{"product_id":"carrier-c50a304021-contactor-1k1tl0","title":"OEM Carrier 2-Pole 40A 24V Coil Definite Purpose Contactor for C50A304021 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 2-Pole Contactor 24V Coil 40A for Model C50A304021\u003c\/h1\u003e\u003cp\u003eThis OEM contactor is the factory-specified replacement for the \u003cstrong\u003eCarrier C50A304021\u003c\/strong\u003e packaged rooftop unit. The contactor is a high-voltage relay controlled by your thermostat's 24V signal — when the stat calls for cooling, the contactor closes its poles to send 240V power to the compressor and condenser fan motor. A failed contactor is one of the most common reasons a commercial HVAC system won't respond to a cooling call at all, or intermittently drops out mid-cycle. Pitted, burned, or welded contacts are telltale signs it's time to replace this part. Replaces OEM part numbers \u003cstrong\u003eHN53CB115\u003c\/strong\u003e, \u003cstrong\u003eHN53CD115\u003c\/strong\u003e, and \u003cstrong\u003eHN53HF122\u003c\/strong\u003e.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 2-pole configuration | 24V AC coil voltage | 40A contact rating | 240V load voltage | Direct OEM drop-in replacement with factory-matched contact material and coil pull-in current\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM contactors use silver-alloy contact tips rated for the exact duty cycle of your Carrier unit. Generic contactors often use lower-grade alloys that pit faster under the inrush current of scroll compressors, leading to premature failure and potential compressor damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at the disconnect box and confirm voltage is absent with a multimeter before proceeding. Tools needed: flathead and Phillips screwdrivers, 1\/4\" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before removing the old contactor to ensure correct reassembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the \u003cstrong\u003eCarrier C50A304021\u003c\/strong\u003e commercial packaged rooftop unit and cross-references OEM part numbers HN53CB115, HN53CD115, and HN53HF122. Always verify pole count, amperage rating, and coil voltage against your unit's data plate before ordering. Not sure if this is the right part? Our HVAC parts specialists confirm fitment before you buy — no guesswork, no return hassle. \u003cstrong\u003eIn stock and ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909696606579,"sku":"CARRIE-C50A304021-CONTACTOR-HN53CB115","price":36.0,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909696639347,"sku":"CARRIE-C50A304021-CONTACTOR-HN53CB115-GEN","price":27.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-contactor-2pole-HN53CB115_f3223f22-e5f6-4007-b1ef-91eb918a704b.jpg?v=1782897513","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a304021-contactor-1k1tl0","provider":"National HVAC Parts","version":"1.0","type":"link"}