1SAM340000R1009

ABB 1SAM340000R1009, model MS132-6.3T, is a compact 3-pole circuit breaker designed for primary-side protection of control transformers. It provides fuse less overload and short-circuit protection and has a compact width of 45 mm. ABB specifies a rated operational current of 6.3 A for this model. The MS132-6.3T has an adjustable current setting range of 4.0–6.3 A. Its instantaneous magnetic short-circuit release is fixed at 126 A, equivalent to approximately 20 times the rated operational current, helping it tolerate the high inrush current associated with transformer energization. It provides Trip Class 10 protection and a rated service short-circuit breaking capacity of 100 kA at 400 V AC.