What this MCCB carries for a 100 A feeder
The 3VA1110-3EF36-0HH0 is a SENTRON molded case circuit breaker from Siemens, designed for line protection in distribution panels. It's a 3-pole unit rated 100 A continuous at 40 °C, with no derating needed up to 50 °C — at 55 °C it still holds 98 A, and at 70 °C it carries 91 A. That thermal curve means you can run it near full nameplate in a warm enclosure without upsizing the frame. Interrupting capacity is the headline here: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at 500 V or 690 V. That's a high-interrupting frame for a 100 A breaker — you can place it downstream of a large transformer or on a high-fault bus without worrying about cascading failure. The 800 V rated insulation voltage backs up the 690 V interrupting numbers.
Auxiliaries and integration
This variant ships with a shunt trip (STL) release and a complement of auxiliary switches: two auxiliary switches plus one trip alarm switch (HQ). That gives you remote tripping capability and status feedback without adding external relays. The shunt trip lets a PLC or safety relay kill the breaker on demand — handy for emergency-stop circuits or remote disconnects. Dimensions are 70 mm deep, 76.2 mm wide, 130 mm tall. That 76.2 mm width is a standard 3-pole MCCB footprint — it'll drop into most panel layouts without re-drilling the backplate. Power loss is 25 W maximum, so factor that into your enclosure heat budget if you're stacking several breakers in a sealed box.