The 3VA2110-5JQ32-0BC0 is a SENTRON molded case circuit breaker configured for line protection, 3-pole, rated 100 A continuous from 40 °C through 70 °C with no derating across that span. The basic switch assembly carries order code 3VA21105JQ320AA0. Communication function is built in.
At 240 V this breaker interrupts 187 kA — that is the highest short-circuit current it can clear without welding or rupturing. At 500 V it drops to 75.6 kA, and at 690 V it is 3.7 kA. The steep roll-off above 500 V is typical for a 100 A frame; if your system runs 690 V you need to verify the available fault current is under that 3.7 kA threshold.
The 86 mm depth includes the case body; allow clearance for cable bends and the aux switch wiring. Max power loss is 12.5 W — negligible for panel thermal calculations at this frame size.