{"product_id":"carrier-c50a503064-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A503064","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD702 for Model C50A503064\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer (part# \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C50A503064\u003c\/strong\u003e commercial packaged unit. The transformer converts 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coil, and every other low-voltage component in the control circuit. When this transformer fails, absolutely nothing works — the thermostat goes dark, the system won't respond to any call for heating or cooling, and you may blow a control fuse repeatedly. It is often the first component to check in a complete system-down scenario.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Single-phase | 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 OEM transformers from Carrier are wound to exact VA and voltage tolerances. Generic units may deliver unstable 24V output, causing nuisance trips, contactor chatter, or premature control board failure — making the OEM choice the smarter long-term investment.\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 beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Photograph all wiring connections before removal. Verify 24V output at secondary terminals after installation before closing the cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC50A503064\u003c\/strong\u003e commercial rooftop\/packaged unit. Always verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — just reach out before you buy. \u003cstrong\u003eOrder now and your part ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909670195571,"sku":"CARRIE-C50A503064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909670228339,"sku":"CARRIE-C50A503064-TRANSFORMER-HT01BD702-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-HT01BD702_355edfe4-02d2-4c7e-8a74-4b04d87228a7.jpg?v=1782940602","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a503064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}