Switch Disconnector with Undervoltage Release — SENTRON 3VA1 Frame 160
The Siemens 3VA1163-1AA36-0CA0 is a 3-pole switch disconnector in the SENTRON 3VA1 family, built in an MCCB-style housing rated for the IEC frame 160. It carries a continuous current rating of 63 A that holds flat across the entire operating temperature range from 40 °C to 70 °C — no derating curve to manage, which simplifies panel thermal budgeting for a 63 A load-break position. Rated operating voltage is 690 V AC and 500 V DC, with an insulation voltage of 800 V. The front-terminal connection accepts lug or clamp terminations for the main circuit, and the unit mounts on a DIN rail in a standard 70 mm depth × 76.2 mm width envelope — a direct fit into existing SENTRON 3VA panel layouts.
Undervoltage Release — UVR 120–127 V AC
This variant ships with an integrated undervoltage release (UVR) rated for 120–127 V AC, 50/60 Hz. The UVR trips the disconnector open when the control voltage drops below the dropout threshold, providing loss-of-voltage protection for downstream loads — a standard requirement for safety isolation in conveyor, pump, and machine-tool circuits where an unexpected restart after a voltage dip must be prevented. No auxiliary contacts are fitted on this order code; the UVR is the only auxiliary release. The UVR does not include a leading contact, so the release operates directly on the undervoltage condition without a time-delay or make-before-break auxiliary. For applications needing a motor-drive option, the product extension for an optional motor drive is available, though it is not included at this order-code level.