Resideo AT150F1030 Transformer

When you're dealing with industrial voltages and need a steady 24V control circuit, the Resideo AT150F1030 is the go-to standard for field reliability. This 50VA transformer is engineered for multi-tap versatility, allowing you to pull from 208V, 277V, or 480V primary sources to provide a clean 27V secondary output under no-load conditions. As a Class 2 transformer, it meets strict NEC requirements for "not wet" applications, ensuring safe and code-compliant integration into HVACR control panels, relay logic, and automation systems.

Installation flexibility is the core of the AT150F1030/U design. Whether you’re performing a foot mount, plate mount, or panel mount, the included 9-inch color-coded lead wires simplify the primary to secondary wiring process. For high-stakes commercial environments, the integrated manual reset circuit breaker provides a critical layer of protection, preventing total coil failure during overcurrent events. This is a heavy-duty 60Hz transformer built with metal end bells, designed to withstand the thermal demands often found in rooftop unit (RTU) cabinets and machinery enclosures.

Key General Purpose Transformer Benefits

• Universal multi-tap primary (208/277/480 VAC) reduces the need to stock multiple SKUs for different job site voltages.
• Robust 50VA rating provides ample overhead for driving multiple contractors, HVAC controls, and sensors simultaneously.
• Dedicated manual reset button allows for quick troubleshooting and system recovery without replacing the entire unit after a trip.
• Flexible mounting options permit installation via knockout, surface, or panel configurations for maximum adaptability.
• UL 1585 recognized and NEC Class 2 compliant for professional-grade safety and adherence to building codes.

Common Questions from Technicians

Can this transformer be used on 120V or 240V circuits?
No, the Resideo AT150F1030 is specifically designed for 208V, 277V, and 480V primary inputs. For 120/240V applications, use the AT150A series or a different multi-tap model.

What is the purpose of the manual reset button?
The button serves as a dedicated circuit breaker. If the 24V secondary side is overloaded or shorts, the breaker trips to protect the transformer winding; once the fault is cleared, you can manually reset it to restore power.

Is this suitable for outdoor condenser mounting?
It features durable construction but is rated for NEC Class 2 "not wet" environments. Ensure it is installed within a NEMA-rated enclosure or a protected control cabinet to prevent direct moisture exposure.

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.