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Bard 8401-034BX - 2-Pole 40 Amp Contactor

The Bard 8401-034BX is an OEM 2 pole, 40 amp contactor used to reliably switch high voltage power to major loads in Bard wall mounted HVAC equipment, most commonly the compressor circuit, using a standard 24V control signal. If you are troubleshooting a no cooling condition, chattering contactor, burned or pitted contacts, or intermittent compressor operation, replacing the contactor with the correct Bard part number helps restore proper call for cooling operation and protects other electrical components from heat damage caused by poor contact. Verify pole count, amp rating, and coil voltage against your unit wiring diagram and service literature before ordering to ensure correct fit and function.


  • Technical Specifications
  • Product number: 8401-034BX
  • Manufacturer description: Contactor 2-Pole 40 Amp -Boxed
  • Weight: 0.950 lbs
  • HTS Code: "8536.49.0075"

  • Previous Versions
  • 8401-034 (Obsolete, superseded by 8401-034BX)

$31.00 *

* Orders less than $50 may incure a minimum order fee.

What does the "BX" suffix mean?

Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.

A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.

Example: 8406-142BX is physically identical to 8406-142.