The Siemens SENTRON 3VA1163-1AA42-0AC0 is a 4-pole switch disconnector in MCCB design, rated 63 A continuous across the full operating temperature range from 40 °C to 70 °C — no derating needed up to the maximum ambient. It is built on the IEC frame 160 platform and carries the SD100 designation, meaning it provides isolation and switching without overload or short-circuit protection. Maximum power loss is 38 W. Two HQ auxiliary changeover contacts are built in. Mechanical service life is 15 000 operating cycles typical.
Front terminals accept busbar connection for the main circuit. An optional motor drive can be added for remote switching.