MARS 12910 Run Capacitor

The MARS 12910 Run Capacitor is a high-reliability technical component engineered for continuous duty in HVACR motor applications. Rated at 15 Microfarad (uF) and 370Vac, this oval motor run capacitor provides the necessary phase shift for efficient motor startup and operation in PSC (Permanent Split Capacitor) motors. As the direct replacement for 12P07 and obsolete Enviro-Tec PE-12-0506 units, the 12910 ensures seamless compatibility during field service. Built to technical standards with non-PCB oil and an internal physical interrupter for safety, this unit operates within a temperature range of -40°C to 70°C. Its compact oval aluminum casing allows for installation in tight enclosures common in condenser fan motors and small blower assemblies. For technicians, verifying the microfarad rating and operating voltage is critical; while a 440V unit can replace a 370V, the reverse is true only if the system's peak voltage remains within these parameters.

Key Benefits for Technicians:

• Universal Compatibility: Serves as a standard 15 MFD 370V oval replacement for multiple OEM brands and legacy part numbers like 12P07.
• Enhanced Safety: Features a pressure-sensitive internal interrupter designed to disconnect the capacitor safely at the end of its service life or during a fault.
• Optimized Form Factor: The oval-shaped canister provides a smaller footprint compared to round alternatives, ideal for crowded HVAC electrical panels.
• Industrial Durability: Rated for 50/60 Hz applications with a tolerance of +/- 6%, ensuring stable performance for air conditioning and refrigeration equipment.

Common Questions:

Can I use a 440V capacitor to replace this 370V MARS 12910?
Yes, in modern HVAC service, using a higher voltage rating (e.g., 440V) is acceptable as long as the microfarad (MFD) remains exactly 15. The voltage rating indicates the maximum "withstand" capacity, so a 440V unit will often run cooler and last longer in a 370V circuit.

How do I confirm the 12910 is the correct fit for my motor?
Verify the nameplate on the original motor or the markings on the existing capacitor. You must match the 15 uF rating exactly. Check the physical dimensions (approx. 1.625" case height) to ensure the oval mounting bracket will secure the new unit properly.

Is the 12910 compatible with 50Hz power systems?
Yes, the MARS 12910 is dual-rated for 50/60 Hz, making it suitable for both domestic and international HVACR equipment installations.

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.