ABB A1A 125 TMF 40-400 3P Fixed MCCB – 1SDA066514R1 This molded case circuit breaker (MCCB) from ABB's A1A series features a 125A frame size and a thermal magnetic trip unit (TMF) with adjustable settings from 40A to 400A. It is a 3-pole, fixed-mounted unit designed to offer safe and reliable protection against short circuits and overloads in industrial and commercial electrical systems. Frame Size: 125A Trip Unit Type: TMF (Thermal Magnetic) Adjustable Range: 40–400A Poles: 3P Mounting Type: Fixed ABB ID: 1SDA066514R