What this MCCB carries — and what that means on the panel
The Siemens SENTRON 3VA1110-5EE32-0KA0 is a 3-pole molded case circuit breaker rated for 100 A continuous at 40 °C, with a thermal-magnetic trip unit (TM220) inside. That 100 A holds flat through 50 °C; above that it starts a gentle derating curve — 98 A at 55 °C, 96 A at 60 °C, down to 91 A at 70 °C. So if this lands in a hot panel near a drive or transformer, you're still carrying 91 A at the top of the operating range. Breaking capacity is the headline number here: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and it still holds 17 kA at 690 V. That's a serious fault-current rating — this breaker will interrupt a high-energy arc without cascading upstream, which matters for switchboard main or large feeder duty where the available fault current is in the 100 kA range. The auxiliary release is a shunt trip (STL) — meaning a remote signal (from a safety relay, E-stop circuit, or PLC digital output) can trip this breaker independently of the overcurrent protection. No undervoltage release on this variant, so it won't drop on power loss; it's a deliberate-remote-trip design.
DIN-rail footprint and panel fit
Dimensions: 130 mm tall, 76.2 mm wide (3 inches), 70 mm deep. That 70 mm depth is the key number for enclosure selection — it fits standard 200 mm deep enclosures with room for wiring gutters. Three-pole width at 76.2 mm means it occupies three 25 mm module spaces on the DIN rail, same as most 100 A frame MCCBs. Rated insulation voltage is 800 V, so it's suitable for 690 V line-to-line systems with margin. Power loss maxes at 25 W — that's the heat you need to account for in the panel thermal budget, especially if multiple breakers are ganged.