What this MCCB carries and where it fits
The Siemens SENTRON 3VA2110-5JP32-0HC0 is a 3-pole molded case circuit breaker rated for 100 A continuous current across the full ambient range from 40 °C through 70 °C — no derating needed up to that ceiling. Breaking capacity hits 187 kA at 240 V AC, 121 kA at 415 V and 440 V, then drops to 75.6 kA at 500 V and 3.7 kA at 690 V. That 187 kA figure at 240 V means it handles high-fault utility feeds or transformer secondaries where available short-circuit current is substantial; the 3.7 kA at 690 V still covers most industrial motor branch circuits at that voltage class. Designed for line protection, it includes a shunt trip release (STL) and a communication function — so it can be tripped remotely via a control signal and report status back to a PLC or BMS. The 10 W maximum power loss is modest for a 100 A frame; panel ventilation is still advisable in a sealed enclosure.
Dimensions and panel fit
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep. That 105 mm width is a standard 3-pole MCCB footprint for this current class — it occupies three 35 mm DIN-module positions if mounted on a DIN rail, or the equivalent cutout in a panel-mount adapter. The 86 mm depth includes the body and the rotary handle; allow clearance for cable bending radius behind the panel, especially with the shunt trip wiring and communication connector. No undervoltage release is fitted on this variant, so the shunt trip is the only auxiliary release — verify that matches your trip-coordination scheme.
Breaking capacity by voltage — the so-what
The 187 kA at 240 V is the headline number, but the real-world decision point is the 121 kA at 415 V — that is the common industrial distribution voltage in many markets. At 500 V the breaker still manages 75.6 kA, which covers most 480 V北美 panelboards. The steep drop to 3.7 kA at 690 V means this frame is not the right choice for 690 V systems with high fault current; for those, step up to a higher-rated 3VA frame. The 100 A continuous rating is flat from 40 °C to 70 °C, so no thermal derating calculation is needed in a warm cabinet — that is a genuine advantage over breakers that derate above 40 °C.