The 3VA2010-7JQ42-0AA0 is a Siemens 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 the panel's max operating temp. It's a 4-pole unit with a line-protection design, meaning it's built for feeder and distribution circuits, not motor-starting duty. The interrupting capacity hits 330 kA at 240 V and still holds 242 kA at 415/440 V, which puts it squarely in the high-fault-current segment for industrial switchgear.
Interrupting ratings and selectivity
This MCCB's interrupting capacity drops as voltage climbs: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3 kA at 690 V. That 3 kA figure at 690 V is the weak point — if your panel runs 690 V distribution with fault current above 3 kA, this breaker won't clear it. The 150–1,200 A adjustment range on the trip unit gives you selectivity headroom downstream; you can dial the pickup to coordinate with branch breakers without swapping the frame.
Ground-fault and communication
It includes ground-fault monitoring via summation current formation on L + N conductors — that's the residual-current approach that catches line-to-ground faults without a separate GFCI module. Communication function is built in, so it can talk to a BMS or SCADA for remote trip indication and load monitoring. No undervoltage release on this variant, so if you need UVR for a safety circuit, you'll want a different suffix.
Physical fit
Dimensions are 86 mm deep, 140 mm wide, 181 mm tall — that's a 3.39 x 5.51 x 7.13 inch footprint. It's a panel-mount MCCB, not DIN-rail snap-on, so you're bolting it into a distribution board or switchgear cubicle. The 4-pole width (140 mm) is standard for a 100 A frame; verify the mounting hole pattern against your existing bus bars before ordering.