{"product_id":"carrier-tjaccycrtwopos005a00-transformer-h30299","title":"OEM Carrier Control Transformer 40VA 200-460V for TJACCYCRTWOPOS005A00","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 200–460V Primary \/ 24V Secondary for Model TJACCYCRTWOPOS005A00\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part number \u003cstrong\u003eHT01BD201\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier TJACCYCRTWOPOS005A00\u003c\/strong\u003e HVAC unit. Its job is to convert high-voltage line power — 200V, 230V, or 460V primary — down to a safe 24V AC secondary to power the unit's low-voltage control circuit: thermostat, contactor coil, and control board. When this transformer fails, the entire control circuit goes dark. You'll typically see a completely unresponsive thermostat, a system that won't turn on at all, or hear a low buzzing or humming from the transformer itself with no system response.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA power rating | Primary: 200 \/ 230 \/ 460V multi-tap | Secondary: 24V AC | 60 Hz | Class 2 control transformer | Tyco \/ Totaline factory build\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to exact factory VA and voltage tolerances. Undersized or off-tolerance generic transformers can overheat under full control-circuit load, causing nuisance trips or premature failure — particularly in multi-stage systems with zone valves or multiple contactors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter (verify 0V before touching terminals), wire nuts or terminal connectors. Label all low-voltage wires before disconnecting. Typical swap time is 20–30 minutes for a qualified technician.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. 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 as the direct OEM replacement for \u003cstrong\u003eCarrier TJACCYCRTWOPOS005A00\u003c\/strong\u003e. Also cross-references part numbers HT01BD201B and CIN-TRAN 2005. Always verify your unit's data plate voltage requirements match the transformer's primary tap before installing. Need help confirming fitment? Our parts team verifies compatibility before you order — order with confidence and get back up and running today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640248914291,"sku":"CARRIE-TJACCYCRTWOPOS005A00-TRANSFORMER-HT01BD201","price":64.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640248947059,"sku":"CARRIE-TJACCYCRTWOPOS005A00-TRANSFORMER-HT01BD201-GEN","price":56.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD201.jpg?v=1775025408","url":"https:\/\/nationalhvacparts.com\/products\/carrier-tjaccycrtwopos005a00-transformer-h30299","provider":"National HVAC Parts","version":"1.0","type":"link"}