1SAM340000R1005

ABB 1SAM340000R1005, model MS132-1.0T, is a compact 3-pole circuit breaker designed for primary-side transformer protection. It provides fuse less overload and short-circuit protection and is intended for control transformers used in industrial control panels, automation systems and machinery. ABB lists the unit with a rated operational current of 1.0 A and a compact 45 mm width. The breaker uses a fixed instantaneous magnetic short-circuit setting of approximately 20 times the rated operational current, helping it withstand the high inrush current normally produced when a transformer is energized. It also provides a built-in disconnect function, allowing the transformer to be manually connected or disconnected from the supply.