MCCB for line protection — 100 A, 3-pole, with shunt trip
The Siemens SENTRON 3VA1110-5EE32-0HC0 is a 3-pole molded case circuit breaker rated for 100 A continuous current at 40 °C ambient, with a breaking capacity of 187 kA at 240 V AC.
Current derating and thermal profile
Above that, it derates linearly: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. The maximum power loss is 25 W. For a panel builder laying out a gland plate near a steam line or a VFD cabinet, that derating curve means the 3VA1110-5EE32-0HC0 holds its rating in most ventilated enclosures, but if the ambient inside the panel pushes past 50 °C — common when a press controller shares space with heat-generating contactors — the load must be trimmed to match the curve.
The interrupting rating drops with system voltage: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500 V and 690 V. That 17 kA floor at 690 V is the limiting case for high-voltage industrial networks.