OEM Carrier Control Transformer 40VA 230V — HT01BC208 for Model 09DE044800

This OEM Carrier control transformer (part number HT01BC208) is the factory-specified step-down replacement for the Carrier 09DE044800. The transformer steps down line voltage from 230V primary to 115V secondary at a 40VA rating, powering the low-voltage control circuit that operates the thermostat, relays, and safety switches throughout the system. When the transformer fails, the entire control circuit loses power — resulting in a completely unresponsive system, a tripped breaker, or a blown fuse on the secondary side.

• Specs: 40VA rating | 230V primary | 115V secondary | 50/60 Hz | OEM part number HT01BC208 | Cross-references: 320659-301, 2-05757-1
• OEM vs Generic: This is a genuine Totaline/Carrier OEM transformer wound to exact factory VA and voltage tolerances. Generic substitutes often fall outside ±5% tolerance, risking nuisance trips and premature board damage.
• Install difficulty: 3/5 — Always disconnect power at the disconnect switch and breaker before servicing. Tools needed: multimeter, flathead and Phillips screwdrivers, wire nuts or terminals. Test secondary voltage output after install before restoring full power.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Directly fits Carrier model 09DE044800. Verify your unit's data plate primary voltage and VA requirements before ordering. Our fitment team is available to confirm compatibility before you buy — in stock and ready to ship today.