What this MCCB does in the panel
The Siemens 3VA2110-8KQ46-0AA0 is a SENTRON molded case circuit breaker rated for 100 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed up to that ceiling. Four poles handle three-phase plus neutral, with a rated insulation voltage of 800 V. The 330 kA breaking capacity at 415 V means it can safely interrupt fault currents up to that level without cascading upstream, which is what you need for high-fault installations like transformer secondaries or large motor control centers.
Breaking capacity across voltages
This MCCB delivers 440 kA at 240 V, 330 kA at both 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. That 330 kA at 415 V is the figure most buyers care about for 400 V-class industrial grids — it gives selectivity headroom against downstream branch breakers.
Ground-fault and communication
Ground-fault monitoring uses summation current formation on L + N conductors — it sees the vector sum and trips on residual current, not just phase imbalance. Communication function is built in, so this breaker can report status and trip events to a PLC or SCADA without an add-on module.
Panel fit and dimensions
The breaker measures 181 mm high, 140 mm wide, and 86 mm deep. Those dimensions matter for panel layout — the 140 mm width on a 4-pole frame means it occupies roughly four 35 mm DIN-rail module spaces. The 86 mm depth keeps it clear of shallow enclosure doors.