The Siemens SENTRON 3VA2110-5HN32-0KC0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It's designed for line protection in distribution panels, switchboards, and motor control centers where you need a compact 105 mm wide footprint and a high interrupting capacity.
Interrupting capacity and selectivity
At 240 V this breaker clears 187 kA — that's the kind of number you need for high-fault utility feeds or transformer secondaries. At 415 V it still holds 121 kA, dropping to 75.6 kA at 500 V and 3.7 kA at 690 V. The 100 A frame with those interrupting ratings gives you solid selectivity headroom downstream; you can coordinate with smaller branch breakers without oversizing the main.
Built-in accessories and release options
This variant ships with two auxiliary switches (HQ type) and a shunt trip release (STL) factory-installed — no field retrofit needed. The shunt trip lets you remotely trip the breaker from an emergency stop or a protection relay, which saves panel space versus adding an external undervoltage release. Power loss is 10 W maximum, so thermal management inside a sealed enclosure is manageable.
Dimensions and panel fit
The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep — a standard SENTRON 3VA frame that fits most DIN-rail or panel-mount enclosures without surprises. The 86 mm depth is shallow enough for shallow backpanels; just verify the gland plate clearance if you're running cables behind the breaker.