{"product_id":"carrier-c4850c48zg050500-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120\/24V for C4850C48ZG050500","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C4850C48ZG050500\u003c\/h1\u003e\u003cp\u003eThis OEM replacement control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified unit for the \u003cstrong\u003eCarrier C4850C48ZG050500\u003c\/strong\u003e packaged system. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, control board, contactor coil, and all low-voltage safety circuits. When the transformer fails — due to a shorted control wire, overloaded secondary, or age — absolutely nothing in the system responds: the thermostat goes dark, the contactor won't pull in, and no heating or cooling call is processed. It is one of the first components to check when a system is completely unresponsive.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | Foot-mount or chassis-mount bracket | Factory-matched impedance and thermal protection for Carrier C4850C48ZG050500\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD236 transformer includes factory-calibrated thermal overload protection that trips and resets automatically on brief overloads. Many generic units use lower-grade cores with ±15% voltage variance, which can damage downstream control boards and thermostats over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Confirm 24V output after install before restoring full system power. Label all wires before removing the old unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before 3 PM ship same business day from our climate-controlled parts warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered and tested for Carrier model \u003cstrong\u003eC4850C48ZG050500\u003c\/strong\u003e packaged units. Cross-reference OEM part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e against your unit's wiring diagram or data plate to confirm 40VA 120\/24V specification before ordering. Our parts specialists are available to verify fitment — contact us before you buy if you have any questions. \u003cstrong\u003eIn stock and ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909865427315,"sku":"CARRIE-C4850C48ZG050500-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909865460083,"sku":"CARRIE-C4850C48ZG050500-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_2cbad460-799a-4086-bcff-6cb5ae7e2a98.jpg?v=1782938592","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c48zg050500-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}