Carrier HT01BD464 Transformer

The Carrier HT01BD464 is a 40VA control transformer designed for heavy-duty commercial HVAC applications requiring a reliable step-down from 460V primary to 24V secondary power. As a genuine OEM replacement part, it ensures precise voltage regulation for sensitive low-voltage components including contactors, relays, and solid-state control boards. This 50/60 Hz rated unit is built to withstand the thermal demands of rooftop units (RTUs) and industrial air handlers, providing a stable 1.67-amp output for your 24V control circuit.

When diagnosing intermittent control failures or HVAC transformer burnout, swapping in this factory-authorized component preserves the electrical integrity of the system without the footprint issues found with universal alternatives. The HT01BD464 specifically replaces legacy part numbers HT01BD459 and HT01BD463. Its compact design fits standard mounting configurations, minimizing downtime during field service. For contractors managing 460V three-phase equipment, this transformer is the standard for maintaining OEM specifications and preventing nuisance trips in the control string.

• OEM Compatibility: Guaranteed fit and function for Carrier, Bryant, and Payne commercial equipment.
• Precise Voltage Conversion: Steps down 460V to 24V to protect thermostats and limit switches.
• Standard Power Rating: 40VA capacity supports typical commercial control loads and solenoids.
• Direct Replacement: Supersedes HT01BD459 and HT01BD463 for simplified inventory.
• Reliable Construction: High-grade windings engineered for the high-ambient environments of HVAC cabinets.

What is the maximum amperage for the 24V side?
At 40VA, this transformer supports a continuous load of approximately 1.67 amps. Exceeding this with excessive accessories/solenoids may cause the unit to overheat or fail.

Can I use this to replace a transformer in a 208V or 230V system?
No. This unit is specifically wound for a 460V primary input. Applying 208/230V will result in insufficient secondary voltage (approx. 11-12V), which will not pull in contactors.

What should I check if a new transformer burns out immediately?
Verify there is no direct short to ground in the 24V circuit, particularly in the contactor coils or outdoor wiring. Always check the primary voltage matching before energizing.

This item is not eligible for free shipping.

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.