{"product_id":"carrier-c4850c50z2040200-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50Z2040200 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C4850C50Z2040200\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 C4850C50Z2040200\u003c\/strong\u003e packaged heating and cooling system. The transformer steps down 120V line voltage to the 24V signal voltage required by your thermostat, contactor coils, and control board. When this component fails, the entire low-voltage control circuit goes dead — the thermostat displays nothing, no relays click, and the system will not respond to any call for heating or cooling.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | Class 2 transformer | Replaces OEM part number HT01BD236\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This factory OEM transformer is wound to exact VA and voltage specifications for the C4850C50Z2040200. Generic transformers are often undersized in VA capacity, causing overheating and premature failure — especially in systems with multiple 24V loads like two-stage controls or zone boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage before beginning. Tools needed: flathead and Phillips screwdrivers, wire nuts or terminal connectors, multimeter. Label all wiring connections before removal and confirm polarity on reinstallation.\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 as a direct fit for the \u003cstrong\u003eCarrier C4850C50Z2040200\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. If you're unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you purchase — same-day shipping available on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909805363571,"sku":"CARRIE-C4850C50Z2040200-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909805396339,"sku":"CARRIE-C4850C50Z2040200-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_204eb470-21ad-4433-a7da-97b6e6902ff1.jpg?v=1782938993","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z2040200-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}