OEM Carrier Control Transformer 460V/24V 75VA for Model TCHC1150HEFMRADCC601

This OEM Carrier transformer (part number HT01BD702) is the factory-specified replacement for the TCHC1150HEFMRADCC601 commercial HVAC unit. The transformer steps down the 460V primary supply voltage to a safe 24V secondary output that powers the low-voltage control circuit — including the thermostat, contactors, and control board. When this transformer fails, nothing works: no cooling, no heating, no response from the thermostat. A failed transformer is often confirmed by measuring 0V on the 24V secondary while 460V is confirmed at the primary terminals.

• Specs: 460VAC Primary | 24V Secondary | 75VA Capacity | Steel core with copper windings | Compact 4.30" × 3.25" × 3.50" form factor
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part built to exact VA and voltage tolerances. Generic transformers often run underrated VA, causing thermal trips and control circuit instability under full load.
• Install Difficulty: 3/5 — High-voltage (460V) primary terminals require strict lockout/tagout procedure before servicing. Tools needed: multimeter, screwdrivers, wire nuts or spade terminals, voltage tester. Always verify 0V at primary before disconnecting leads. Licensed technician recommended.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier TCHC1150HEFMRADCC601 commercial HVAC system. Verify your unit's primary supply voltage (460V) and control circuit requirements before ordering. The 75VA rating supports full commercial control loads. Our fitment team is available to confirm compatibility before you order — order with confidence and get back up and running fast.