Aaon R42540 Contactor

The Aaon R42540 Contactor is a heavy-duty industrial switching solution designed for high-demand HVACR applications. Engineered as a 3-pole magnetic contactor, this component features a 24V AC coil and is rated for a 65 FLA (Full Load Amperage) capacity. It is a critical direct replacement part for specific Aaon rooftop units and chillers where reliable load management of compressors and condenser fan motors is required. The silver cadmium oxide contacts are designed to minimize arcing and resist welding, ensuring long-term electrical conductivity under high-cycle conditions. With a robust frame size and tri-pole configuration, the R42540 handles three-phase power distribution with precision. This contactor meets NEMA standards for motor starters and is built to withstand the rigorous inductive loads common in commercial climate control systems, providing the high-amperage switching reliability necessary for maintaining system uptime in technical environments.

• 65 Amp Inductive Load Rating: Optimized for large three-phase compressor and motor loads.
• 24V Control Circuit Compatibility: Integrates seamlessly with standard Aaon low-voltage control boards and thermostats.
• Durable 3-Pole Construction: Provides simultaneous switching of all three power legs to prevent phase imbalance.
• OEM-Grade Specification: Ensures correct physical footprint and terminal alignments for fast field installation and reduced downtime.
• High Dielectric Strength: Built with premium insulation materials to prevent electrical tracking and component failure.

What is the maximum locked rotor amperage (LRA) for the Aaon R42540?
This 65-amp contactor is typically rated to handle an LRA significantly higher than its FLA, often up to 390 LRA depending on the specific voltage application, though you must verify the motor nameplate requirements.

Can this contactor replace a 50-amp unit in an Aaon system?
Yes, as long as the coil voltage (24V) and physical dimensions match. Upgrading to a higher FLA rating like the R42540 can often improve the service life of the contact points under heavy cycling.

Does the R42540 include auxiliary contacts?
This model is a standard three-pole configuration; if your sequence of operation requires auxiliary feedback, you will need to verify if an add-on block is compatible with this specific frame size.

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.