{"product_id":"carrier-c50a505064-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V-24V for C50A505064","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C50A505064\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM replacement transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C50A505064\u003c\/strong\u003e commercial packaged unit. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, control board, contactor coil, and all low-voltage control wiring. When this transformer fails, the entire control circuit goes dark — the thermostat displays nothing, the system won't respond to any call for heating or cooling, and fuses may blow repeatedly if a secondary short is present.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V | Replaces OEM part number HT01BD702 | Factory-matched connections for drop-in replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to Carrier's exact VA rating and insulation class, ensuring stable 24V output under full control-circuit load. Generic transformers often run undersized VA, causing voltage sag that trips boards and contactors unpredictably.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching wires). Photograph existing wiring before disconnecting. Secure wire nuts tightly on all splices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eC50A505064\u003c\/strong\u003e commercial rooftop\/packaged unit. Always verify primary voltage and VA rating on your unit's data plate before ordering — some configurations may use a different VA class. Our parts specialists are available to confirm fitment before you purchase. Order today and get your control circuit back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909667279219,"sku":"CARRIE-C50A505064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909667311987,"sku":"CARRIE-C50A505064-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_052f5fef-67cf-486b-8716-9743d92a0415.jpg?v=1782939384","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a505064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}