What ships in the carton — kit completeness check
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. It ships with an undervoltage release (UVR) and two HQ auxiliary switches fitted. The basic switch assembly carries order code 3VA21105JQ320AA0. Communication function is built in. No trip indicator on the front face — fault indication comes through the aux switches or comms.
Breaking capacity by voltage — what the ratings mean for your fault level
At 240 V this breaker interrupts 187 kA — that is the highest short-circuit current it can clear without welding or rupturing. At 415 V and 440 V it holds 121 kA. 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.
Panel fit — dimensions and integration
The breaker measures 105 mm wide, 181 mm tall, 86 mm deep. That 105 mm width is a standard 3-pole MCCB footprint — it occupies three 35 mm DIN-rail modules plus a sliver. The 86 mm depth includes the case body; allow clearance for cable bends and the aux switch wiring. Rated for -25 °C to 70 °C operating ambient, -40 °C to 80 °C storage. Max power loss is 12.5 W — negligible for panel thermal calculations at this frame size.