ABB A1A 125 TMF 15-400 3P Fixed MCCB – 1SDA066510R1 This is a molded case circuit breaker (MCCB) from ABB’s A1A series, with a frame size of 125A. It features a thermal magnetic trip unit (TMF) with an adjustable current range from 15A to 400A. The breaker has 3 poles and is a fixed type, providing reliable protection against overloads and short circuits for industrial and commercial electrical distribution systems. Frame Size: 125A Trip Unit Type: TMF (Thermal Magnetic) Adjustable Range: 15–400A Poles: 3P Mounting: Fixed ABB ID: 1SDA066510R1