The Siemens 3VA2110-5HL32-0KA0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It's a 3-pole unit designed for line protection, with a shunt trip (STL) auxiliary release built in. That shunt trip lets you remotely trip the breaker from a control signal or emergency-stop circuit, which is common in panel-fed machinery where you need a hard disconnect without pulling the handle.
The interrupting ratings here are what separate this from a standard distribution breaker. At 240 V it clears 187 kA; at 415 V and 440 V it holds 121 kA; at 500 V it's 75.6 kA; and at 690 V it drops to 3.7 kA. That 187 kA figure at 240 V puts it in the high-fault category — useful downstream of a large transformer or on a bus with high available fault current. The 690 V rating is low, so if your line side runs at 690 V, this isn't the breaker for that spot.
Dimensions are 181 mm high, 105 mm wide, 86 mm deep — standard 3-pole MCCB footprint for a 100 A frame. It mounts on a DIN rail or can be screw-fixed to a backplate. The shunt trip adds a pair of control terminals; make sure your control voltage matches the release rating (not listed here, but typical for SENTRON shunt trips is 24 V DC or 230 V AC — verify against the specific release code).
Rated insulation voltage is 800 V, which covers most low-voltage industrial systems up to 690 V phase-to-phase. Power loss at rated current is 10 W maximum — negligible for panel thermal budgeting in a ventilated enclosure.