{"product_id":"carrier-tchc1150hefmradcb601-transformer-h301d7","title":"OEM Carrier Transformer 460V–24V 75VA for TCHC1150HEFMRADCB601","description":"\u003ch1\u003eOEM Carrier Control Transformer 460V–24V 75VA for Model TCHC1150HEFMRADCB601\u003c\/h1\u003e\u003cp\u003eThe \u003cstrong\u003eCarrier HT01BD702\u003c\/strong\u003e is the factory-specified OEM step-down transformer for the \u003cstrong\u003eTCHC1150HEFMRADCB601\u003c\/strong\u003e commercial HVAC unit. It converts 460V line voltage to 24V to power the low-voltage control circuit — thermostats, relays, contactors, and control boards all depend on this single component. When it fails, the entire control circuit goes dead: the system will not respond to thermostat calls, display no status lights, and fail to start in any mode. A blown fuse on the secondary side is often the first sign of transformer failure.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary Voltage: 460V AC | Secondary Voltage: 24V | Power Rating: 75 VA | OEM Part Number: HT01BD702 | Factory-matched tolerances for the TCHC1150HEFMRADCB601 control circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer built to exact VA and voltage specs. Off-brand transformers frequently run undersized VA ratings, causing nuisance fuse trips, overheating, and premature control board damage — especially in high-demand commercial applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — This unit runs on 460V; always shut off the main disconnect and verify zero voltage with a calibrated meter before any work. Tools needed: multimeter, insulated screwdrivers, wire strippers, and wire nuts. Label all control wiring before disconnecting. Licensed technician recommended.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed by 3 PM ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eTCHC1150HEFMRADCB601\u003c\/strong\u003e commercial HVAC system. Always verify your unit's primary voltage (460V) and required VA rating on the equipment data plate before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — contact us today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640280404339,"sku":"CARRIE-TCHC1150HEFMRADCB601-TRANSFORMER-HT01BD702","price":70.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640280437107,"sku":"CARRIE-TCHC1150HEFMRADCB601-TRANSFORMER-HT01BD702-GEN","price":23.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BD702_c63f2674-8e50-4c6d-82fa-90aa42beca2c.jpg?v=1782942771","url":"https:\/\/nationalhvacparts.com\/products\/carrier-tchc1150hefmradcb601-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}