{"product_id":"carrier-c4850c50ak03551-contactor-1k1tl0","title":"OEM Carrier 2-Pole 24V Coil Contactor for C4850C50AK03551 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 2-Pole Contactor 24V Coil for Model C4850C50AK03551\u003c\/h1\u003e\u003cp\u003eThis OEM replacement contactor is the factory-specified high-voltage relay for the \u003cstrong\u003eCarrier C4850C50AK03551\u003c\/strong\u003e packaged unit. The contactor acts as the main electrical switch that allows the 24V thermostat signal to close a high-voltage circuit, energizing the compressor and condenser fan motor. When the contactor fails — due to pitted contacts, a burned coil, or a stuck plunger — the system will not respond to a cooling call, leaving you with a unit that hums, clicks, or does nothing at all. Compatible OEM part numbers include \u003cstrong\u003eHN53CB115\u003c\/strong\u003e, \u003cstrong\u003eHN53HF122\u003c\/strong\u003e, and \u003cstrong\u003eHN53HG120\u003c\/strong\u003e.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 2-pole configuration | 24V AC coil | Factory-rated amperage for compressor and fan loads | Direct OEM drop-in replacement with matching terminal layout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM contactors from Carrier use silver-alloy contact tips rated for thousands of switching cycles. Generic contactors frequently use inferior contact materials that arc, pit, and fail prematurely — especially under the high inrush current of a scroll compressor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect box and verify zero voltage with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, 1\/4\" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before removing the old contactor.\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 Carrier \u003cstrong\u003eC4850C50AK03551\u003c\/strong\u003e packaged unit. Cross-reference your existing contactor's pole count, coil voltage, and amperage rating against your unit's data plate before ordering. OEM part numbers HN53CB115, HN53HF122, and HN53HG120 are all fulfilled by this listing. Not sure if this is your part? Our HVAC parts specialists verify fitment before every order — contact us and we'll confirm compatibility in minutes. \u003cstrong\u003eIn stock and ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909830398323,"sku":"CARRIE-C4850C50AK03551-CONTACTOR-HN53CB115","price":31.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909830431091,"sku":"CARRIE-C4850C50AK03551-CONTACTOR-HN53CB115-GEN","price":23.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-contactor-2pole-HN53CB115_ed86c63a-5ad8-4290-a85c-22c08068c112.jpg?v=1782897238","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50ak03551-contactor-1k1tl0","provider":"National HVAC Parts","version":"1.0","type":"link"}