Mars 17425 40A 2-pole 24V Coil Contactor

Product Description

The MOTORS ARMATURES (MARS) 17425 is a 2-pole definite-purpose contactor rated at 40 amps with a 24-volt control coil. It is designed to switch high-amperage load circuits in residential and light commercial HVAC equipment, interrupting power to compressors and condenser fan motors on a low-voltage control signal. The 24-volt coil interfaces directly with standard thermostat control wiring, making it a common replacement component in split-system air conditioners and heat pumps. Licensed HVAC technicians install this contactor as part of routine compressor circuit maintenance and system repair.

The 17425 fits typical outdoor condensing unit applications where a 2-pole, 40-amp contactor is specified. It is suited for residential split-system air conditioners, heat pumps, and light commercial packaged units that use a 24-volt control circuit to energize the compressor load. This contactor is sold as a single unit and is intended for direct replacement of worn or failed contactors exhibiting pitting, welding, or coil failure.

Key Features

• 40-amp rating handles standard residential compressor and condenser fan motor loads
• 2-pole configuration switches both legs of a single-phase load simultaneously
• 24-volt coil voltage compatible with standard low-voltage thermostat control circuits
• Definite-purpose design suited for repetitive switching duty in HVAC applications
• Single-unit sell quantity for direct one-for-one replacement

Compatibility

Designed as an OEM-style replacement contactor for residential and light commercial HVAC systems requiring a 2-pole, 40-amp, 24-volt coil definite-purpose contactor.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with NEC requirements and local codes. Disconnect and lock out all power to the condensing unit at the disconnect box before removing the existing contactor. Note all existing wire terminations before removal and transfer them to the matching terminals on the replacement unit. Do not energize the contactor until all wiring connections are secure and panel covers are reinstalled.