The Siemens 3VA1163-1AA32-0JA0 is a SENTRON 3VA1 switch disconnector in MCCB design, rated 63 A continuous current with no derating across the full operating temperature range from 40 °C to 70 °C — meaning it holds its full 63 A rating even in a warm enclosure or high-ambient panel without needing to downsize. It is a 3-pole, non-fused disconnect intended for isolation and switching duty, not for overload or short-circuit protection (no trip unit, no overload release). The built-in shunt trip (STL) release operates on 110–127 V DC or AC 50/60 Hz, allowing remote emergency-off or controlled disconnection from a PLC or safety relay output.
Mechanical endurance is 15,000 operating cycles — typical for a switch disconnector in this frame size. Maximum power loss is 38 W, which matters for enclosure heat load calculations if multiple units are ganged.
Deployment context
Mounts on a DIN rail or panel via the 3VA1 frame footprint (130 mm height, 76.2 mm width, 70 mm depth) and connects via busbar or front terminals — common in Siemens SENTRON distribution boards and MCCB-style switchgear. The shunt trip release makes it a natural fit for safety circuits requiring remote disconnect, such as emergency-stop chains or controlled isolation in automated machinery.