What this MCCB is and what the ratings mean for fit
The Siemens 3VA2110-5JP32-0KH0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection — meaning it sits on the feeder or main branch in a panel, not on a motor or a specific load. Rated 100 A continuous at up to 70 °C ambient (–), so it handles full current without derating across the typical panel temperature range. That 100 A holds from 40 °C to 70 °C, which is unusual — most breakers start derating above 40 °C. The 3-pole construction suits three-phase systems up to 690 V. Breaking capacity is the headline here: 187 kA at 240 V, 121 kA at 415 V and 440 V (–), 75.6 kA at 500 V, and 3.7 kA at 690 V. That 187 kA at 240 V is high — it tells you this breaker is sized for high-fault-capacity panels, likely downstream of a large transformer or in an industrial distribution board where the available fault current is substantial. At 690 V the capacity drops to 3.7 kA, so if your line-to-line voltage is that high, verify the fault current at that point doesn't exceed the rating. Power loss is 10 W maximum — that's the heat it dumps into the enclosure. For a 100 A MCCB that's reasonable; if you're packing several in a small panel, factor that into the thermal budget.
Auxiliaries and integration
This variant ships with 2 auxiliary switches plus 1 trip alarm switch (HQ) and a shunt trip release (STL). The shunt trip lets you remotely trip the breaker from a PLC or emergency-stop circuit — critical for safety circuits or remote disconnect. The trip alarm switch signals when the breaker has tripped on fault, not just when it's open. There's also a voltage trigger and a trip indicator for local status. Dimensions: 86 mm deep, 105 mm wide, 181 mm tall (–). That width is standard for a 3-pole MCCB in this class — fits a typical 3-pole DIN-rail or panel-mount footprint. The depth is shallow enough for most enclosures, but check the door clearance if you're mounting it in a deep panel with a cover. Operating temperature range is -25 °C to 70 °C (–); storage range is -40 °C to 80 °C (–). That covers most indoor industrial environments; if the panel sits outdoors in a cold climate, the storage minimum is fine, but the operating minimum of -25 °C is the hard limit for switching.
Lifecycle and sourcing reality
The 100 A continuous rating and 3-pole line-protection design confirm fit for this BOM line.