MARS 12201 Run Capacitor

As an experienced tech, you know that a high-capacitance failure on a compressor or a weak fan side can bring an entire system to a halt. The MARS 12201 Run Capacitor is a standard-setting 80/10 Microfarad 370Vac Round Dual Run Capacitor engineered for demanding HVACR service. Built to OEM specifications, this dual section motor run capacitor provides the precise phase shift required to stabilize compressor start-up and maintain condenser fan motor efficiency. Its round metal case design ensures a direct fit for most traditional mounting brackets, while the non-PCB construction and physical interrupter safety feature provide reliable protection against internal pressure buildup. Whether you are performing a seasonal tune-up or an emergency HVAC capacitor replacement, this 370V dual run capacitor meets EIA-456-A standards for long-term performance under high thermal stress. This is the go-to MARS capacitor for contractors who prioritize HVAC motor efficiency and want to eliminate nuisance callbacks caused by out-of-tolerance ratings.

• Dual-Section Versatility: Handles both the 80 MFD compressor side and the 10 MFD fan side in a single round capacitor housing.
• High-Grade Durability: Rated for up to 60,000 hours of operational life, meeting strict OEM grade performance requirements.
• Enhanced Safety: Equipped with an internal physical interrupter to prevent casing rupture in the event of an electrical fault.
• Broad Compatibility: A direct 80+10 uF 370V replacement for various Rheem, Ruud, and Protech models, including part number 43-25133-34.

Can I use a 440V capacitor to replace this 370V model?
Yes, you can always up-rate the voltage. A 440VAC capacitor will work in place of a 370VAC unit as long as the microfarad (MFD) ratings match exactly. However, never down-rate the voltage below the original spec.

What are the signs that my 80/10 capacitor has failed?
Look for a bulged top, leaking oil, or listen for a distinct humming sound from the compressor without it actually turning over. You may also notice the condenser fan spinning slowly or not at all.

Does the MARS 12201 work for both 50Hz and 60Hz systems?
Yes, this dual run capacitor is designed to operate effectively on both 50Hz and 60Hz frequencies, making it suitable for a wide range of international and domestic equipment.

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.