Run Capacitor, Oval, 4 Mfd., 370 Volt, CR4X370

Supco CR4X370 Oval Run Capacitor – 4 MFD, 370V | HVAC Replacement

Ensure reliable motor performance with this brand-new CR4X370 oval run capacitor. Engineered by Supco for HVAC systems, this capacitor delivers consistent power to fan motors, compressors, and other single-phase applications. Built with safety and longevity in mind, it features a physical interrupter and non-PCB biodegradable oil for clean, dependable operation.

Features & Benefits:

• Capacitance: 4 MFD


• Voltage Rating: 370 VAC


• Operating Temp: -13°F to 185°F (-25°C to 85°C)


• Type: Type Two – with Physical Interrupter for Safety


• Oil Type: Non-PCB biodegradable synthetic oil


• Tolerance: ±5%


• Case: Drawn steel oval housing


• Terminals: Quad blade quick-connect for fast installation


• Manufactured by Supco in Nanchang, Jiangxi, China

Replaces Part Numbers:

CR4X370 and compatible OEM equivalents (check specs before purchase)

Fits Applications:

• HVAC fan motors and blower assemblies


• Air conditioners, refrigeration units, and heat pumps


• Residential and light commercial systems requiring 4 MFD, 370V oval capacitors

Installation Tips:

• Disconnect power before servicing equipment


• Safely discharge old capacitor before removal


• Match MFD and voltage ratings exactly with original part


• Use insulated connectors on quad blade terminals


• Mount securely using bracket or strap to prevent vibration


• Refer to unit’s service manual for wiring diagram and safety checks

Stable performance. Safe operation. Built for HVAC reliability.