Run Capacitor, Oval, 55 MFD, 440/370

Professional-Grade Performance – Mars 12950 55 MFD 440V Oval Motor Run Capacitor

The Mars 12950 Motor Run Capacitor is engineered to support consistent operation in single-phase induction motors. With a 55 microfarad (MFD) rating and dual voltage compatibility (370/440 VAC), it is suitable for continuous-duty HVAC applications that demand high endurance and reliability.

Constructed to meet the performance expectations of commercial and residential HVAC systems, this capacitor features a durable oval aluminum case that fits seamlessly into standard mounting configurations. It serves as a direct replacement component for motor run circuits requiring stable capacitance under load.

Advantages of the Mars 12950

• ✅ 55 MFD Capacitance: Supports optimal motor efficiency for both compressors and fan motors.
• ✅ 440/370 VAC Rating: Suitable for high-voltage motor applications operating at 50/60 Hz.
• ✅ Durable Case Design: Aluminum housing provides corrosion resistance and consistent dielectric protection under thermal and mechanical stress.
• ✅ Form Factor: Compact oval profile facilitates installation in tight equipment compartments.
• ✅ Jobsite-Ready: Manufactured to withstand conditions encountered in field installations and retrofit environments.

Technical Data

• Capacitance: 55 microfarads (MFD)
• Voltage: 370/440 VAC
• Frequency: 50/60 Hz
• Shape: Oval canister
• Intended Use: Permanent split capacitor (PSC) single-phase induction motors

Installation Guidance

Installation of the Mars 12950 should be performed by qualified HVAC technicians familiar with motor circuit design. Proper de-energizing of the system is mandatory prior to capacitor replacement. Use insulated hand tools and confirm the existing capacitor rating matches the application requirements.

• Use a multimeter to verify discharge and test capacitance prior to energizing the system.
• Ensure terminal orientation and mounting bracket alignment comply with OEM motor design.
• Always inspect terminals and wire connectors for oxidation or arcing before replacement.

Contractor Considerations

For Field Technicians: The Mars 12950 is suited for high-demand installations involving compressor or blower motor systems. It integrates with control panel layouts designed for oval capacitors and performs within operational specs across a wide range of HVAC equipment manufacturers.

For Retrofit Projects: This capacitor is an appropriate selection for service replacements where voltage stability and consistent motor torque are required. As with all motor run capacitors, verify system compatibility prior to installation.

Key Attributes

• ✅ Reliable Dielectric System: Maintains capacitance stability over extended operating cycles.
• ✅ Low-Profile Mounting: Facilitates replacement in space-constrained units.
• ✅ Industry Standard Terminals: Supports quick-connect installations with 4 terminals.
• ✅ Application Flexibility: Compatible with various HVAC brands and PSC motor configurations.

Specification-Based HVAC Support

Deploy the Mars 12950 where sustained capacitive support is essential to maintain efficient motor operation. With a proven build standard and consistent field performance, it ensures the long-term integrity of HVAC systems in both new installations and service maintenance.