What this MCCB is and what it protects
The Siemens SENTRON 3VA2010-6HN32-0KH0 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 is designed for line protection in distribution panels, meaning it guards cables and busbars against overload and short-circuit, not a specific motor or load. The 242 kA breaking capacity at 240 V and 187 kA at 415 V gives it the interrupting muscle for high-fault installations like transformer secondaries or main feeders. At 690 V the rating drops to 3 kA, so this is not a 690 V main breaker — keep it on the 240–500 V side for full fault-clearing capability.
Built-in accessories and what they mean for panel wiring
This variant ships with a shunt trip (STL) and a complement of auxiliary switches: two auxiliary contacts plus one trip-alarm switch (HQ). The shunt trip lets a remote signal — from an E-stop, fire alarm, or PLC safety output — open the breaker electrically without someone at the handle. The auxiliary switches report the breaker's open/closed state back to a control system, and the trip alarm flags that it opened on a fault, not manually. No undervoltage release is fitted, so if you need UVR for a motor starter interlock, this is not the order code. The power loss at rated current is 13.5 W, which is modest for a 100 A frame — panel thermal rise stays manageable in a standard enclosure.
Physical fit and environmental limits
Dimensions are 181 mm high, 105 mm wide, 86 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures sized for 100 A frames. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. No communication module or ground-fault monitoring is built in; this is a straight thermal-magnetic or electronic trip unit for line protection only. The trip indicator and voltage trigger are present, giving visual and electrical confirmation of a trip event.