{"product_id":"carrier-c50a202751-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V-24V for C50A202751","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V–24V for Model C50A202751\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-replacement control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C50A202751\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When this transformer fails, the entire control circuit goes dead: the thermostat goes blank, the system is completely unresponsive, and no heating or cooling operation is possible. It is one of the first components to check when a unit shows zero activity despite having line power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | Factory-matched OEM part number HT01BD236 | Designed to exact Carrier electrical specifications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to precise VA ratings and insulation classes. Generic alternatives frequently run at reduced VA capacity, causing voltage sag under load that leads to erratic contactor chatter, nuisance lockouts, and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: multimeter (to verify 24V output after install), flathead and Phillips screwdrivers, wire nuts or spade connectors. Always confirm primary and secondary wiring polarity matches the original installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eC50A202751\u003c\/strong\u003e commercial packaged rooftop unit. Verify your unit's control circuit voltage and VA requirement on the data plate before ordering. Our fitment team is available to confirm compatibility before you buy — order with confidence and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909716234611,"sku":"CARRIE-C50A202751-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909716267379,"sku":"CARRIE-C50A202751-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_9c526445-80bb-4cce-b1e6-1a4ab68a6de2.jpg?v=1782939329","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a202751-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}