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Bard 8407-003BX - Stepdown Transformer

Bard part 8407-003BX is an OEM stepdown transformer, boxed for shipment, used in Bard wall-mounted HVAC equipment to reduce incoming line voltage to the lower control voltage required by the unit so relays, contactors, boards, and safety circuits operate correctly. If you are troubleshooting a Bard unit with no low-voltage power, intermittent control operation, or a transformer that has opened from a short on the control circuit, replacing the transformer with the correct Bard OEM part helps restore proper system control and reliable start-up. Because transformer ratings and wiring connections must match the original design, confirm the exact part number and the unit model and serial number before ordering to ensure proper fit and safe operation.


  • Technical Specifications
  • Product number: 8407-003BX
  • Manufacturer description: Stepdown Transformer - Boxed
  • Weight: 29.350 lbs
  • HTS Code: "8504.31.2000"

  • Previous Versions
  • 8407-003 (Obsolete, superseded by 8407-003BX)
  • 8407-053 (Obsolete, superseded by 8407-003)

$799.00

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.