Motor Run Capacitor, 40/4 MFD, 440/370 Volt

Contractor-Grade Reliability – JARD by Mars Motor Run Capacitor

The JARD by Mars 12785 Motor Run Capacitor delivers stable, long-term performance in HVAC systems requiring continuous-duty motor support. Engineered with a 40/4 microfarad dual rating and a 440/370V AC voltage specification, this component is designed to meet the demands of modern heating and cooling equipment in both residential and light commercial applications.

Its aluminum canister construction and fully insulated terminals offer resistance to thermal and electrical stress, supporting consistent operation in high-load environments. This capacitor is suitable for use in condenser units, air handlers, and other HVAC assemblies utilizing PSC motors.

Professional-Grade Performance

Trusted by field technicians across the HVAC industry, the JARD 12785 is manufactured to deliver:

• ✅ Stable Capacitance Output – Dual-value configuration supports compressor and fan motor operation.
• ✅ Field-Durable Housing – Rugged aluminum shell provides structural integrity in elevated temperature zones.
• ✅ Consistent Voltage Rating – Operates at 440V AC with compatibility for systems rated at 370V, allowing installation flexibility.

Component Specifications

• Capacitance: 40/4 MFD (microfarads)
• Voltage Rating: 440/370 VAC
• Configuration: Dual Motor Run Capacitor
• Enclosure: Aluminum cylindrical case with quick-connect terminals

Installation Considerations

This capacitor is factory-rated for permanent split capacitor (PSC) motor systems. Installation should be performed by a certified HVAC technician familiar with system voltage isolation and discharge protocols. Use appropriate PPE and verify terminal polarity and system requirements prior to replacement.

• ???? Screwdriver or nut driver (for bracket removal)
• ???? Multimeter or capacitance tester (for value verification)
• ???? Insulated gloves and protective eyewear

While designed for form-fit function, capacitor substitution should always be guided by the original equipment manufacturer's specs or matching tolerances for voltage and microfarad rating.

Job Site Utility

The JARD 12785 is engineered to support routine HVAC maintenance and emergency service calls where capacitor failure is diagnosed. Its consistent electrical profile and robust terminal design make it a dependable component for seasoned contractors requiring minimal failure risk during peak load periods.

System Optimization Benefits

• ✅ Dual Value Performance – Supports both compressor and fan motor circuits with a single unit.
• ✅ High Voltage Resilience – Rated for 440V operation to reduce premature dielectric breakdown.
• ✅ Compact Profile – Facilitates installation in constrained control panel configurations.
• ✅ Professional Build Standard – Tested to meet or exceed common HVAC service requirements.

Ready for Field Deployment

The JARD by Mars 12785 capacitor is a field-proven solution tailored to the demands of HVAC professionals. With a focus on consistent dielectric performance and mechanical reliability, it supports efficient motor operation and minimizes downtime during system servicing or seasonal startup procedures.