ABB A1A 125 TMF 100-1000 3P Fixed MCCB – 1SDA066520R1 This molded case circuit breaker (MCCB) from ABB's A1A series is equipped with a 125A frame and a thermal magnetic trip unit (TMF) with an adjustable current range from 100A to 1000A. It features a 3-pole, fixed mounting design, ideal for high-capacity industrial protection systems. Frame Size: 125A Trip Unit Type: TMF (Thermal Magnetic) Adjustable Range: 100–1000A Poles: 3P Mounting Type: Fixed ABB ID: 1SDA066520R1