What this part is and what it does
The Siemens 3VM1116-5EE46-0AA2 is a 4-pole molded case circuit breaker in the 3VM1 series, built on an IEC frame 160. It's rated 160 A continuous (In) with an adjustable thermal overload pickup (Ir) from 112 A to 160 A, and a fixed magnetic short-circuit trip set at 10 times In (Ii = 1600 A). The breaking capacity hits 55 kA at 415 V AC — that's class M in the Siemens system, meaning it handles medium-level fault currents common in industrial distribution panels without needing an upstream current-limiting fuse.
Where it fits in the panel
This breaker bolts into a standard IEC distribution board or a motor control center bucket. The frame 160 footprint is compact enough for a 4-pole unit to squeeze into a 600 mm wide panel section, leaving room for cable glands and busbar connections. The N conductor is unprotected on this variant — that's the "N conductor unprotected" flag in the description — so plan for a separate neutral bar or a 4-pole breaker with a protected neutral if your local code demands it.
What the ratings mean for a field swap
If you're swapping this into an existing panel, the 160 A frame and the 55 kA interrupting rating at 415 V mean it can replace most medium-duty IEC breakers of the same size without re-calculating the SCCR downstream — as long as the existing buswork and cable are rated for 160 A. The adjustable Ir (112–160 A) lets you fine-tune the overload protection to match the actual load without changing the breaker body, which is handy when the motor FLA doesn't exactly match a standard trip unit.