Allen-Bradley 1492-SPM2B200 Supplementary Protector Breaker

Allen-Bradley 1492-SPM2B200 Supplementary Protector Breaker is a 2-pole miniature circuit breaker designed to provide overcurrent protection for equipment where branch circuit protection is already in place. This 20-amp device features a Trip Curve B and has no neutral connection, making it suitable for protecting individual control circuits in industrial cabinets without introducing a neutral bus. It is rated for up to 480Y/277 VAC in US installations and up to 400 VAC for IEC configurations, with a DC rating listed up to 96 VDC where applicable. As part of the 1492-SPM family of supplementary protectors, it delivers fast response to overloads on both poles and coordinates with upstream protection to help prevent equipment damage without replacing the main protective device. The unit is UL-listed—and CSA-recognized—as a supplementary protector, aligning with Rockwell Automation documentation for these devices. Common applications include industrial control panels, motor starters, and other equipment where an additional layer of protection beyond the branch circuit breaker is desired, enabling selective tripping and improved protection of valuable components in demanding environments.