MARS 61730 Contactor

The MARS 61730 Contactor is a professional-grade 1.5-pole definite purpose contactor designed for high-demand HVACR applications. Engineered as a robust 24V 40A 1P DP Contactor, this unit features a shunt to maintain circuit continuity while switching the primary power leg. The enclosed body design minimizes noise during operation and protects internal components from dust and debris, extending the service life of the silver-cadmium oxide contacts. Built with high-performance copper and brass conductors, it maximizes current-carrying efficiency to ensure a cooler-running component under heavy inductive loads. For streamlined installation, it includes quad quick-connect terminals and an oversized arch window for box lug connections. This model serves as a direct replacement for various OEM components, including models from Siemens 45GG10AJAL, Cutler Hammer C25CNB140T, and Square D 8910DP41V14. The Class F coil insulation and push-to-test button provide technicians with reliable diagnostic capabilities and thermal stability in the field.

• Enhanced Conductivity: Utilizes brass and copper conductors rather than steel to reduce heat and improve electrical transfer.
• Universal Compatibility: Integrated box lugs and quad quick-connects allow for flexible wiring across multiple equipment brands.
• Contamination Resistance: The sealed thermoplastic housing prevents contact pitting caused by environmental pollutants.
• Field Serviceability: Features a removable coil and accessible cover for straightforward maintenance and inspection.

Is the MARS 61730 compatible with 2-pole systems?
This is a 1.5-pole (1 pole + shunt) contactor. It is designed to break only one side of the line. If your application requires breaking both power legs for safety or code compliance, a true 2-pole contactor is required.

What is the difference between the 40A Inductive and 50A Resistive ratings?
The 40A rating applies to inductive loads like compressor motors, while the 50A rating applies to resistive loads like electric heat kits. Always verify the FLA (Full Load Amps) of your equipment before installation.

Can I use this to replace a 30A contactor?
Yes, you can upgrade a 30A contactor with this 40A model as long as the 24V coil voltage and physical footprint match, providing a higher safety margin for the contacts.

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.