The Siemens 3VA2010-5KQ46-0AA0 is a 4-pole SENTRON molded case circuit breaker rated for 100 A continuous current, designed for line protection duty. It carries a 187 kA interrupting capacity at 240 V and 121 kA at 415 V, so it handles high-fault scenarios typical in industrial distribution panels without needing an upstream current-limiting fuse. The 100 A rating holds steady across the full 40 °C to 70 °C ambient range — no derating curve to chase in a hot enclosure.
Interrupting capacity and what it means on the line
At 240 V this MCCB clears 187 kA symmetrical — that's the kind of fault current you see close to a large transformer secondary. At 415 V it still manages 121 kA, and at 500 V it's 75.6 kA. The 690 V rating drops to 3 kA, which tells you this breaker is sized for 240–500 V systems, not 690 V feeders. The 100 A continuous rating is flat from 40 °C all the way to 70 °C, so you don't lose capacity in a crowded panel — important when you're stacking breakers in a warm enclosure.
Ground-fault and communication features
This variant includes ground-fault monitoring via summation current formation on the L + N conductor — it watches for leakage between phase and neutral, not just phase-to-ground. It also has a communication function, so it can talk to a higher-level system for status or trip indication. No undervoltage release or voltage trip on this unit; it's a straight line-protection breaker with ground-fault and comms.
Panel fit
The breaker measures 181 mm tall by 140 mm wide and 86 mm deep. That's a standard SENTRON 3VA footprint — it mounts on a DIN rail or bolts directly into a panel baseplate. The 4-pole width (140 mm) is the same as other 3VA 4-pole frames, so it swaps into existing SENTRON cutouts without re-drilling.