International Environmental 50012003 Transformer

The International Environmental 50012003 Transformer is a heavy-duty, OEM replacement control transformer specifically engineered for fan coil units and industrial HVACR applications. Operating as a step-down unit, it converts a 277V primary input to a stable 24V secondary output, providing the consistent low-voltage power necessary for thermostats, contactors, and control boards. With a 40VA power rating, this 50/60Hz transformer supports a continuous load of up to 1.67 amps, making it a reliable solution for standard cooling and heating control circuits without the risk of saturation or excessive heat buildup under normal operating conditions.

Designed for professional field installation, this foot-mounted transformer features a robust bracket for secure attachment within the cabinet. The 50012003 model (also identified as E045-50012003) is a direct fit for many IEC-branded air handling units, ensuring seamless electrical integration. For contractors managing 277V commercial power systems, this 40VA HVAC transformer offers a compact footprint and reliable thermal performance, ensuring that your control systems remain energized and responsive in high-demand environments.

Key Benefits

• Direct OEM Compatibility: Engineered by International Environmental Corporation as a genuine replacement for part 50012003 and E045-50012003.
• Industrial-Grade High Voltage Input: Specifically designed for 277V AC circuits commonly found in commercial and industrial lighting and HVAC distribution.
• Secure Foot-Mount Design: Features a durable mounting base for easy installation and vibration resistance within fan coil units.
• Standard 24V Output: Provides the industry-standard 24V secondary voltage required for most HVACR control logic and 24VAC components.
• Reliable 40VA Capacity: Sufficient power for driving zone valves, relays, and modern digital thermostats in standard commercial configurations.

Common Questions

Can I use this 40VA transformer to power multiple UV lights or zoning panels?
While a 40VA transformer is robust for standard controls, adding high-draw accessories like UV systems or multiple zone dampers can exceed the 1.67-amp limit. Always calculate the total VA load of all peripheral devices to ensure they do not exceed the 40VA threshold to prevent premature failure.

Is the 50012003 interchangeable with transformers of different primary voltages?
No. This specific model is wound for a 277V primary input. Connecting it to 120V or 240V will result in incorrect secondary output voltage and potential damage to the control circuit. Verify your line voltage at the unit before installation.

What should I check if my control board is not receiving power from this transformer?
First, confirm 277V at the primary leads. If input power is present but there is no 24V output, check for a blown inline fuse or a short circuit in the secondary low-voltage wiring that may have tripped or damaged the unit.

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.