What this part is — and isn't
The Siemens SENTRON 3VA1116-1AA32-0KC0 is a 3-pole switch disconnector in an MCCB-style housing, rated for 160 A continuous without overload or short-circuit protection. That distinction matters: this is a load-break disconnect, not a circuit breaker. It isolates a circuit under load but does not trip on overcurrent — the protection downstream (fuses or a breaker) handles that. The shunt trip (STL) allows remote opening via a control signal at 220–250 V DC or 208–277 V AC, and the two HQ auxiliary switches report the main contact position back to the PLC or panel indication.
Current rating — flat across the working range
The 160 A rating holds flat from 40 °C through 50 °C, then derates smoothly to 150 A at 70 °C. That means in a typical 40 °C panel environment you get full nameplate capacity; no need to oversize for a warm cabinet unless ambient exceeds 50 °C. The 38 W maximum power loss at rated current is manageable for a 3-pole disconnect in a standard enclosure — plan for ventilation if multiple units are ganged.
Panel fit and connections
The 76.2 mm width (3-inch footprint) matches the standard 3-pole MCCB cutout in most panel layouts. Depth is 70 mm, height 130 mm. Main circuit connection is via busbar — front terminal arrangement — so it is designed for horizontal busbar systems common in distribution boards. The auxiliary switch block (2 CO contacts) and shunt trip are factory-integrated; no add-on modules to source separately. IP40 on the front face is standard for enclosed panel mount — not rated for washdown or outdoor exposure.