{"product_id":"carrier-c50a302764-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A302764","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model C50A302764\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier C50A302764\u003c\/strong\u003e commercial rooftop unit. The transformer converts 120V line voltage to the 24V signal used by the control board, thermostat, contactor coil, and every other low-voltage component in the system. When the transformer fails, the entire control circuit goes dead — your thermostat goes blank, the system won't respond to any call for heating or cooling, and diagnostics become impossible without restoring 24V power first.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 output | Designed to factory OEM tolerances for Carrier commercial rooftop applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine OEM Carrier transformer (HT01BD702), wound and rated to exact factory specifications. Generic transformers often carry imprecise VA ratings that cause nuisance tripping, brownout failures, or damage to downstream control boards — always use OEM on commercial equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Turn off all power to the unit before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wiring before disconnecting. Verify 24V output with a multimeter after installation before restoring full system power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eC50A302764\u003c\/strong\u003e commercial rooftop packaged unit. Always confirm your unit's control circuit voltage requirements match 120V primary \/ 24V secondary, 40VA before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us with your model and serial number.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909702734195,"sku":"CARRIE-C50A302764-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909702766963,"sku":"CARRIE-C50A302764-TRANSFORMER-HT01BD702-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-HT01BD702_b3996134-dd79-4f8e-bb56-9871c37556df.jpg?v=1782940430","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a302764-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}