Allen-Bradley 1492-CB2 H100 Miniature Circuit Breaker

Allen-Bradley 1492-CB2H100 is a two-pole miniature circuit breaker that also functions as an energy-limiting supplementary protector and manual motor controller for small industrial motor circuits. This 1492-series device is rated for 10 A and is specified for 480/277 VAC operation, typically used in control panels to protect two conductors in 480Y/277V systems. The H100 suffix identifies the specific variant, which provides a magnetic trip range of roughly 12–20 times the rated current and a maximum motor horsepower rating of about 5 HP, making it suitable for safeguarding small motors and related control circuitry during startup surges. As a legacy Rockwell Automation component, the CB2H100 is designed to be paired with other 1492 protection devices in motor-control applications, delivering reliable disconnection and overcurrent protection within compact panel layouts. While no longer in active production, it remains referenced in specification literature and is commonly found via distributors and secondary markets serving legacy equipment fleets. In practice, technicians choose the CB2H100 when a compact, two-pole protector is required for 480/277 VAC control circuits—especially in configurations that benefit from an energy-limiting protective function paired with manual motor control capabilities.