The Siemens SENTRON 3VA1110-1AA36-0AD0 is a switch disconnector in a molded-case circuit breaker (MCCB) form factor, rated for 100 A continuous current (Iu) across three poles. It carries a maximum AC operational voltage of 690 V at 50/60 Hz and a DC rating of 500 V, with an insulation voltage (Ui) of 800 V. The part is designed as a manual load-break disconnect — no overcurrent protection, no short-circuit release — so it is specified where a visible break and safe isolation are needed, not where the device itself clears faults.
What the ratings mean for fit
The 100 A continuous rating sets the maximum load it can carry without exceeding thermal limits; the 38 W maximum power loss at that current is the heat you need to vent inside the enclosure. The 2 kA short-time withstand (1 s and 0.5 s) tells you this disconnect can pass fault current up to that level while the upstream breaker clears — it is not a breaking device itself. The 15 000-cycle mechanical endurance is typical for a switch disconnector in panel isolation duty; if your application needs frequent switching under load, the cycle count governs service life. The three built-in auxiliary switches (HQ type) give you status feedback — open/closed position — without needing separate limit switches. The front terminal connection (clamp type) accepts standard copper cable lugs; the IP40 front protection means it is suitable for a dry indoor panel but not washdown areas. Optional motor drive allows remote operation, but the base unit is manual-trip only.
Where it fits in a panel
The 3VA1 frame (76.2 mm wide, 130 mm tall, 70 mm deep) matches the standard SENTRON MCCB footprint for 160 A frame size. It mounts on a DIN rail or directly to a backplate via the integrated lugs. The front terminals are accessible with the panel door closed, so it works in a dead-front switchboard layout. Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C.