What it is and what it does
The Siemens 3VA1116-1AA36-0DA0 is a SENTRON 3VA1 IEC frame 160 switch disconnector — a 3-pole, 160 A rated continuous current (Iu) device in MCCB-style construction, but without overload or short-circuit protection elements. Its job is to provide a visible break and safe isolation under load, not to protect downstream conductors. The integrated undervoltage release (UVR) coils in at 208–230 V AC 50/60 Hz, so if control voltage drops, the disconnector opens automatically — useful for emergency-off or interlock circuits where loss of control power should kill the load.
Key ratings and what they mean for fit
Rated continuous current Iu of 160 A sets the maximum uninterrupted current the disconnector can carry in free air without exceeding its thermal limits. That 160 A figure is the sizing anchor: the downstream load (motor, heater, distribution bus) must not exceed it. The max AC operational voltage is 690 V 50/60 Hz, and the max DC operational voltage is 500 V — so it works on 400 V three-phase panels and on 480 V DC bus systems. Rated insulation voltage Ui of 800 V gives headroom for surge coordination in industrial environments. Short-time withstand ratings are 2 kA at both 1 s and 0.5 s — that is the fault current the disconnector can survive closed without welding or damage. It is not a breaking capacity; the upstream protection (fuse or MCCB) must clear faults below 2 kA within those time windows to keep this device intact. Power loss at rated current is 38 W maximum — relevant for enclosure thermal design, especially in a sealed panel with multiple devices. Front IP40 means it is protected against tools and small wires poked at the front face, but not against water ingress; mount it in a suitable enclosure for wet or washdown areas.
Deployment context and integration
Panel-mount device with front terminal connections for the main circuit. Dimensions are 70 mm deep, 76.2 mm wide, 130 mm tall.
Lifecycle and sourcing reality
The lifecycle stage is marked as current — the manufacturer lists it as an active, in-production part.