Allen-Bradley 193-BSB-16 Thermal Overload Relay

Allen-Bradley 193-BSB-16 is a miniature, bi-metallic thermal overload relay (Series B) designed to protect small motors in starter circuits. It provides overload protection in the 1.0–1.6 A operating range and is rated for use at up to 600 V, making it suitable for standard low- to mid-voltage motor control applications. The 193-BSB-16 features a manual reset, requiring intentional action to clear a trip, which helps prevent nuisance rest trips in variable-load environments. As part of Allen-Bradley's 193-series overload relays, it is intended for integration with compatible Allen-Bradley contactors in motor starter assemblies, providing automatic current-based shutdown when the motor draws excessive current or overheats. Typical uses include protecting small industrial motors in conveyors, pumps, fans, and machine tools where a compact, field-serviceable overload relay is advantageous. The relay employs a bi-metal sensing element that responds to temperature rise from overload conditions, opening the circuit to protect windings and improve equipment longevity. Designed for use within established electrical safety practices and compatible with standard Allen-Bradley components, the 193-BSB-16 is a practical choice when a 1.0–1.6 A, 600 V overload solution is required in a compact motor-control circuit.