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The Bard 8201-074BX is an OEM packaged 3PDT relay rated 5A at 240V, used as a control switching component in Bard wall-mount HVAC equipment to reliably energize and isolate multiple circuits from a low-voltage control signal. When contacts become pitted, stick, or chatter, replacing the relay helps restore proper operation for functions that depend on clean, consistent switching. As a genuine Bard part, 8201-074BX is built to match the original electrical specifications and mounting style used in the unit, but you should always confirm the relay type, coil voltage, and terminal layout against your unit 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.