What this part is — and what it isn't
The Siemens 3VA1116-1AA42-0AB0 is a SENTRON 3VA1 switch disconnector in a 160 A IEC frame, 4-pole, rated for 160 A continuous current (Iu). It is not a molded-case circuit breaker — it carries no overload or short-circuit protection elements. The product designation is switch disconnector, and the description confirms it ships without overload protection and without short-circuit protection. That means it functions as a manual load-break switch for isolation and disconnection, not as a protective device. Rated operational voltage goes to 690 V AC 50/60 Hz and 600 V DC.
What the ratings mean for fit
The 160 A rated continuous current (Iu) sets the maximum uninterrupted load this switch can carry — sized for a 160 A feeder or downstream isolation point. The 690 V AC / 600 V DC max operational voltage covers standard 400 V three-phase panels and many DC bus applications. The 4-pole configuration (3 phases + neutral) suits TN or TT systems where the neutral needs switching. The 2 kA short-time withstand at 1 s and 0.5 s is the rating for fault current let-through — this switch can hold closed under a fault long enough for an upstream breaker to clear, but it does not interrupt faults itself.
Panel integration and connections
Mounts in a standard 70 mm depth footprint — the depth, width (101.6 mm), and height (130 mm) match the 3VA1 frame 160 family. Main circuit connection is busbar connection via front terminals, so it lands directly on a busbar system without lug adapters. The auxiliary contact block carries 2 CO contacts (2 auxiliary switches HP) for status feedback to a PLC or indication lamp. IP40 on the front means it is protected against tools and small wires entering the front face — fine for enclosed panel mounting, not for washdown environments.