MARS 61431 Contactor

The MARS 61431 Contactor is a professional-grade 3-pole definite purpose contactor engineered for high-demand HVACR applications. Operating with a 120V coil and rated for 30 FLA (Full Load Amps), this component is a reliable solution for switching inductive loads in commercial refrigeration, air conditioning, and electric heating systems. The enclosed body design significantly reduces noise and prevents dust or debris from contaminating the internal silver-cadmium oxide contacts, ensuring superior conductivity and a longer service life compared to open-frame alternatives.

This MARS 780 series contactor features screw terminals and an oversized arch window to simplify lead dress for field technicians. It is a direct 42BF35AF cross-reference, maintaining standard footprint compatibility for seamless retrofitting. The unit includes high-performance copper and brass conductors to minimize heat generation during operation. With class F insulation and a 600V rating, the MARS 61431 provides the mechanical durability required for frequent cycling in heavy-duty environments.

Key Benefits

• Enhanced Durability: The enclosed housing protects critical components from environmental contaminants and reduces operational noise.
• Technical Compatibility: Features a standard mounting footprint and is compatible with MARS 780 or Furnas auxiliary switches.
• Efficient Termination: Equipped with large arch window box lugs and dual QC coil terminals for flexible wiring options.
• Superior Arc Suppression: Silver-cadmium oxide contacts are specifically designed to handle the high inrush currents of inductive motors.

Common Questions

What is the difference between FLA and resistive ratings for this contactor?
The MARS 61431 is rated at 30 FLA (inductive) and 40 Amps resistive. Technicians should always size the contactor based on the inductive load of the compressor or motor to prevent premature contact welding.

Can the coil be replaced in the field?
Yes, the 120V coil is removable, allowing for field replacement without discarding the entire assembly, which reduces downtime on the job site.

Is this contactor suitable for single-phase or three-phase equipment?
This is a 3-pole contactor designed primarily for three-phase power distribution, though it can be utilized in specific single-phase applications requiring additional poles for auxiliary control.

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.