MARS 61755 Contactor

The MARS 61755 is a professional-grade 2-pole definite purpose contactor engineered for demanding HVAC and refrigeration applications. Rated for 40 FLA (Full Load Amps), this 24V coil contactor provides high-performance switching for compressors, motors, and heating elements. Featuring silver cadmium oxide contacts, it is designed to withstand the arcing common in inductive loads, ensuring superior mechanical and electrical life. The enclosed body construction reduces noise and prevents internal contamination from dust and debris, a critical factor for long-term reliability in the field.

This MARS 780 series component is a direct replacement for many OEM parts, featuring box lugs and quad quick-connect terminals to simplify field wiring for technicians. With Class F insulation and a push-to-test button for rapid diagnostics, it meets the rigorous standards required for both residential and commercial equipment. Whether you are servicing a condenser unit or industrial air handler, the MARS 61755 delivers the switching precision needed to maintain system uptime.

• Enhanced Durability: Silver-cadmium oxide contacts provide superior resistance to pitting and welding under heavy 40A loads.
• Quiet Operation: The enclosed housing design muffles mechanical clicking and protects the 24V coil from environmental contaminants.
• Flexible Installation: Equipped with large-window box lugs and quad quick-connects for versatile wire termination options.
• Reliable Diagnostic Support: Includes a manual push-to-test button, allowing for quick circuit verification during troubleshooting.
• High Thermal Stability: Class F coil insulation ensures the unit operates safely within standard HVAC technical parameters.

Can I use this 2-pole contactor to replace a single-pole unit?
Yes. Technicians often upgrade to a 2-pole contactor to ensure both legs of the power supply are broken, which provides an additional layer of electrical safety compared to 1.5-pole or single-pole models.

Is the MARS 61755 compatible with 50/60 Hz systems?
This model is rated for both 50 and 60 Hz operation, making it suitable for a wide range of electrical configurations in North American and international equipment.

What is the difference between FLA and LRA ratings for this part?
The MARS 61755 is rated for 40 Amps FLA (Full Load Amps) and up to 240 Amps LRA (Locked Rotor Amps) at 240V, ensuring it can handle the initial inrush current of high-tonnage compressors.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.