Mars M17331 Contactor 30 Amp 3 Pole 24 Volt Coil

Product Description

The MARS M17331 is a 3-pole definite purpose contactor rated at 30 amps with a 24-volt coil, designed for switching heavy electrical loads in HVAC and refrigeration applications. Contactors of this type serve as the primary switching device between the low-voltage control circuit and the line-voltage load circuit, energizing compressors, condenser fan motors, and other high-draw components on a call from the thermostat or control board. Licensed HVAC technicians install and replace these as part of routine system service and compressor circuit diagnostics.

This 3-pole configuration is suited for three-phase or three-leg single-phase load applications common in light commercial HVAC, refrigeration equipment, and larger residential condensing units. The 24-volt coil matches the standard low-voltage control circuit found in most split-system and packaged equipment. It is a direct replacement contactor used when the original contactor shows signs of pitting, coil failure, or contact welding.

Key Features

• 30-amp load rating handles compressor and motor starting current demands
• 3-pole design switches three load legs simultaneously
• 24-volt coil compatible with standard thermostat control circuits
• Definite purpose contactor construction built for HVAC and refrigeration duty cycles
• Compact form factor fits standard contactor footprints in condensing unit control panels

Compatibility

Designed as an OEM-style replacement definite purpose contactor for HVAC, refrigeration, and light commercial equipment requiring a 30-amp, 3-pole, 24-volt coil contactor.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified electrician in accordance with NEC requirements. Disconnect and lock out all power to the unit before removing the existing contactor or terminating any wiring. Verify coil voltage and pole configuration match the original device before installation. Inspect all load-side terminals and wire connections for heat damage or corrosion before returning the system to service.

Technical Specifications

• Amperage: 30 amps
• Poles: 3
• Coil Voltage: 24 volts
• UPC: 685744173311

Standard Information

• Brand: MARS
• Manufacturer Part Number: M17331