{"product_id":"carrier-c4850c50z2035200-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50Z2035200 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C4850C50Z2035200\u003c\/h1\u003e\u003cp\u003eThis OEM replacement control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified unit for the \u003cstrong\u003eCarrier C4850C50Z2035200\u003c\/strong\u003e packaged heating and cooling system. The transformer steps down line voltage from 120V to the 24V signal required by the thermostat, contactor coils, gas valve, and control board. When this component fails, the entire low-voltage control circuit loses power — the thermostat goes blank, the system stops responding to calls for heating or cooling, and no components energize. A blown fuse on the secondary side or a burned winding are the most common failure signatures.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 120V AC | Output 24V AC | 40VA rated | Class 2 transformer | OEM part number HT01BD236 | Factory-matched windings and insulation rating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage specifications, ensuring stable 24V output under full load. Generic units frequently under-deliver on VA ratings, causing voltage sag that triggers nuisance lockouts and shortens contactor coil life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter to verify 24V output after installation. Label or photograph all low-voltage wiring before disconnecting terminals.\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 Designed as a direct OEM replacement for the \u003cstrong\u003eCarrier C4850C50Z2035200\u003c\/strong\u003e packaged unit. Confirm input voltage (120V) and VA rating (40VA) against your unit's wiring diagram and data plate before ordering. Our parts specialists are available to verify fitment — order with confidence and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909806018931,"sku":"CARRIE-C4850C50Z2035200-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909806051699,"sku":"CARRIE-C4850C50Z2035200-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_24efab80-975b-4bf4-9a1e-189e35a2742e.jpg?v=1782938985","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z2035200-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}