For service technicians requiring a reliable 277V switching solution, the MARS 61323 Contactor is a professional-grade 1-pole definite purpose contactor designed for high-cycle environments. This unit features a 30A inductive FLA rating (40A resistive) and is the direct replacement for C301NU50 and Furnas Centurion 2000 Class 45 series. Engineered for HVACR applications including refrigeration racks, commercial air conditioning, and electric heat, it utilizes silver-cadmium oxide contacts to maintain superior conductivity and minimize pitting under heavy inductive loads. The enclosed body design protects internal components from dust and debris, ensuring quiet operation in sensitive environments. This model includes a factory-installed jumper and quad quick-connects for streamlined field wiring. With Class F coil insulation and a 277V AC coil, this direct replacement contactor meets ARI-780 standards, offering a versatile HVAC contactor replacement that fits most universal mounting footprints, reducing truck-stock requirements and downtime on the job site. Key Benefits Enhanced Durability: Silver-cadmium oxide contacts provide extended life when switching 30 amp contactor inductive motor loads. Quiet Operation: The enclosed coil and housing reduce acoustic noise, making it suitable for commercial indoor applications. Simplified Installation: Features quad quick-connect terminals and a pre-installed jumper for rapid 1-pole configuration. Universal Compatibility: Replaces common industry parts like the C301NU50 and fits standard mounting brackets. Environmental Protection: The sealed construction prevents insect intrusion and dust accumulation on contact surfaces. Common Questions Is the MARS 61323 compatible with 240V systems? No, this specific model is wound for a 277V coil. Verify your control circuit voltage before installation to prevent coil burnout. Can I use this for resistive heating loads? Yes, while rated at 30A FLA for inductive motor loads, it is rated for up to 40A for resistive heating applications. Does this unit include a shunt? This is a 1-pole model with a shunt/jumper configuration, allowing for a permanent power path on one side as required by many OEM specifications. 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.
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