Switch disconnector for isolation duty
The Siemens 3VA1163-1AA36-0AH0 is a SENTRON 3VA1 IEC frame 160 switch disconnector rated for 63 A continuous current without overload or short-circuit protection — it is a pure isolation and switching device, not a circuit breaker. Three poles, front terminal clamp connections, and a 70 mm depth footprint that matches the rest of the 3VA1 family. The 38 W maximum power loss at rated load is the heat you need to clear inside the enclosure.
What the ratings mean for fit
Rated 63 A continuous (Iu) with an insulation voltage of 800 V — the gap between the 63 A load rating and the 800 V insulation class tells you this is built for industrial panel isolation where the load current is well below the voltage standoff capability. Max AC operational voltage is 690 V at 50/60 Hz; DC side is rated to 500 V. The 2 kA short-time withstand at 1 s and 0.5 s confirms it can sit upstream of a branch circuit without self-destructing during a fault — but it is not a breaker, so the downstream protection must clear the fault.
Auxiliary contacts and integration
Comes with 2 auxiliary switches and 1 trip alarm switch, all HQ type (high-rupturing-capacity contacts for control circuits). That is three CO contacts total, wired through the front terminal arrangement. The trip alarm switch signals the open state — useful for remote status monitoring on a panel door or PLC input. The IP40 front protection means it is suited for enclosed panel mounting, not open washdown areas.
Panel fit and environment
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth — the 3VA1 family shares this footprint, so a panel cutout or DIN-rail layout designed for a 3VA1 MCCB accepts this switch disconnector without re-drilling. Operating temperature range -25 °C to +70 °C; storage from -40 °C to +80 °C. The 38 W heat dissipation at full load must be factored into the enclosure thermal budget — for a sealed panel with no fan, that is roughly 130 BTU/h to reject.