The Siemens SENTRON 3VA2110-6HN32-0CA0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current at ambient temperatures up to 50 °C without derating — above that it steps down to 96.25 A at 55 °C and 85 A at 70 °C, so if your panel runs hot, size the load against the thermal curve, not the nameplate. Mounting dimensions are 105 mm wide by 181 mm tall by 86 mm deep — standard SENTRON 3VA2 footprint for a 100 A frame.
The ETU350 trip unit is field-configurable for long-time, short-time, instantaneous, and ground-fault pickup levels (though ground-fault monitoring isn't fitted on this variant, the trip unit supports it if you add the module). Power loss is 12.5 W maximum, so ventilation in a sealed enclosure is advisable if you're grouping several breakers.