The Siemens SENTRON 3VA1116-1AA42-0CC0 is a 4-pole switch disconnector in the 3VA1 series, built on the 160 A frame size. It's rated for a continuous current of 160 A and carries a rated insulation voltage of 800 V, with a maximum operational voltage of 690 V AC and 600 V DC. This isn't a circuit breaker — it provides no overload or short-circuit protection. It's a straight disconnect and isolate device, meant for applications where you need to manually break the circuit for maintenance or safety isolation. This unit ships with an undervoltage release (UVR) rated for 120-127 V AC 50/60 Hz, plus two form-C auxiliary switches (HQ type). The UVR will trip the disconnector open if the control voltage drops below its dropout threshold — a common requirement for safety circuits and emergency-stop chains in industrial panels. The auxiliary switches give you status feedback (open/closed) back to the PLC or indication lamp.
What the ratings mean for fit
The 160 A continuous rating (Iu) is the key selection number — this disconnector is sized for feeder circuits or load groups drawing up to that current continuously. The 800 V rated insulation voltage (Ui) means the internal clearances and creepage distances are designed for 800 V systems, so it's fine for 400 V, 480 V, and 690 V networks. The 2 kA limited short-time rating (1 s and 0.5 s) tells you it can withstand a short-circuit current of 2 kA for those durations without welding or damage, but it's not rated to interrupt a fault — upstream protection (a fuse or MCCB) must clear the fault before the disconnector's thermal limits are exceeded. The IP40 front protection means it's protected against tools and wires >1 mm from the front face, but not against water ingress — mount it inside a panel or enclosure, not out in a washdown area. The operating temperature range of -25 °C to 70 °C covers most indoor industrial environments, including unheated warehouses in cold climates. Max power loss of 38 W is the heat it dumps into the panel at full rated current — factor that into your enclosure thermal calculations if you're packing several of these side by side.
Panel integration and connection
The main current circuit connects via busbar connection on the front terminals — no lug terminals here. That means it's designed to bolt directly onto a busbar system (like Siemens 8US or similar), not for individual cable lugs. The front-terminal arrangement gives you good access for busbar links and jumper bars in multi-pole assemblies. The 4-pole design (3 phases + neutral) makes it suitable for three-phase four-wire systems where you need to switch the neutral as well. Dimensions are 70 mm deep, 101.6 mm wide, and 130 mm tall. The width is the key panel-space number — at roughly 4 inches, it's wider than a standard 3-pole MCCB of the same frame, so check your DIN-rail or mounting-plate layout before committing. The nut keeper kit is included per the description, which helps with busbar connection alignment during assembly.
Lifecycle and sourcing
For BOM-lock or MRO planners: this is a clean, active line item. No successor cross-reference needed — you can source it against an RFQ through independent distribution, with current pricing and availability confirmed at quote time. The UVR voltage (120-127 V AC) is a common control voltage in North American and some European panels; if your control voltage differs, Siemens offers UVR variants for other ranges within the 3VA accessory family.