MARS 12737 Run Capacitor

When you're out on a service call and find a dead fan motor or a compressor that won't kick over, you need a replacement that holds up under high-duty cycles. The MARS 12737 is a contractor-grade 20 MFD 440V capacitor engineered for precision and thermal stability. This round run capacitor is a direct replacement for air conditioning capacitors and furnace blower motor capacitors, providing the necessary phase shift to keep single-phase motors running efficiently. Rated for 440 VAC, it is fully compatible with 370V applications, offering superior voltage headroom. Built with metallized polypropylene film and non-PCB dielectric fluid, it features an integrated pressure-sensitive interrupter for safety. With a standard 1-3/4 inch diameter and 4-terminal quick-connect configuration, it fits standard mounting brackets in residential condensers and air handlers. For any HVAC capacitor replacement, the MARS 12737 ensures the 20 microfarad rating remains stable across its -40°C to +70°C operating range.

• Voltage Versatility: Dual-rated for both 370V and 440V systems, providing extra protection against voltage spikes.
• High Temperature Tolerant: Rated for operation up to 70°C (158°F), preventing premature failure in sun-baked outdoor condensers.
• Safe Design: Includes a built-in pressure-sensitive interrupter and is UL and CSA recognized for meeting strict safety standards.
• Standardized Fit: The round aluminum case design allows for universal installation in most OEM capacitor straps and brackets.

• Can I use a 440V capacitor to replace a 370V unit? Yes, you can always go up in voltage rating (e.g., using a 440V to replace a 370V), as long as the capacitance (20 MFD) and physical dimensions remain the same.
• Does this capacitor work for both 50Hz and 60Hz systems? Yes, the MARS 12737 is specifically engineered for use in both 50Hz and 60Hz motor circuits.
• What does the ±6% tolerance mean? This indicates the capacitance will stay within 6% of its 20 μF rating, ensuring the motor maintains the correct torque and efficiency.

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.