{"product_id":"carrier-c50a302551-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A302551","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C50A302551\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part #HT01BD236) is the factory-specified replacement for \u003cstrong\u003eCarrier C50A302551\u003c\/strong\u003e commercial packaged units. The transformer steps down 120V line voltage to the 24V low-voltage signal required to power the control board, thermostat, and all 24V control circuit components. When this transformer fails, nothing in the system responds — the thermostat goes dark, the contactor won't energize, and the unit will not start in any mode. 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 Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | OEM part number: HT01BD236 | Factory-matched for Carrier C50A302551\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances, ensuring stable 24V output under full control circuit load. Generic units may sag under load, causing erratic board behavior, nuisance lockouts, and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Confirm 24V output on secondary terminals after installation before closing the unit. Always verify correct wiring polarity.\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 for the Carrier C50A302551 commercial packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages against your unit's data plate before ordering to ensure correct fitment. Need help confirming compatibility? Our HVAC parts specialists verify fitment before you buy — reach out before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909706109299,"sku":"CARRIE-C50A302551-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909706142067,"sku":"CARRIE-C50A302551-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_ccd0bdf6-a2dd-4495-b792-b1a87894ca0b.jpg?v=1782940412","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a302551-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}