{"product_id":"carrier-c50a502551-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A502551","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C50A502551\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier C50A502551\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to 24V to power the control board, thermostat, contactor coil, and all low-voltage safety circuits. When it fails, absolutely nothing in the control system responds — the thermostat goes dark, the unit won't call for heating or cooling, and you may find a blown fuse or tripped breaker on the secondary side.\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 impedance and thermal protection for reliable low-voltage output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine Carrier OEM transformer built to exact factory tolerances. Generic transformers frequently underperform on VA capacity, causing control board brownouts, nuisance lockouts, and premature contactor coil failure under full load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Verify 24V output after installation before restoring full power. Photograph all wiring connections before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In-stock units ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eC50A502551\u003c\/strong\u003e commercial rooftop\/packaged unit. Always verify transformer VA rating and primary\/secondary voltages against your unit's wiring diagram and data plate before ordering. Our fitment team is available to confirm compatibility before you buy — same-day shipping on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909676355955,"sku":"CARRIE-C50A502551-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909676388723,"sku":"CARRIE-C50A502551-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_2db8bf0a-f340-49a9-8d7a-e21aa7b8e649.jpg?v=1782940570","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a502551-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}