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OEM Carrier 40A Contactor 2-Pole 24V Coil for C50A503012
Carrier

OEM Carrier 40A Contactor 2-Pole 24V Coil for C50A503012

SKU: CARRIE-C50A503012-CONTACTOR-HN53CB115 Brand: Carrier

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier 2-Pole Contactor 24V Coil for Model C50A503012

This OEM replacement contactor is the factory-specified switching relay for the Carrier C50A503012 commercial packaged rooftop unit. The contactor acts as a high-voltage relay controlled by the 24V thermostat circuit — when the thermostat calls for cooling, the contactor closes and delivers line voltage to the compressor and condenser fan motor. A failed contactor is one of the most common causes of an air conditioning system that runs the indoor blower but produces no cooling. Symptoms include a buzzing or chattering contactor, a system that won't energize at all, or a compressor that drops out intermittently under load.

  • Specs: 2-pole configuration | 24V AC coil voltage | 40A contact rating | Compatible with OEM part numbers HN53CB115 and HN53CD115 | Factory-matched silver alloy contacts for long service life
  • OEM vs Generic: OEM contactors use factory-spec contact alloys and coil windings calibrated to pull in cleanly at low-voltage conditions. Generic contactors often exhibit contact pitting, coil chatter, and premature failure — especially in high-cycle commercial applications like the C50A503012.
  • Install difficulty: 2/5 — Always shut off power at the disconnect before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, and a voltage tester. Photograph all wiring connections before removal. Line voltage terminals must be torqued to spec to prevent arcing.
  • Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Engineered for the Carrier C50A503012 commercial packaged rooftop unit. Cross-references OEM part numbers HN53CB115 and HN53CD115. Verify coil voltage and pole configuration on your unit's wiring diagram or data plate before ordering. Our fitment team is available to confirm compatibility prior to purchase — same-day shipping on all in-stock orders.

Shipping Information

  • Orders placed before 3PM CST ship same business day
  • Standard delivery: 2-5 business days
  • Express shipping available at checkout
  • Free shipping on orders over $75
  • Tracking number emailed upon shipment

Return Policy

  • 30-day returns on unused parts in original packaging
  • Electrical parts (capacitors, contactors, control boards) are final sale once installed
  • Email info@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Contactor fit my Carrier C50A503012?
Yes. This is the factory-specified OEM contactor for the Carrier C50A503012. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.
How do I replace the contactor on my Carrier C50A503012?
Difficulty: Medium (30–45 min)
Step 1: Turn off breaker. Step 2: Open condensing unit panel. Step 3: Photograph ALL wiring on the contactor. Step 4: Label each wire with tape. Step 5: Disconnect wires and remove old contactor. Step 6: Mount new contactor, reconnect wires matching your photo. Step 7: Restore power and test.
My AC clicks but the compressor won’t turn on. What’s wrong?
Clicking from the outdoor unit without the compressor starting = worn contactor. The contactor sends power to the compressor. When its contacts are pitted, it clicks but can’t make solid contact. Look for: visible pitting/burn marks on the contactor face, intermittent operation, or buzzing.
Is this contactor compatible with Bryant or Payne too?
Many Carrier parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.
Should I use OEM or aftermarket for my Carrier contactor?
OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.
How fast does National HVAC Parts ship?
Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.
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Mike Rivera
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