Mars 12950 – 55 MFD Oval Motor Run Capacitor, 440/370V
The Mars 12950 is a 55 microfarad (µF), dual-rated (440/370 VAC) oval run capacitor designed for continuous-duty service in single-phase motors. It is commonly installed in HVAC equipment to maintain electrical efficiency and reliable motor operation in blowers, fans, and compressors.
Technical Specifications:
Capacitance: 55 µF (±6%)
Voltage Rating: 370/440 VAC
Frequency: 50/60 Hz
Shape: Oval
Dielectric: Metallized polypropylene film
Case Material: Aluminum
Terminals: 4 quick-connect terminals
Temperature Range: -40°C to +70°C
Interrupter: Internal pressure-sensitive safety switch
Non-PCB: Yes
Performance Characteristics:
Compatible with permanent split capacitor (PSC) motor designs requiring 55 µF at up to 440V
Engineered to meet EIA-456A standards for motor run capacitors
Offers stable electrical output in continuous operation under high-temperature and high-cycle conditions
Suitable for use in HVAC air handlers, condensers, and ventilation equipment
Installation Notes:
Before installation, ensure power is disconnected and all stored voltage is discharged. Match capacitor ratings (µF and voltage) to manufacturer specifications. Installation should follow NEC code and be performed by qualified HVAC technicians to ensure compliance and safety.