The Siemens 3VA1010-3ED42-0AA0 is a 4-pole molded case circuit breaker from the SENTRON series, rated 100 A continuous at 40 °C and carrying a TM210 thermal-magnetic release. The 75.6 kA interrupting rating at 240 V gives headroom for high-fault utility feeds; at 415 V it still breaks 52.5 kA, and at 690 V it holds 7.5 kA.
The 100 A rating holds flat from 40 °C to 50 °C, then derates to 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. If the enclosure ambient runs hot — say a crowded panel near a furnace line — you lose about 9 % of capacity at the top end. The footprint is 70 mm deep by 101.6 mm wide by 130 mm tall, which is the standard 4-pole SENTRON 3VA1 frame.
What's on the nameplate and what isn't
The trip indicator is absent, so you won't get a visual flag on the front when it trips; you'll need to check the handle position or add an auxiliary contact if remote status is required.