What this MCCB does for your line
The Siemens SENTRON 3VA1010-3ED36-0CC0 is a 3-pole molded case circuit breaker rated for 100 A continuous current, with a TM210 thermal-magnetic release that handles overloads and short-circuits without external trip units. Its interrupting capacity hits 75.6 kA at 240 V and 52.5 kA at 415 V — enough to clear high-fault scenarios on distribution transformers or large motor branch circuits without cascading upstream. The 800 V rated insulation voltage means it's comfortable on 480/277 V or 600 V systems common in North American and European industrial panels. An undervoltage release (UVR) is built in, so the breaker trips automatically if supply voltage drops below a set threshold — useful for preventing motor restart after a brownout or for emergency stop circuits that need a mechanical latch drop. Two HQ auxiliary switches (form C) provide status feedback to a PLC or annunciator panel.
Thermal derating — what the numbers mean for a warm panel
The breaker carries its full 100 A from 40 °C up to 50 °C ambient. At 55 °C it derates to 96 A, at 60 °C to 94 A, at 65 °C to 92 A, and at 70 °C to 90 A. If your enclosure runs hot — say, a packed panel near a furnace or in a southern plant — size the load wiring and upstream protection for the derated value, not the nameplate 100 A. The IP40 front face keeps dust out of the mechanism but doesn't seal against washdown; mount it in a separate enclosure if the environment is wet or dusty.