Motors and Armatures 12221 Run Capacitor 40 Mfd 370V

Product Description

The MOTORS AND ARMATURES 12221 is a 40 microfarad (MFD), 370-volt round run capacitor designed for single-phase motor applications in HVAC systems. Run capacitors provide continuous phase-shifted current to the start and run windings of PSC motors, maintaining steady torque and efficient operation throughout the full run cycle. This unit ships in a cylindrical housing and is sized for use in residential and light commercial equipment. Licensed HVAC technicians and experienced service technicians are the typical installers for this component.

This capacitor is suited for use in residential and light commercial HVAC applications where a 40 MFD, 370-volt round capacitor is specified. Common install scenarios include condenser fan motors and compressor run circuits in split-system air conditioners and heat pumps. The round form factor fits standard capacitor brackets and mounting hardware found in most outdoor condensing units.

Key Features

• 40 MFD capacitance rating for motor run circuits
• 370-volt AC rating suitable for standard residential HVAC equipment
• Round cylindrical housing fits standard capacitor mounting brackets
• Designed for continuous-duty operation in PSC motor run circuits

Compatibility

Designed as an OEM-style replacement run capacitor for single-phase PSC motors in residential and light commercial HVAC systems requiring a 40 MFD, 370-volt round capacitor.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect and lock out all power to the unit before handling any capacitor, and discharge the existing capacitor fully using an insulated discharge tool before removing it — capacitors retain a dangerous charge even after power is removed. Verify that the replacement MFD rating and voltage rating match the original equipment specification before connecting leads. Follow all applicable local codes and manufacturer wiring diagrams during installation.

Technical Specifications

• Capacitance: 40 MFD
• Voltage Rating: 370 volts AC
• Shape: Round

Standard Information

• Brand: MOTORS AND ARMATURES
• Manufacturer Part Number: 12221