The Siemens 3VA1116-1AA46-0DC0 is a 4-pole switch disconnector in the 3VA1 IEC frame 160 series, rated at 160 A continuous current. It is configured as an SD100 — a disconnect switch without overload or short-circuit protection, meaning it provides visible isolation for a circuit but relies on upstream protective devices for fault interruption. The unit includes an undervoltage release coil rated 208-230 V AC 50/60 Hz and two auxiliary switches (HQ configuration) for status feedback to a PLC or panel indication.
What the ratings mean for fit
The 160 A rating is the continuous thermal current (Ith) for this frame size — it governs the maximum load the disconnect can carry without derating. Because it lacks overload protection, it is not a motor-protective device; use it strictly as a load-break switch or isolator where the downstream circuit has its own overcurrent protection. The undervoltage release trips the switch when control voltage drops below the dropout threshold, which is typical for emergency-stop or undervoltage-protection schemes in machine-tool or conveyor applications. The two auxiliary switches provide electrically isolated NO/NC contacts for remote status monitoring.
Integration notes
Clamp-type terminals accept copper conductors without lug crimping — strip length and torque per the terminal marking on the device. The 4-pole configuration (3 poles + neutral) suits TN or TT systems where the neutral must be switched. Mounts on a DIN rail or panel baseplate within the 3VA1 frame footprint; allow clearance above and below for the undervoltage release coil and auxiliary switch wiring.