Mars 91421 2-pole Contactor 40A 24V Coil

Product Description

The MARS 91421 is a 2-pole contactor rated for 40 amps with a 24-volt coil, designed for use in HVAC systems where reliable load switching is required. Contactors like the 91421 serve as electrically operated switches that open and close the high-voltage circuit to compressors, condenser fan motors, and other high-draw loads under low-voltage control-circuit commands. The 2-pole configuration handles both legs of a single-phase load. Licensed HVAC technicians are the primary installers for this class of component.

The MARS 91421 is suited for residential and light-commercial cooling systems where a 40-amp, 24-volt coil contactor is specified. It is commonly installed in outdoor condensing units and packaged rooftop equipment to control compressor operation. Confirm that the amperage rating and coil voltage match the existing equipment specifications before installation. This contactor is sold as a single unit.

Key Features

• 40-amp load rating suitable for residential and light-commercial compressor circuits
• 24-volt coil voltage compatible with standard HVAC low-voltage control wiring
• 2-pole configuration switches both legs of a single-phase load simultaneously
• Single-unit sale for direct OEM-style replacement

Compatibility

Designed as an OEM-style replacement contactor for residential and light-commercial HVAC condensing units requiring a 2-pole, 40-amp, 24-volt coil contactor. Confirm application requirements before ordering.

Installation Notes

Installation should be performed by a licensed HVAC technician following applicable NEC and local electrical code requirements. Disconnect and lock out all power to the unit before removing the existing contactor or handling any wiring. Verify coil voltage, pole count, and amperage rating match the equipment specification before installing the replacement. Do not energize the control circuit until all load-side connections are secure and covers are in place.