The Siemens SENTRON 3VA1010-4ED42-0KH0 is a 4-pole molded case circuit breaker (MCCB) rated for 100 A continuous current, with a breaking capacity of 121 kA at 240 V AC and 75.6 kA at 415 V AC — that's the kind of fault-clearing headroom you want on a main feeder or a high-capacity distribution panel where a bolted fault could dump serious energy.
Rated continuous current Iu is 100 A, and it holds that rating from 40 °C up to 50 °C without derating — only starts to taper at 55 °C (96 A), 60 °C (94 A), 65 °C (92 A), and 70 °C (90 A). Breaking capacity varies by voltage: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. The overcurrent release is a TM210 thermal-magnetic type — fixed thermal and magnetic settings, no electronic adjustment. That's a workhorse choice for standard feeder or branch protection where you don't need the programmability of an electronic trip unit.
The 101.6 mm width (4 inches) is the same as many other 4-pole 100 A MCCBs, so it should drop into existing panel layouts without re-drilling.