Mars Contactors

Mars Definite Purpose Contactors for HVAC & Refrigeration

Mars has been a trusted name in HVAC electrical components since 1946, supplying technicians and OEMs alike with reliable, high-performance parts. Among its most essential offerings are its Definite Purpose Contactors — the heavy-duty switching devices at the heart of air conditioning, refrigeration, and electric heating systems.

What Makes Mars Contactors Stand Out

Mars contactors are engineered specifically for the demands of HVAC/R applications. Mars Definite Purpose Contactors are designed for use on refrigeration, air conditioning, and electric heating systems, combining high performance with reliability, and featuring a universal mounting base that allows replacement of most other contactor brands. That cross-brand compatibility is a significant advantage for technicians working on diverse equipment in the field.

Straight-through wiring and a compact size speed up installation , reducing time on the job without sacrificing build quality. Mars contactors are available in a range of pole configurations and amperage ratings — including 1-pole, 2-pole, and 3-pole models at 30 amps, spanning coil voltages from 24V to 480V — covering a broad spectrum of residential and commercial applications. Terminals are offered in both lug and quick-connect styles to suit different installation preferences.

UL-Listed & Built for Demanding Environments

Mars Definite Purpose Contactors carry UL listing , confirming they meet recognized safety standards for electrical components used in HVAC systems. For commercial refrigeration applications that demand even more, Mars also offers Professional Grade Definite Purpose Contactor Auxiliary Switches engineered for today's most demanding commercial refrigeration and HVAC applications.

A Legacy of HVAC Electrical Expertise

Founded in 1946, Mars is a trusted supplier of premium motors, components, and service parts for the HVAC aftermarket and leading OEMs. The Mars product line includes high-performance and universally replaceable motors along with electrical components such as capacitors, relays, and contactors. This breadth of electrical expertise means Mars contactors are designed with a deep understanding of how they interact with the broader HVAC system — from the compressor they switch to the capacitors and relays alongside them.

Whether you are replacing a worn-out contactor on a residential split-system air conditioner or specifying parts for a commercial refrigeration unit, Mars delivers the reliability and cross-compatibility that HVAC professionals depend on. Browse the full selection of Mars Contactors or explore the complete Mars brand catalog to find the right component for your application.