ABB A1B 125 TMF 20-400 3P Fixed MCCB – 1SDA066698R1 This ABB molded case circuit breaker (MCCB) from the A1B series is equipped with a 125A frame and a thermal magnetic trip unit (TMF) with an adjustable current range from 20A to 400A. It features 3 poles and a fixed mounting configuration, ideal for industrial and commercial electrical distribution systems. Frame Size: 125A Trip Unit Type: TMF (Thermal Magnetic) Adjustable Range: 20–400A Poles: 3P Mounting Type: Fixed ABB ID: 1SDA066698R1