{"product_id":"carrier-c4850c50aj03551-contactor-1k1tl0","title":"OEM Carrier 2-Pole Contactor 24V Coil for C4850C50AJ03551 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 2-Pole Contactor 24V Coil for Model C4850C50AJ03551\u003c\/h1\u003e\u003cp\u003eThis OEM replacement contactor is the factory-specified high-voltage relay for the \u003cstrong\u003eCarrier C4850C50AJ03551\u003c\/strong\u003e packaged unit. The contactor acts as the main electrical switch that allows the thermostat's low-voltage (24V) signal to energize the high-voltage compressor and condenser fan motor circuits. When the contactor fails — due to pitted contacts, a burned coil, or stuck plunger — the result is an air conditioner that simply won't turn on, a compressor that won't engage, or a unit that runs continuously without cycling off. Replaces OEM part numbers \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 coil voltage | Factory-rated amperage for Carrier C4850C50AJ03551 | Heavy-duty silver-alloy contact tips for extended service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM contactor is manufactured to Carrier's exact coil pull-in voltage and contact amp ratings. Generic contactors often use lower-grade contact materials that pit faster under load, leading to premature failure and potential compressor damage from voltage drop.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Always disconnect power at the disconnect box and verify zero voltage with a multimeter before beginning. 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 re-termination.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty included. Orders placed before cutoff 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\u003eC4850C50AJ03551\u003c\/strong\u003e packaged unit. Cross-references OEM part numbers HN53CB115, HN53HF122, and HN53HG120 — all three are confirmed compatible replacements for this model. Verify your existing contactor's pole count and coil voltage against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909841408371,"sku":"CARRIE-C4850C50AJ03551-CONTACTOR-HN53CB115","price":31.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909841441139,"sku":"CARRIE-C4850C50AJ03551-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_3d33eb0a-62c7-460d-98a5-bf2cb9cd0d76.jpg?v=1782897583","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50aj03551-contactor-1k1tl0","provider":"National HVAC Parts","version":"1.0","type":"link"}