Robertshaw 620-482 Transformer

This Robertshaw 620-482 transformer is a multi-tap 40VA step-down solution engineered for the demands of modern HVAC control circuits. Designed to provide a stable 24V secondary output, this component features primary leads for 120V, 208V, and 240V configurations, allowing technicians to consolidate stock for various service calls. The foot-mount design and 8-inch wire leads facilitate rapid installation inside furnace cabinets, air handlers, or rooftop units where space and access are restricted. As a Class II transformer, it meets UL 1585 standards, incorporating a thermal fuse to prevent equipment damage during low-voltage shorts or overcurrent conditions. With a 40VA power rating, it provides up to 1.67 amps of steady-state current, sufficient for powering gas valves, contactors, and smart thermostats while maintaining secondary voltage stability. This multi-tap 24V transformer serves as a reliable replacement for standard OEM parts, ensuring seamless integration with existing low-voltage wiring and HVAC electrical systems.

• Versatile Primary Input: Supports 120V, 208V, and 240V for broad system compatibility.
• Enhanced Safety: UL 1585 Class II recognized with integrated thermal protection.
• Universal Foot Mount: Standard mounting footprint simplifies the swap-out process in the field.
• Ample Lead Length: 8-inch color-coded wire leads eliminate the need for extensions during install.
• Reliable Load Capacity: Rated at 40VA to handle the inrush current of typical HVAC relays and sensors.

Can I use this to replace a 30VA transformer?
Yes, you can upgrade from a lower VA rating to a 40VA unit as long as the primary and secondary voltages match. Increasing the VA provides more headroom for additional control accessories.

Which wire do I use for a 240V application?
When wiring for 240V, utilize the Black (Common) and Orange (240V) leads on the primary side. Ensure all unused primary leads are capped individually with wire nuts to prevent shunting.

Is this unit suitable for smart thermostats?
Absolutely. The 40VA output provides sufficient current for the Wi-Fi modules and backlit displays found in modern smart thermostats without causing voltage drops across the control circuit.

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.