Switch disconnector, not a breaker — what that means for the BOM line
The Siemens SENTRON 3VA1116-1AA42-0HH0 is a 4-pole switch disconnector in MCCB-style housing, rated 160 A continuous across the 40 °C to 50 °C band — no derating needed until 55 °C, where it drops to 158 A. It carries no overload or short-circuit protection elements, so it functions purely as a load-break disconnect for isolation and switching duty on 690 V AC or 600 V DC circuits. The shunt trip (STL) release accepts 12-30 V DC or 24 V AC 50/60 Hz for remote tripping, and the auxiliary switch block provides 2 HQ form-C contacts plus 1 trip alarm switch — three CO contacts total. Mechanical service life is 15 000 operating cycles typical.
Panel fit and integration — 101.6 mm wide, busbar connection
The 3VA1116-1AA42-0HH0 occupies a 101.6 mm wide by 130 mm tall by 70 mm deep footprint — standard for a 4-pole MCCB-style device on a DIN rail or mounting plate. Main circuit connection is via busbar with front terminals, so plan for busbar routing and front-access termination. IP40 on the front face means it is protected against tools and solid objects over 1 mm but not sealed against moisture; install inside a panel enclosure rated for the environment. Maximum power loss is 38 W, which should be factored into enclosure thermal calculations.