MARS 12908 Run Capacitor

The MARS 12908 Run Capacitor is a 10 MFD 370V Oval Run Capacitor engineered for high-duty cycle applications in residential and commercial HVAC systems. This 10 microfarad 370V AC single-section component is a standard HVAC replacement capacitor for condenser fan motors and small compressors that require stable capacitance under load. As a non-PCB capacitor, it is equipped with a physical internal pressure interrupter for fail-safe operation, meeting EIA-456 standards. The robust aluminum casing and quad-blade terminals ensure reliable heat dissipation and secure field connections. Designed for 50/60 Hz systems, this motor run capacitor maintains 10.0 MFD tolerance within +/- 6%, making it a preferred choice for contractors seeking an OEM-grade run capacitor for AC units. Its compact oval profile (1.21" Depth x 2.06" Width x 1.50" Case Height) allows for easy installation in tight electrical service panels where space is at a premium.

Key Benefits for HVAC Professionals:

• Optimized Motor Performance: Provides the necessary phase shift for efficient motor operation in AC fan motors and compressors.
• Enhanced Safety: Features an internal pressure interrupter to disconnect the capacitor in the event of an internal failure.
• Superior Durability: Rated for an operational life of 60,000 hours within a temperature range of -40°C to +70°C.
• Universal Compatibility: Replaces common 10 MFD 370V or 440V oval capacitors from various manufacturers (physical dimensions should be verified).

Common Questions:

Can I use a 10 MFD 440V capacitor to replace the MARS 12908?
Yes, you can substitute a higher voltage rating (440V) for a lower one (370V) as long as the capacitance (10 MFD) and physical dimensions match. You should never use a lower voltage capacitor than what the motor requires.

How do I know if my capacitor is bad?
Check for physical signs like a bulging top (popped interrupter) or fluid leaks. Use a multimeter with a capacitance setting to verify it reads within 6% of the 10 MFD rating; if it is outside this range, the motor may overheat or fail to start.

Is this capacitor suitable for dual-section applications?
No, the MARS 12908 is a single-section run capacitor. If your system requires a dual capacitor (e.g., 35/5 MFD), you must use a dual-rated component specifically designed for both the compressor and the fan.

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.