What this MCCB is and what it protects
The Siemens SENTRON 3VA2010-5HM46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 100 A continuous current, designed for line protection in distribution panels. It carries a 187 kA interrupting capacity at 240 V, dropping to 121 kA at 415 V and 440 V, and 75.6 kA at 500 V — numbers that define the fault-current headroom for the downstream network. At 690 V the rating is 3 kA, so this breaker is sized for low-voltage main or feeder duty, not for 690 V branch circuits.
Ratings that decide the fit
Continuous current holds flat at 100 A from 40 °C through 70 °C ambient — no derating curve to chase across a warm panel. The insulation voltage is rated 800 V, so the breaker can sit in a 690 V system with margin. Ground-fault monitoring uses summation current formation on L + N, meaning it detects leakage by summing phase and neutral currents; this is a residual-current style detection built into the MCCB, not a separate module. Power loss at full load is 13.5 W, which matters for enclosure heat budgeting when multiple breakers are ganged.
Panel fit and integration
The 3VA2010-5HM46-0AA0 mounts on a DIN rail or panel-mount baseplate. Dimensions are 181 mm high, 140 mm wide, 86 mm deep — a 4-pole footprint that matches the standard SENTRON 3VA frame. No communication module or undervoltage release is built in, so any auxiliaries (shunt trip, alarm switch) must be added externally.