The Carrier HT680058 Transformer is a critical OEM replacement part designed for high-performance voltage regulation in light commercial and residential HVAC systems. Engineered as a 40VA control transformer, this component effectively steps down a 208/230V primary voltage to a stable 24V secondary output, providing the necessary power for contactors, relays, and integrated circuit boards. This specific model serves as a direct technical successor to the obsolete HT01CN237, ensuring seamless mechanical and electrical compatibility without the need for field modifications. Its robust frame-mount construction is built to withstand the thermal demands of continuous duty within a control internal compartment, maintaining precise secondary voltage even under fluctuating primary line conditions.

• Direct OEM Compatibility: Engineered specifically for Carrier, Bryant, and Payne equipment, eliminating the guesswork of universal fitment.
• Reliable Power Rating: The 40VA capacity provides sufficient headroom for standard cooling and heating control circuits, preventing premature component failure due to voltage drop.
• Optimized Input Range: Designed for 208/230-volt primary applications, making it a versatile choice for most dual-voltage field installations.
• Durable Construction: High-quality windings and insulation materials ensure long-term performance in high-ambient temperature environments.

Is the HT680058 compatible with 120V systems?
No, this unit is specifically wound for a 208V-230V primary voltage. Using this on a 120V circuit will result in insufficient secondary voltage and system failure.

Can this replace a transformer with a lower VA rating?
Yes, an HVAC transformer with a 40VA rating can safely replace original parts rated at 20VA or 30VA, provided the primary and secondary voltages match. The higher VA rating allows the transformer to run cooler under the same load.

What should be checked if the secondary fuse is blowing?
Before installing the new Carrier HT680058, verify there is no short in the 24V thermostat wiring or the contactor coil to prevent damage to the new component.

Item is Non Cancelable / Non Returnable

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.