ABB A1A 125 TMF 25-400 3P Fixed MCCB – 1SDA066512R1 This molded case circuit breaker (MCCB) from ABB’s A1A series is engineered for dependable electrical protection. With a frame size of 125A and a thermal magnetic trip unit (TMF) adjustable from 25A to 400A, this 3-pole fixed-mounted MCCB is ideal for industrial and commercial circuit protection against overloads and short circuits. Frame Size: 125A Trip Unit Type: TMF (Thermal Magnetic) Adjustable Range: 25–400A Poles: 3P Mounting Type: Fixed ABB ID: 1SDA066512R1