The Siemens SENTRON 3VA1163-1AA42-0KC0 is a 4-pole switch disconnector in MCCB design, rated for 63 A continuous current (Iu) with a maximum rated operational voltage of 690 V AC (50/60 Hz) and 600 V DC. It is built on the IEC frame 160 platform and ships with a shunt trip (STL) release for 220-250 V DC or 208-277 V AC, plus two HQ auxiliary switches. The main circuit connects via busbar front terminals.
This part is a pure switch disconnector — it provides no overload or short-circuit protection. The 2 kA short-time withstand rating (1 s and 0.5 s) defines its capability to carry fault current until an upstream protective device clears it, not to interrupt a fault itself. That makes it a load-break isolator for a panel's main incoming supply or a branch feeder where protection is handled separately. The shunt trip (STL) release allows remote tripping via a control signal, useful for emergency-stop circuits or interlocking schemes. Two HQ auxiliary contacts report the main contact position back to the PLC or status lamp. No undervoltage release is fitted, so a loss of control power will not automatically open the disconnector.
Panel footprint: 130 mm height, 101.6 mm width, 70 mm depth. The front terminal arrangement accepts busbar connections for the main circuit, which simplifies panel wiring in a multi-feeder distribution assembly. Front IP40 protection means it is suitable for enclosed panel mounting where the door or cover provides the environmental seal. Operating temperature range -25 °C to +70 °C covers most indoor industrial environments; storage range -40 °C to +80 °C. Maximum power dissipation is 38 W — plan for that heat load in a sealed enclosure with restricted natural convection.