What this breaker does on the line
The Siemens 3VA1112-6MH32-0AG0 is a 3-pole IEC frame 160 molded-case circuit breaker rated for 125 A continuous current, with a breaking capacity of 70 kA at 415 V (class H). This variant ships with a TM120M thermal-magnetic trip unit configured for starter protection (AM characteristic). The thermal element is omitted — no overload protection — so it's a short-circuit-only device intended to sit upstream of a separate motor overload relay.
Panel integration and accessories
The breaker includes a nut keeper kit for secure mounting in the panel. The auxiliary switch signals the breaker's open/closed position; the trip alarm switch changes state only when the breaker trips on fault, giving a dedicated remote indication for the SCADA or PLC input.
