What this 4-pole 100 A MCCB delivers
The Siemens SENTRON 3VA2010-8JQ42-0AA0 is a 4-pole molded case circuit breaker rated for 100 A continuous current (Iu) across the full ambient range from 40 °C to 70 °C — no derating needed up to the top of its operating band. That flat thermal curve is unusual for an MCCB this size; most competitors start rolling back above 50 °C. The interrupting ratings climb to 440 kA at 240 V, 330 kA at 415 V, and still 53 kA at 690 V, which puts it in the high-fault-current class for large transformer secondaries or bus-tie positions. The ETU560 electronic trip unit gives you adjustable long-time, short-time, instantaneous, and ground-fault protection — the ground-fault monitoring uses summation current formation on L + N, and the N-conductor protection is adjustable from OFF through 20% to 100% of the phase setting.
Selectivity and coordination headroom
With 440 kA at 240 V and 330 kA at 415 V, this breaker sits above typical 100 A frame ratings. That headroom matters when you're coordinating downstream branch breakers — you want the upstream device to hold in under fault until the downstream clears. The ETU560's adjustable short-time delay (tr min 0.5 s, tr max 25 s) gives you the time-band to achieve full selectivity with downstream 18 kA or 25 kA MCCBs. Same genuine part, different passport — the 3VA platform is the same hardware whether it shipped from a European or Asian Siemens factory.