{"product_id":"carrier-c4850c50ak02761-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50AK02761 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C4850C50AK02761\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50AK02761\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to the 24V AC signal required by your thermostat, control board, contactor coil, and all low-voltage control circuit components. When it fails, the entire control circuit goes dark — the thermostat shows no power, the system won't respond to calls for heating or cooling, and no fault codes are produced because the board itself has no power to operate.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V AC | OEM part number HT01BD236 | Factory-matched impedance and thermal cutout protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer meets Carrier's exact VA rating and thermal overload specifications. Undersized or off-tolerance generic transformers can overheat under full control circuit load, causing nuisance tripping or premature failure — especially in packaged units where multiple accessories draw from a single transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Label or photograph all wiring connections before removing the old transformer. Verify 24V output with a multimeter after installation before restoring full power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our NationalHVACParts.com warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier C4850C50AK02761\u003c\/strong\u003e packaged unit. Confirm your unit's data plate shows a 120V primary \/ 24V secondary control circuit before ordering. If you are unsure of fitment or have a multi-speed accessory load on your transformer circuit, our parts team is available to verify compatibility before you purchase. Order today and receive same-day shipping on all in-stock components.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909832528243,"sku":"CARRIE-C4850C50AK02761-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909832561011,"sku":"CARRIE-C4850C50AK02761-TRANSFORMER-HT01BD236-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BD236_29920ad1-ae43-4d61-a4b8-9f83da143804.jpg?v=1782938865","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50ak02761-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}