Allen-Bradley 193-BSB30 Bimetallic Overload Relay

The Allen-Bradley 193-BSB30 Bimetallic Overload Relay is a compact motor-protection device designed to be used with Allen-Bradley 193-series IEC starters. It provides adjustable thermal protection for motors via a bimetallic element, with a trip-adjustment range of 2.8 to 4.2 A, allowing you to tailor protection to the motor’s full-load current. The relay features a 3‑pin male interface and a seven-terminal screw block, aligning with the standard 193 bulletin accessories and ensuring straightforward wiring within typical motor-control panels. As part of the Bulletin 193 family, it is intended to partner with compatible contactors to interrupt power when overload conditions are detected, helping prevent motor damage due to excessive current and sustained overload events without relying on solid-state components. This model-specific configuration supports reliable resettable protection in industrial applications where compact, mechanical overload protection is preferred for simple, rugged motor circuits.