The Siemens 3VA1163-1AA42-0CC0 is a SENTRON 4-pole switch disconnector built in MCCB design, rated for 63 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed as the panel warms up. It handles 690 V AC (50/60 Hz) or 600 V DC, making it a straight fit for 400 V three-phase distribution and DC bus isolation in the same enclosure.
What the ratings mean for your panel
The 63 A rating is flat from 40 °C to 70 °C — no thermal derating curve to calculate. That simplifies BOM sizing for a warm cabinet or a line-side disconnect near a motor drive. Rated insulation voltage Ui of 800 V gives headroom above the 690 V AC operational maximum, so the switch suits 690 V systems without creeping along the insulation boundary. The front terminals accept busbar connection, which means it drops into a panel busbar system without extra adapters. IP40 on the front keeps finger probes out; the rest of the enclosure is the panel's own IP rating. Two auxiliary switches (HQ type) with 2 CO contacts are built in — enough to signal the switch position back to a PLC or safety circuit without an add-on block.
Undervoltage release and lifecycle
This unit ships with an undervoltage release (UVR) fitted. That means the switch trips automatically when control voltage drops below a threshold — standard for safety isolation on conveyor zones or machine sections where loss of control power should open the disconnect. Latching endurance is rated at 15 000 cycles, which covers years of daily switching in a material-handling line. The optional motor drive allows remote operation if the panel is hard to reach.
Sourcing and fit
Dimensions: 70 mm deep, 101.6 mm wide, 130 mm high. The width matches standard 4-pole MCCB footprints, so it should fit existing panel cutouts or DIN-rail layouts without re-drilling.