{"product_id":"carrier-c4850c50zg055900-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50ZG055900 — Ships Today","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model C4850C50ZG055900\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50ZG055900\u003c\/strong\u003e packaged unit. The transformer converts 120V line voltage to the 24V AC control circuit voltage that powers your thermostat, control board, contactor coil, and all low-voltage safety controls. When the transformer fails, the entire control circuit goes dark — the thermostat loses power, the system won't respond to any call for heating or cooling, and you may measure zero volts at the secondary terminals with line voltage confirmed at the primary.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 120V AC | Output 24V AC | 40VA rating | OEM part number HT01BD236 | Factory-matched impedance and VA capacity for the C4850C50ZG055900 control circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerance specifications for this unit. Undersized or off-spec generic transformers can overheat, trip internal breakers repeatedly, or damage downstream control boards — OEM is the only safe choice for packaged commercial equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, 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 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\u003eC4850C50ZG055900\u003c\/strong\u003e packaged unit. Always verify your existing transformer's input\/output voltage and VA rating on the data plate or unit wiring diagram before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — contact us anytime.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909778821491,"sku":"CARRIE-C4850C50ZG055900-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909778854259,"sku":"CARRIE-C4850C50ZG055900-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_9c57af37-da64-4fb1-a4ac-760910c63195.jpg?v=1782899212","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zg055900-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}