What it is and what it does
The Siemens SENTRON 3VA1116-1AA42-0AG0 is a 4-pole switch disconnector in an MCCB-style housing, rated 160 A continuous at 50 °C — no overload or short-circuit protection built in, just a straight disconnect for isolation and switching duty. Rated 690 V AC and 600 V DC, insulation voltage 800 V. The 160 A rating holds flat from 40 °C through 50 °C, then tapers to 150 A at 70 °C — useful to know if the panel runs hot near the top of the enclosure.
Mounting and integration
It's designed for busbar connection on the front terminals — no screw-clamp lugs for cable tails, so plan for a busbar system or adapters if you're wiring in loose conductors. Dimensions are 70 mm deep, 101.6 mm wide, 130 mm tall — the 4-pole width is about 4 inches, which is standard for this frame size on DIN-rail or panel-mount backplates. IP40 on the front means it's splash-proof from the panel face but not sealed; keep it inside a cabinet unless you add an IP65 cover.
Built-in auxiliaries
Comes with one auxiliary switch and one trip alarm switch (HP type) as standard — two CO contacts total for status feedback to a PLC or indicator lamp. No undervoltage release or shunt trip fitted from the factory; those are optional add-ons if you need remote trip capability.
Mechanical and environmental limits
Rated for 15 000 mechanical operating cycles — typical for a disconnect switch in a panel that sees occasional isolation rather than daily motor starting. Operating temperature range -25 °C to 70 °C, storage from -40 °C to 80 °C, so it's fine for most indoor industrial environments including unheated warehouses. Max power dissipation is 38 W at full load — factor that into the enclosure thermal budget if you're packing several units in a small cabinet.