ABB A3N 400 TMF 400-4000 3p F F – 1SDA066561R1 This ABB molded case circuit breaker (MCCB) from the A3N series is equipped with a frame suited for up to 125A, 400A, or 630A as specified. It features a thermal magnetic trip unit (TMF) with an adjustable range from 400A to 4000A, and a 3P fixed-pole configuration for reliable overload and short-circuit protection in power systems. Frame Size: Based on model series Trip Unit Type: TMF (Thermal Magnetic) Adjustable Range: 400–4000A Poles: 3P Mounting Type: Fixed ABB ID: 1SDA066561R1