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Bard part number 8201-050 is a 24V time delay relay used in Bard wall mount and packaged HVAC equipment to introduce a controlled delay, commonly around 5 minutes, so loads like compressors or related control circuits do not restart immediately after a call ends or power is interrupted. Using the correct OEM time delay relay helps prevent nuisance short cycling, supports proper start up sequencing, and protects electrical components from rapid on off operation that can cause premature wear. Confirm the relay style and wiring terminals match your existing relay and verify timing requirements in your unit wiring diagram before installation to ensure proper system operation.