{"product_id":"carrier-c4850c50z2060200-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50Z2060200 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C4850C50Z2060200\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50Z2060200\u003c\/strong\u003e packaged unit. The transformer steps down 120V primary line voltage to the 24V secondary signal that powers your thermostat, control board, contactor coil, and every other low-voltage control circuit in the system. When it fails, the entire control circuit goes dark — the thermostat goes blank, the system won't respond to any call for heating or cooling, and nothing happens at all. A failed transformer is often misdiagnosed as a bad control board, making correct identification critical before replacing more expensive components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01BD236 | Factory-matched electrical characteristics for Carrier C4850C50Z2060200\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by the factory control board. Undersized or off-tolerance generic units can overheat, trip the internal fuse, and leave sensitive boards under-powered — shortening their lifespan significantly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect box and verify zero voltage before proceeding. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connect terminals. Always confirm 24V output after installation before restoring system power.\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 C4850C50Z2060200\u003c\/strong\u003e packaged unit. Verify primary voltage (120V) and VA rating (40VA) on your unit's data plate before ordering. If you're unsure of fitment, our parts specialists can confirm compatibility before you buy — order with confidence and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909801529715,"sku":"CARRIE-C4850C50Z2060200-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909801562483,"sku":"CARRIE-C4850C50Z2060200-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_5e855a60-b7cd-4ee5-be56-57092cc1cf2b.jpg?v=1782939011","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z2060200-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}