{"product_id":"carrier-c4850c50z2030900-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50Z2030900 — Ships Today","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C4850C50Z2030900\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50Z2030900\u003c\/strong\u003e packaged unit. The transformer steps down 120V primary voltage to 24V AC, powering the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, the result is total system non-response: the thermostat goes dark, nothing calls for heating or cooling, and the unit appears completely dead. A blown transformer is often caused by a short in the 24V control wiring, so always inspect low-voltage circuits before installing a replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 transformer | Factory-matched impedance for stable control voltage under load\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers like the HT01BD236 are wound and rated to Carrier's exact specifications, ensuring stable 24V output under full load. Generic units frequently under-deliver on VA capacity, causing nuisance tripping and premature failure of connected control boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and confirm voltage is absent before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Label all wiring before removal and verify 24V output after installation before closing the panel.\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 for the Carrier \u003cstrong\u003eC4850C50Z2030900\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or existing component label before ordering. Our fitment specialists are available to confirm compatibility — reach out before you order if you have any questions. Order by 3PM local time and your part ships today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909806510451,"sku":"CARRIE-C4850C50Z2030900-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909806543219,"sku":"CARRIE-C4850C50Z2030900-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_6268c05b-bc1a-4e65-87d0-51ff4d4052c1.jpg?v=1782938983","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z2030900-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}