The Siemens 3VA1116-1AA32-0AA0 is a SENTRON 3VA1 switch disconnector in an MCCB-style housing, rated 160 A continuous at 40 °C through 50 °C, with a modest derating curve to 150 A at 70 °C. The designation SD100 means it provides switch-disconnector function per IEC 60947-3 — it makes, carries, and breaks current under normal conditions and, importantly, provides visible isolation for safe maintenance access. This variant ships with busbar connection on the front terminals and includes a nut keeper kit for secure busbar mounting.
Above 50 °C the curve is gradual — 158 A at 55 °C, 155 A at 60 °C, 153 A at 65 °C, 150 A at 70 °C — so in a warm enclosure near a drive or transformer you lose only 10 A at the top of the operating range (-25 °C to 70 °C). Mechanical service life is 15 000 operating cycles typical, adequate for infrequent isolation duties but not for daily load-break switching. Front protection is IP40 — it keeps tools and fingers out but is not sealed against washdown.