi-stage Trane and American Standard condensing units.
The 440VAC voltage rating ensures this capacitor can withstand the back-EMF generated in high-ambient environments where 370V alternatives often fail. Its film-dielectric construction is engineered for low energy dissipation, ensuring that your equipment draws fewer amps and runs cooler. For the veteran technician, this is a "truck stock" essential that meets EIA-456 standards, providing a drop-in solution for motors requiring 55 microfarad capacitance with the added safety of an integrated resistor for surge mitigation.
Key Benefits:- Integrated Bleed Resistor: Safely dissipates residual electrical charges to protect internal system components.
- Heavy-Duty Round Construction: Durable metal housing fits standard mounting brackets in varied condenser electrical cabinets.
- Dual Voltage Compatibility: Rated for up to 440VAC, making it a robust replacement for both 370V and 440V applications.
- OEM Reliability: Direct replacement for Trane CPT0421, ensuring perfect performance without needing field modifications.
- Can I use this 440V capacitor to replace a 370V unit? Yes, you can always upgrade to a higher voltage rating (440V) as long as the 55 MFD capacitance remains identical.
- What is the purpose of the resistor on this part? The discharge resistor bleeds off high voltage quickly once power is disconnected, reducing the risk of arcing at the contactor and protecting your multimeter.
- Will this fit in a standard capacitor strap? The round case style is consistent with industry-standard dimensions for 55 MFD units, ensuring compatibility with existing mounting hardware.
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.
Original: $10.22
-65%$10.22
$3.58Trane CPT0421 Run Capacitor
For high-demand service calls, the Trane CPT0421 Run Capacitor provides the reliable phase-shift field necessary for compressor and motor efficiency. This 55 MFD 440V capacitor features a heavy-duty round case design and is factory-equipped with a discharge resistor, which bleed off stored voltage to protect sensitive control boards and diagnostic tools during maintenance. As a genuine OEM HVAC replacement part, the CPT0421 maintains the precise microfarad rating required for single-stage and multi-stage Trane and American Standard condensing units.
The 440VAC voltage rating ensures this capacitor can withstand the back-EMF generated in high-ambient environments where 370V alternatives often fail. Its film-dielectric construction is engineered for low energy dissipation, ensuring that your equipment draws fewer amps and runs cooler. For the veteran technician, this is a "truck stock" essential that meets EIA-456 standards, providing a drop-in solution for motors requiring 55 microfarad capacitance with the added safety of an integrated resistor for surge mitigation.
Key Benefits:- Integrated Bleed Resistor: Safely dissipates residual electrical charges to protect internal system components.
- Heavy-Duty Round Construction: Durable metal housing fits standard mounting brackets in varied condenser electrical cabinets.
- Dual Voltage Compatibility: Rated for up to 440VAC, making it a robust replacement for both 370V and 440V applications.
- OEM Reliability: Direct replacement for Trane CPT0421, ensuring perfect performance without needing field modifications.
- Can I use this 440V capacitor to replace a 370V unit? Yes, you can always upgrade to a higher voltage rating (440V) as long as the 55 MFD capacitance remains identical.
- What is the purpose of the resistor on this part? The discharge resistor bleeds off high voltage quickly once power is disconnected, reducing the risk of arcing at the contactor and protecting your multimeter.
- Will this fit in a standard capacitor strap? The round case style is consistent with industry-standard dimensions for 55 MFD units, ensuring compatibility with existing mounting hardware.
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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Description
For high-demand service calls, the Trane CPT0421 Run Capacitor provides the reliable phase-shift field necessary for compressor and motor efficiency. This 55 MFD 440V capacitor features a heavy-duty round case design and is factory-equipped with a discharge resistor, which bleed off stored voltage to protect sensitive control boards and diagnostic tools during maintenance. As a genuine OEM HVAC replacement part, the CPT0421 maintains the precise microfarad rating required for single-stage and multi-stage Trane and American Standard condensing units.
The 440VAC voltage rating ensures this capacitor can withstand the back-EMF generated in high-ambient environments where 370V alternatives often fail. Its film-dielectric construction is engineered for low energy dissipation, ensuring that your equipment draws fewer amps and runs cooler. For the veteran technician, this is a "truck stock" essential that meets EIA-456 standards, providing a drop-in solution for motors requiring 55 microfarad capacitance with the added safety of an integrated resistor for surge mitigation.
Key Benefits:- Integrated Bleed Resistor: Safely dissipates residual electrical charges to protect internal system components.
- Heavy-Duty Round Construction: Durable metal housing fits standard mounting brackets in varied condenser electrical cabinets.
- Dual Voltage Compatibility: Rated for up to 440VAC, making it a robust replacement for both 370V and 440V applications.
- OEM Reliability: Direct replacement for Trane CPT0421, ensuring perfect performance without needing field modifications.
- Can I use this 440V capacitor to replace a 370V unit? Yes, you can always upgrade to a higher voltage rating (440V) as long as the 55 MFD capacitance remains identical.
- What is the purpose of the resistor on this part? The discharge resistor bleeds off high voltage quickly once power is disconnected, reducing the risk of arcing at the contactor and protecting your multimeter.
- Will this fit in a standard capacitor strap? The round case style is consistent with industry-standard dimensions for 55 MFD units, ensuring compatibility with existing mounting hardware.
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.












