Utica-Dunkirk 550001339 Transformer

The Utica-Dunkirk 550001339 Transformer is a critical OEM replacement part designed for high-efficiency hydronic systems, specifically engineered for the UB90-100 Series II and Q90 Series II boilers. This heavy-duty 40VA step-down transformer converts 120V primary line voltage to 24V secondary output, providing stable power to integrated control boards, gas valves, and secondary HVAC circuits. Built to withstand the thermal demands of residential and commercial boiler rooms, this 120V to 24V HVAC transformer ensures consistent voltage regulation for sensitive electronics, preventing premature component failure caused by voltage fluctuations. Whether you are performing a seasonal tune-up or an emergency repair, utilizing a genuine Utica-Dunkirk 550001339 component maintains the factory-specified electrical profile of the ECR International heating unit. Its standard foot-mount configuration allows for a direct fit inside the junction box, minimizing field modification time for technicians.

• Precise Voltage Conversion: Steps down 120V primary to 24V secondary to safely power low-voltage boiler controls.
• High Power Capacity: Rated at 40VA to handle multiple 24V loads, including zone valves and thermostats.
• OEM Compatibility: Exact drop-in replacement for Utica and Dunkirk UB90 and Q90 series boilers.
• Durable Construction: Engineered to hold up under high-ambient-temperature environments common in modern boiler cabinets.
• Simplified Installation: Features standard lead wires for fast integration into existing wiring harnesses.

Can I use this 40VA transformer to replace a 30VA model?
Yes, you can upgrade to a higher VA rating (power capacity) like this 40VA unit, provided the primary and secondary voltages match. The 550001339 is frequently used to provide additional "headroom" for control circuits.

Is the 550001339 compatible with other boiler brands?
While this is a specific OEM part for Utica-Dunkirk (ECR International) systems, it is compatible with any HVAC application requiring a 120V input and 24V output within a 40VA load limit. Always verify mounting dimensions before attempting a cross-brand installation.

Does this unit include internal fuse protection?
This transformer is designed to work in conjunction with the boiler's integrated control board, which typically houses the circuit protection. Ensure your system's 3-amp or 5-amp fuse is intact when installing this replacement.

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.