The Siemens 3VA2110-5HN46-0AA0 is a 4-pole SENTRON molded case circuit breaker rated for continuous 100 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Interrupting capacity hits 187 kA at 240 V and still holds 121 kA at 415 V and 440 V, which puts it squarely in the high-fault category for transformer secondaries, large motor control centers, or main feeders where SCCR requirements are stiff. The ETU350 electronic trip unit gives adjustable overload and short-time delay curves — line protection version, so it's tuned for distribution feeders rather than motor branch circuits.
Dimensions are 140 mm wide by 181 mm tall by 86 mm deep — standard 4-pole MCCB footprint for the 3VA frame. Neutral conductor protection is adjustable via the trip unit (OFF, 50%, 100%), which matters for 4-wire systems where you need to coordinate the neutral pole with the phase poles.