Aaon P51900 Relay

The Aaon P51900 Relay is a heavy-duty DPDT (Double Pole Double Throw) power relay designed for precision switching in high-demand HVACR systems. Part of the RH Series Compact Power Relays, this 24Vac coil relay features a 10Amp contact rating, making it an essential component for controlling fan motors, dampers, and heating elements in Aaon rooftop units and air handlers. Engineered with blade terminals for secure electrical connections and a top bracket mounting configuration, it ensures a stable installation in high-vibration environments. The miniature power relay design allows for a space-saving footprint within the control cabinet while maintaining the robust switching capacity required for industrial inductive loads. Integrating this RH2B-UT-AC24V equivalent into your service inventory ensures reliable circuit isolation and long-term performance in commercial climate control applications.

• Dual Pole Switching: The DPDT contact configuration allows for simultaneous control of two separate circuits or polarity reversal applications.
• High Current Capacity: Rated for up to 10Amps, providing reliable power handling for inductive and resistive HVAC loads.
• Durable Mounting: Includes a factory-installed top flange bracket for direct panel mounting, eliminating the need for a separate DIN rail socket in tight spaces.
• Silver Cadmium Oxide Contacts: Engineered to resist welding and pitting, ensuring consistent electrical continuity across thousands of cycles.

Is the Aaon P51900 compatible with older mechanical controllers?
Yes, as long as the system utilizes a 24Vac control circuit, this 10A relay can interface with both legacy mechanical thermostats and modern DDC systems.

How do I verify the pinout for the blade terminals?
The Aaon P51900 follows the standard 8-pin blade layout; refer to the schematic on the relay housing to identify the coil pins and the normally open/normally closed contact sets.

Can this relay be used in outdoor condenser units?
While the relay is built for durability, it should be housed within an NEMA-rated electrical enclosure to protect the blade terminal connections from moisture and atmospheric corrosion.

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.