The Siemens 3VA1110-1AA36-0HA0 is a SENTRON switch disconnector in a 3VA1 IEC frame 160, rated for 100 A continuous current (Iu) across three poles. This is a pure disconnect — no overload or short-circuit protection built in, so it's specified as a manual load-break switch or isolator, not a circuit breaker. The integrated shunt trip (STL) accepts 12-30V DC or 24V AC 50/60 Hz for remote tripping, which is the main interface for emergency-off or supervisory control circuits.
Key ratings and what they mean for fit
Rated continuous current Iu is 100 A — this is the thermal current the main contacts carry continuously without exceeding the 70 °C maximum operating ambient. The 800 V rated insulation voltage (Ui) and 690 V AC / 500 V DC maximum operational voltage (Ue) define the system voltage it can safely isolate. Short-time withstand current is 2 kA at both 0.5 s and 1 s — that's the fault current the closed contacts can tolerate without welding, relevant for coordination studies where upstream protection clears a fault before the disconnect opens. Power loss is 38 W maximum at rated current — a figure to check for enclosure thermal rise, especially in a sealed panel. Front protection is IP40, meaning tool-accessible terminals only; the body is not sealed against washdown. Operating temperature range is -25 °C to +70 °C, storage from -40 °C to +80 °C.
Panel integration
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a compact 3-pole footprint that fits standard DIN-rail or panel-mount layouts for IEC frame 160 devices. Main circuit connections are front terminals with clamp-type (screw) termination, so wiring access is from the front without side clearance. The shunt trip coil is wired separately; no auxiliary contacts are included (0 CO contacts), so if status feedback is needed, an external auxiliary switch block must be added.