Run Start Capacitor, Round, 70/7.5 MFD, 440/370

Mars 12166 – 70/7.5 MFD 440V Dual Round Run Capacitor The Mars 12166 is a dual-section run capacitor designed for continuous-duty operation in air conditioning and refrigeration equipment. It features a capacitance rating of 70/7.5 microfarads (MFD) and is rated for up to 440 volts AC. This component supports both compressor and fan motor circuits in systems that utilize permanent split capacitor (PSC) motors. Manufactured with aluminum construction and filled with a non-PCB dielectric fluid, the capacitor includes a pressure-sensitive interrupter for safety. It meets EIA-456-A performance standards and is suitable for demanding HVAC applications requiring consistent electrical support. Technical Specifications Capacitance: 70/7.5 µF Voltage Rating: 440 VAC Configuration: Dual run (two terminals for dual motor operation) Shape: Round Frequency: 50/60 Hz Case Material: Aluminum Dielectric Fluid: Oil-filled, non-PCB Temperature Range: -40°C to +70°C Termination: Standard ¼" quick-connect terminals Compliance: EIA-456-A Safety Feature: Pressure-sensitive interrupter Application Overview This capacitor is commonly installed in residential and light commercial HVAC systems where a dual-run component is needed to power both a compressor and condenser fan motor. It is appropriate for systems designed to accept a 70/7.5 MFD, 440V capacitor. The round profile allows for vertical or horizontal mounting in standard enclosures. Installation Notes Install only with power disconnected. Ensure capacitance and voltage ratings match OEM specifications. For best results and code compliance, installation should be performed by a licensed HVAC technician. Always discharge old capacitors and verify polarity and terminal connections.