What it is and what it does
The SENTRON 3VA1116-1AA46-0LH0 is a 4-pole switch disconnector in the 3VA1 IEC frame 160 series, rated at 160 A without integral overload or short-circuit protection. It is designed for manual isolation and switching of loads in distribution panels where the upstream protective device handles fault interruption. The unit includes a 24 V DC universal release (UNI) for remote tripping, plus two HQ auxiliary switches and one HQ trip alarm switch for status feedback to a PLC or indication circuit.
Key ratings and what they mean for fit
The 160 A continuous rating on the IEC frame 160 means this disconnector carries the full load current of a feeder or large motor circuit without derating in a 40 °C ambient. The 4-pole configuration switches all three phases plus neutral — required for TN-S or TN-C-S systems where the neutral must be isolated during maintenance. The 24 V DC universal release allows integration with a safety circuit or emergency-stop chain; it pulls the main contacts open when the DC supply is interrupted, so a loss of control power also opens the disconnector.
Where it fits in the panel
Mounts on a DIN rail or direct to the panel backplate via the 3VA1 frame's integral fixing points. The clamp connection terminals accept copper conductors up to the frame's rated cross-section — no lug crimping needed for the main circuit. The two HQ auxiliary contacts and the trip alarm switch are pre-wired to terminal blocks on the front face, simplifying panel wiring and reducing the chance of mis-wiring the status signals.