
MARS 11954 Start Capacitor
The MARS 11954 Start Capacitor is a high-capacity electrolytic component engineered for demanding motor-starting applications in HVACR systems. Rated for 270-324 Microfarad (MFD) and 220/250Vac, this round start capacitor provides the necessary high-torque boost to initiate compressor and motor rotation, effectively overcoming the high head pressures often found in systems with non-bleed TXVs or hard-starting single-phase equipment. Encased in a rugged, moisture-resistant phenolic case (Bakelite), the 11954 is built to withstand heavy-duty cycles in environmental extremes from -40°C to 65°C.
Designed as a versatile HVAC motor start capacitor, this unit fits a wide range of residential and commercial equipment, including condenser fan motors and air conditioning compressors. The MARS 11954 features standard 1/4 inch dual male terminals for rapid integration and replaces a variety of OEM and aftermarket parts with similar capacitance and voltage ratings. For technicians troubleshooting frequent trip-outs or hard-starts, this 270-324 MFD 250V capacitor ensures predictable performance and operational stability when paired with a properly functioning potential relay.
Key Benefits for Technicians:- Provides high starting torque for compressor motor start-up in high-pressure environments.
- Phenolic resin housing protects internal components from oil, dirt, grease, and excessive humidity.
- Broad 270-324 MFD range provides compatibility with multiple motor manufacturers and equipment frames.
- Compact round start capacitor design allows for easy installation in tight electrical control boxes.
- Dual-terminal configuration simplifies wiring during field replacements or upgrades.
- How do I know if my start capacitor is failing? Look for physical indicators like a blown top membrane, leaking dielectric fluid, or use a multimeter to check if the MFD reading has dropped below the 270-324 range.
- Can I use a 250V capacitor to replace a 220V unit? Yes, the voltage rating indicates the maximum threshold; a 220/250Vac capacitor is suitable for any system operating at or below those voltage levels.
- Why did my original start capacitor burn out? Common causes include a stuck potential relay, excessive heat, or frequent short-cycling, which leaves the start winding energized too long.
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.
Original: $11.84
-65%$11.84
$4.14MARS 11954 Start Capacitor
The MARS 11954 Start Capacitor is a high-capacity electrolytic component engineered for demanding motor-starting applications in HVACR systems. Rated for 270-324 Microfarad (MFD) and 220/250Vac, this round start capacitor provides the necessary high-torque boost to initiate compressor and motor rotation, effectively overcoming the high head pressures often found in systems with non-bleed TXVs or hard-starting single-phase equipment. Encased in a rugged, moisture-resistant phenolic case (Bakelite), the 11954 is built to withstand heavy-duty cycles in environmental extremes from -40°C to 65°C.
Designed as a versatile HVAC motor start capacitor, this unit fits a wide range of residential and commercial equipment, including condenser fan motors and air conditioning compressors. The MARS 11954 features standard 1/4 inch dual male terminals for rapid integration and replaces a variety of OEM and aftermarket parts with similar capacitance and voltage ratings. For technicians troubleshooting frequent trip-outs or hard-starts, this 270-324 MFD 250V capacitor ensures predictable performance and operational stability when paired with a properly functioning potential relay.
Key Benefits for Technicians:- Provides high starting torque for compressor motor start-up in high-pressure environments.
- Phenolic resin housing protects internal components from oil, dirt, grease, and excessive humidity.
- Broad 270-324 MFD range provides compatibility with multiple motor manufacturers and equipment frames.
- Compact round start capacitor design allows for easy installation in tight electrical control boxes.
- Dual-terminal configuration simplifies wiring during field replacements or upgrades.
- How do I know if my start capacitor is failing? Look for physical indicators like a blown top membrane, leaking dielectric fluid, or use a multimeter to check if the MFD reading has dropped below the 270-324 range.
- Can I use a 250V capacitor to replace a 220V unit? Yes, the voltage rating indicates the maximum threshold; a 220/250Vac capacitor is suitable for any system operating at or below those voltage levels.
- Why did my original start capacitor burn out? Common causes include a stuck potential relay, excessive heat, or frequent short-cycling, which leaves the start winding energized too long.
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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Description
The MARS 11954 Start Capacitor is a high-capacity electrolytic component engineered for demanding motor-starting applications in HVACR systems. Rated for 270-324 Microfarad (MFD) and 220/250Vac, this round start capacitor provides the necessary high-torque boost to initiate compressor and motor rotation, effectively overcoming the high head pressures often found in systems with non-bleed TXVs or hard-starting single-phase equipment. Encased in a rugged, moisture-resistant phenolic case (Bakelite), the 11954 is built to withstand heavy-duty cycles in environmental extremes from -40°C to 65°C.
Designed as a versatile HVAC motor start capacitor, this unit fits a wide range of residential and commercial equipment, including condenser fan motors and air conditioning compressors. The MARS 11954 features standard 1/4 inch dual male terminals for rapid integration and replaces a variety of OEM and aftermarket parts with similar capacitance and voltage ratings. For technicians troubleshooting frequent trip-outs or hard-starts, this 270-324 MFD 250V capacitor ensures predictable performance and operational stability when paired with a properly functioning potential relay.
Key Benefits for Technicians:- Provides high starting torque for compressor motor start-up in high-pressure environments.
- Phenolic resin housing protects internal components from oil, dirt, grease, and excessive humidity.
- Broad 270-324 MFD range provides compatibility with multiple motor manufacturers and equipment frames.
- Compact round start capacitor design allows for easy installation in tight electrical control boxes.
- Dual-terminal configuration simplifies wiring during field replacements or upgrades.
- How do I know if my start capacitor is failing? Look for physical indicators like a blown top membrane, leaking dielectric fluid, or use a multimeter to check if the MFD reading has dropped below the 270-324 range.
- Can I use a 250V capacitor to replace a 220V unit? Yes, the voltage rating indicates the maximum threshold; a 220/250Vac capacitor is suitable for any system operating at or below those voltage levels.
- Why did my original start capacitor burn out? Common causes include a stuck potential relay, excessive heat, or frequent short-cycling, which leaves the start winding energized too long.
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.












