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The Bard 8301-041BX is an OEM 5 VDC power supply (boxed) used in Bard wall-mounted HVAC control panels to provide stable low-voltage DC power for control electronics and related modules. If your unit has intermittent control issues, dead displays, or low-voltage DC faults, replacing this supply can restore proper operation without modifying wiring or mounting. As a genuine Bard replacement, 8301-041BX is selected for correct output and fit in compatible Bard equipment, but you should always confirm the part number against your unit model and wiring diagram before ordering.
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.