MARS 12170 Capacitor

The MARS 12170 capacitor is a high-performance 10/10 MFD 440/370V dual run capacitor designed for demanding HVAC motor and compressor applications. This oval run capacitor features a dual-rated design, making it a versatile cross-reference for various 370V and 440V systems. Built to EIA-456-A standards, it utilizes a non-PCB oil-filled construction and a physical interrupter for enhanced safety during high-voltage fluctuations. Its compact oval footprint allows for seamless integration into tight control boxes where space is limited. As an OEM-grade replacement, it provides the precise microfarad (MFD) stability required to maintain proper power factor correction, ensuring your condenser fan motor and hermetic compressor start and run at peak efficiency without unnecessary heat buildup. For veteran technicians, the 12170 represents a reliable, industrial-grade solution to address hard starting and weak airflow issues in residential and commercial cooling units.

• Dual Voltage Compatibility: Rated for both 370V and 440V applications, reducing the need to carry multiple SKUs on the truck.
• Industrial Safety: Equipped with an internal pressure-sensitive interrupter to prevent casing rupture under fault conditions.
• Environmental Standards: 100% non-PCB oil-filled design meets modern environmental and safety regulations.
• Precision Tolerance: Ensures consistent 10/10 MFD output for stable motor torque and amperage draw.
• Small Form Factor: The oval configuration is engineered to fit into restricted clearance areas in standard HVAC electrical panels.

Can I use this 440V capacitor if my original was 370V?
Yes. You can always "upsize" the voltage rating. A 440V capacitor provides a higher insulation threshold and can safely replace a 370V unit, provided the 10/10 MFD rating matches the equipment specifications.

How do I know if my dual run capacitor is failing?
Common signs include a humming condenser fan that won't spin, a hard-starting compressor, or visible bulging on the top of the capacitor casing. Testing with a multimeter for capacitance (MFD) is the best way to confirm it is out of spec.

What does the 10/10 MFD rating mean?
This is a dual-run unit that provides 10 microfarads for the compressor (HERM) and 10 microfarads for the fan motor (FAN), sharing a common terminal.

This item is not eligible for free shipping.

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.