Mars 12654 – Dual Run Capacitor, 20/7.5 MFD, 440V, Round Can
The Mars 12654 dual run capacitor is designed to provide continuous-duty support for two single-phase motors—typically a compressor and a fan—in HVAC systems. With a capacitance rating of 20/7.5 microfarads (µF) and a voltage capacity of 440 VAC, this unit offers dependable performance under high-load conditions.
Technical Specifications:
Capacitance: 20 µF (compressor) / 7.5 µF (fan)
Rated Voltage: 440 VAC
Frequency: 50/60 Hz
Can Shape: Round
Dielectric: Metallized polypropylene film
Construction: Aluminum case with three standard terminals (C, HERM, FAN)
Operating Temperature Range: -40°C to +70°C
Protection: Includes pressure-sensitive internal interrupter
Compliance: Meets EIA-456A performance standards
PCB-Free: Environmentally compliant
Application Notes:
This capacitor is commonly used in air conditioning condensers and heat pump units requiring dual capacitance values to simultaneously operate compressor and fan motors. Its 440V rating ensures tolerance to voltage fluctuations and high-temperature environments found in demanding system applications.
Installation Guidelines:
Replacement capacitors must match original µF and voltage ratings. Always verify electrical compatibility, disconnect power, and discharge stored voltage before servicing. Installation should be performed by a qualified HVAC professional to ensure proper functionality and adherence to code.