White-Rodgers 90-340 Relay

The White-Rodgers 90-340 Relay is a heavy-duty 2PDT 24V switching relay engineered for reliable performance in fan control centers and general-purpose HVAC applications. As a direct replacement for 66C67, this Type 91 relay features a semi-enclosed design and 1/4-inch quick-connect terminals for seamless field installation. The DPDT (Double Pole Double Throw) configuration provides two sets of power-rated contacts, capable of handling 12 FLA and 60 LRA at 125 VAC, or 6 FLA and 35 LRA at 240/277 VAC. Its 24V AC coil is designed for continuous duty, featuring a 334 mA current draw and approximately 17.5 ohms of resistance. Whether used for blower motor control, pumps, or sequence switching, the 90-340 offers the rugged durability required for commercial and residential heating and cooling environments, fitting standard fan control centers including the 90-112 and 90-118E series.

• Direct Compatibility: Drop-in replacement for 66C67 and various RBM-style Type 91 24V fan relays.
• High Load Capacity: Rated for up to 15A resistive at 277 VAC and 1/2 HP at 125/250 VAC for versatile motor and heater control.
• Industrial-Grade Construction: Features fine silver contacts and a Class B coil insulation for extended electrical life under heavy duty cycles.
• Universal Mounting: Compact footprint with standard 1/4" quick-connect terminals facilitates rapid replacement in tight control cabinets.

• What happens if the coil is energized? When 24 volts is applied to the coil, the normally open (NO) contacts (terminals 1-3 and 4-6) close, while the normally closed (NC) contacts (terminals 1-2 and 4-5) open.
• Can this replace a single-pole relay? Yes, since this is a 2PDT relay, it can be wired to handle DPDT, SPDT, DPST, or SPST applications by using the appropriate terminals.
• Is this relay suitable for continuous duty? Absolutely. The 90-340 switching relay is designed for 100% duty cycles in fan control and general appliance switching.

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.