Bard HVAC 8401-002BX Contactor

The Bard 8401-002BX Contactor is a critical heavy-duty electrical component engineered for precise load switching in HVAC compressor circuits and fan motor assemblies. This 3-pole magnetic contactor features a 24V low-voltage coil and is rated for a 25-amp full load current, making it the direct OEM replacement for legacy part numbers S8401-002 and 8401-002. Designed for high-cycle reliability in wall-mount heat pumps and air conditioners, this component ensures stable electrical continuity and prevents premature pitting of contact surfaces under heavy inductive loads. For technicians performing field maintenance, this unit provides a drop-in fit, utilizing standard spade terminals for rapid wiring integration. Its robust construction is specifically calibrated to handle the high inrush currents typical of Bard environmental control systems, maintaining system efficiency and protecting upstream control boards.

• OEM Compatibility: Replaces Bard 8401-002 and S8401-002 for a seamless fit and electrical match.
• Configuration: Three-pole (3P) switching allows for balanced control of three-phase loads or auxiliary circuit management.
• Coil Voltage: Standard 24VAC coil integrates directly with existing 24V control transformers.
• Amperage Rating: 25 FLA (Full Load Amps) capacity ensures durability in demanding cooling applications.
• Service Life: High-grade silver cadmium oxide contacts minimize arcing and extend the life of the compressor motor.

Common Technical Questions

Can I use this 3-pole contactor in a single-phase Bard unit?
Yes, technicians often use 3-pole contactors in place of 1 or 2-pole units by using the outer poles, though the 8401-002BX is specifically spec'd for systems requiring 3-pole switching to ensure contemporary phase separation.

What are the signs of a failing Bard contactor?
Look for chattering coils, burnt contact points, or a total failure of the compressor to engage despite receiving 24V from the thermostat. Resistance across closed contacts should be near zero ohms.

Is the 8401-002BX a direct replacement for the S8401-002?
Correct. The BX suffix denotes the current production standard and is the verified factory replacement part for the older S8401-002 and 8401-002 series.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.