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.
Ratings and what they mean for fit
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). So if your panel ambient stays under 50 °C, you get the full 100 A; above that, you need to account for the drop. 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. That 75.6 kA at 415 V is well above typical utility fault levels in most industrial installations — gives you selectivity headroom without needing a current-limiting fuse upstream. Rated insulation voltage Ui is 800 V, so the breaker is rated for the insulation stress on 690 V systems — common in mining, marine, or heavy industrial where 690 V distribution is standard. 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. It comes with a shunt trip (STL) integrated — part number 3VA9688-0BL33 — for remote tripping via a control signal. Also includes 2 auxiliary switches plus 1 trip alarm switch (HQ configuration), so you get status feedback and alarm indication without adding external relays.
Physical fit and panel integration
Dimensions: 70 mm deep, 101.6 mm wide, 130 mm tall. That's a standard 4-pole MCCB footprint — mounts on a DIN rail or directly to a backplate via the screw terminals. 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. Front protection is IP40 — suitable for general indoor panel use where no washdown or dust ingress is expected. Storage temperature range is -40 °C to 80 °C, operating range -25 °C to 70 °C.