{"product_id":"carrier-c50a403051-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A403051","description":"\u003ch1\u003eOEM Carrier Control Circuit Transformer 40VA for Model C50A403051\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified 40VA step-down transformer for the \u003cstrong\u003eCarrier C50A403051\u003c\/strong\u003e commercial rooftop unit. The transformer converts 120V line voltage to the 24V signal required to power the control board, thermostat, and all low-voltage control circuits. When this component fails, the entire control circuit goes dead — nothing responds, including the thermostat, contactors, and safety switches. If your unit powers on at the disconnect but shows zero response at the thermostat or control board, a failed transformer is one of the first components to test.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BD236 | Factory-matched output for Carrier low-voltage control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the factory OEM unit — exact VA rating, wire gauge, and thermal protection class. Generic transformers can run under-rated VA, causing overheating, nuisance tripping, and premature control board failure from voltage sag.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Test primary and secondary voltages after installation before buttoning up the unit. Always label wires prior to disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. 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 for the Carrier \u003cstrong\u003eC50A403051\u003c\/strong\u003e commercial rooftop unit. Confirm your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. Our parts specialists are available to verify fitment — reach out before you order if you have any questions. Order today and enjoy same-day shipping on all in-stock OEM parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909684711795,"sku":"CARRIE-C50A403051-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909684744563,"sku":"CARRIE-C50A403051-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_8815950e-58ff-44bd-8287-fef4e0d24968.jpg?v=1782940507","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a403051-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}