{"product_id":"carrier-c50a503561-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A503561","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model C50A503561\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified control circuit transformer for the \u003cstrong\u003eCarrier C50A503561\u003c\/strong\u003e commercial rooftop unit. The transformer steps down 120V line voltage to 24V AC, powering the control board, thermostat circuit, contactor coils, and all low-voltage safety controls. When this transformer fails, the entire control circuit goes dead — you'll see a blank thermostat, no response to any call for heating or cooling, and often a tripped or blown control fuse. OEM part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e ensures an exact factory fit with no wiring modifications required.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA output rating | Primary: 120V AC | Secondary: 24V AC | OEM Part: HT01BD236 | Factory-matched terminal configuration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances for the C50A503561 control board draw. Undersized or off-tolerance generic transformers can overheat, trip thermal protection, and cause intermittent lockouts — problems that are notoriously difficult to diagnose in the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter (verify 24V output after install), needle-nose pliers. Always verify primary and secondary wiring orientation matches existing connections before energizing.\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 \u003cstrong\u003eC50A503561\u003c\/strong\u003e commercial packaged rooftop unit. Verify your existing transformer's VA rating and primary\/secondary voltage on the unit data plate before ordering. If your control fuse continues to blow after replacement, inspect the low-voltage wiring for shorts before condemning the transformer. Need fitment help? Our HVAC parts specialists confirm compatibility before you order — same-day shipping on all in-stock OEM parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909671244147,"sku":"CARRIE-C50A503561-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909671276915,"sku":"CARRIE-C50A503561-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_e4d5f1df-39ee-4c97-a666-ddb7bf06d447.jpg?v=1782940609","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a503561-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}