What this part is and what it does
The Siemens SENTRON 3VA1116-1AA36-0BC0 is a 3-pole switch disconnector built in an MCCB-style frame — the 3VA series IEC frame 160 — rated for a continuous current of 160 A. It provides visible isolation and safe disconnection under load, but it carries no overload or short-circuit protection: this is a dedicated disconnect, not a circuit breaker. The 160 A rating means it can handle the full rated current of a motor feeder or distribution branch without nuisance tripping, since there is no thermal or magnetic trip element to coordinate.
Key ratings and what they mean for fit
Rated insulation voltage Ui is 800 V, and the maximum operational voltage is 690 V AC 50/60 Hz or 500 V DC. That covers standard 400 V and 480 V industrial systems with headroom. The part is equipped with an undervoltage release (UVR) rated for 24 V DC — if the control voltage drops, the disconnector opens, which is a standard safety lockout feature for emergency-stop circuits or undervoltage protection schemes. It also includes 2 HQ auxiliary contacts (changeover), so you get status feedback without adding a separate aux block. The IP40 front protection means it's suited for enclosed panel mounting — not for washdown or outdoor exposure.
Panel integration and wiring
The 3VA frame shares a 70 mm depth, 76.2 mm width, and 130 mm height with other 3VA1 devices. Front terminal connections for the main circuit use clamp-type terminals — no lug crimping required. The two HQ auxiliary switches are factory-fitted and wired to the same terminal block. The undervoltage release coil is 24 V DC; verify polarity and that the control supply is stable — a dip below dropout voltage will open the disconnector. Operating temperature range is -25 °C to +70 °C, storage from -40 °C to +80 °C.