Run Capacitor, Round, 12.5 MFD, 440/370

Mars 12733 – 12.5 MFD 440/370V Round Motor Run Capacitor The Mars 12733 motor run capacitor is designed for continuous-duty operation in PSC motor applications requiring a 12.5 microfarad (MFD) capacitance. Rated for up to 440 VAC, this unit supports efficient operation of compressors, fans, and blowers in HVAC systems operating at either 370V or 440V, offering flexibility across a wide range of motor-driven equipment. This round capacitor features a metallized polypropylene film dielectric and a non-PCB aluminum case. It includes an internal pressure-sensitive interrupter for circuit isolation in fault conditions, providing enhanced system protection. Product Specifications Manufacturer: Mars Part Number: 12733 Capacitance: 12.5 MFD (±6%) Rated Voltage: 440/370 VAC Frequency: 50/60 Hz Shape: Round Case Material: Aluminum Dielectric Type: Metallized polypropylene Safety Feature: Pressure-sensitive interrupter Terminals: ¼" male quick-connect spade terminals Operating Temperature Range: -40°C to +70°C Mounting Type: Standard strap or clamp mount Environmental Compliance: Non-PCB construction Application Scope Suitable for use in residential and light commercial HVAC systems. Common applications include: PSC condenser fan motors Air handler and furnace blower motors Refrigeration compressors and ventilators Other single-phase motor-driven systems requiring a 12.5 µF capacitor Its dual-voltage compatibility (370V/440V) provides added flexibility for service technicians working across different equipment types. Installation Considerations Capacitor replacement should only be performed after verifying full power disconnection and discharging the original unit. Match both voltage and capacitance ratings to the equipment’s design specifications. Proper terminal identification and secure mounting are critical. While designed for straightforward installation, it is recommended that the Mars 12733 be installed by qualified personnel in accordance with all applicable codes and safety guidelines. Performance Notes Designed for continuous operation in PSC motor circuits Tolerates wide voltage ranges for compatibility with 370V and 440V-rated systems Aluminum construction resists corrosion and mechanical stress Compact form factor suitable for confined enclosures Interrupter disconnects internally under fault or overpressure conditions