Switch disconnector for isolation and switching duty
The Siemens 3VA1116-1AA42-0BH0 is a 4-pole switch disconnector from the SENTRON 3VA1 family, rated for 160 A continuous current (Iu) with a 70 mm depth, 101.6 mm width, and 130 mm height. It is designed for isolation and safe disconnection under load in industrial panels, not for overload or short-circuit protection — it carries no overcurrent release. The busbar connection on the front terminal suits it for fixed distribution boards where a dedicated disconnect point is needed ahead of downstream protection.
Undervoltage release and auxiliary contacts onboard
This unit ships with an integrated undervoltage release (UVR) rated for 24 V DC, which automatically opens the disconnector when control voltage drops below the dropout threshold — a common requirement for emergency-stop or power-loss safety chains. It also includes 2 auxiliary switches (HQ type) and 1 trip alarm switch, giving 3 CO contacts total for status feedback to a PLC or indication lamp. The auxiliary contacts are wired separately from the main circuit, so they can be used for remote status without interfering with the power path.
Rated for 690 V AC and 600 V DC isolation
Rated for 690 V AC and 600 V DC maximum operational voltage, with an insulation voltage of 800 V. IP40 on the front keeps tools out.