Overview
The Allen-Bradley 500-BOA92 /B contactor is a NEMA Size 1 AC motor control device from Rockwell Automation’s proven Bulletin 500 product line. As a top-wired contactor, all power connections mount at the top of the unit for clean, accessible panel layouts. This Series B variant is engineered for reliable switching of AC motor loads where overload protection is either not required or provided separately through external protection devices.
Key Features
- NEMA Size 1 open-type construction — compact footprint suitable for space-constrained control panels
- Top-wired configuration — all power connections at unit top for simplified wiring and maintenance access
- Bulletin 500 series — proven product line with decades of industrial deployment and extensive parts availability
- Series B designation — establishes equipment generation for identification and compatibility verification
- AC motor load rated — designed for induction motor switching without integral overload protection
Technical Specifications
Standard Bulletin 500 Size 1 contactors feature two main poles and are available in multiple coil voltage options (typically 120 VAC, 208-240 VAC, or 480 VAC at 50/60 Hz). Exact voltage, frequency, and contact configuration should be verified against the unit’s product label or associated technical documentation. All Bulletin 500 contactors meet NEMA standards for industrial motor control and are designed for long electrical contact life under varying duty cycles per IEC 947-4 load-life curve specifications.
Typical Applications
- Machine tool motor starters and production line equipment controls
- HVAC and pump motor switching
- Conveyors, fans, and general industrial motor circuits
- Multi-machine factory automation control panels
- System integrations requiring drop-in NEMA Size 1 replacement units
Compatibility & Replacements
The 500-BOA92 /B is part of the extensive Allen-Bradley Bulletin 500 contactor family. When sourcing replacements or verifying compatibility with existing control systems, confirm coil voltage, frequency, mounting type, and contact configuration match the application requirements. Other common NEMA Size 1 variants in this series include models designated for different voltage ratings and control schemes. Always reference Rockwell Automation technical data or consult with an authorized distributor to verify direct interchangeability in your specific panel layout.
