The Siemens SENTRON 3VA1112-1AA32-0JC0 is a 3-pole switch disconnector in the 3VA1 IEC frame 160, rated for 125 A continuous current (Iu) with a max rated operational voltage of 690 V AC 50/60 Hz and 500 V DC. That shunt trip lets you remote-trip the disconnect from a safety PLC or E-stop string, which is what you want when the line-down condition demands positive isolation, not just a contactor drop.
Mechanical footprint is 130 mm high, 76.2 mm wide, 70 mm deep — the standard 3VA1 frame size. Front-terminal busbar connection for the main circuit; the shunt trip and auxiliary switches are factory-installed and wired. IP40 front protection means it handles panel-side dust and incidental touch, but it is not sealed against washdown — keep it inside the enclosure.