The Siemens 3VA1163-5MH32-0AC0 is a 3VA1 IEC frame 160 molded case circuit breaker with class M breaking capacity — Icu=55kA at 415 V AC, 3-pole, rated In=63 A. It carries starter protection TM120M, meaning the thermal-magnetic trip unit is set for motor-starting duty: the thermal element protects against overload, while the magnetic short-circuit pickup is adjustable Ii=5...15 x In. This breaker ships without overload protection (the TM120M provides it) and includes a nut keeper kit plus two HQ auxiliary switches for status feedback.
What the ratings mean for fit
The 55 kA Icu at 415 V means this breaker can safely interrupt a fault current up to that level without failing — critical for high-fault-capacity industrial panels where upstream transformers can deliver tens of kiloamps. The 63 A continuous rating (In) sizes it for motor circuits, feeders, or branch protection in that current band. The adjustable short-circuit pickup (5–15x In) lets you dial in the magnetic trip point to avoid nuisance tripping on motor inrush while still clearing hard faults — a common requirement for starter-protection breakers feeding pumps, compressors, or conveyors.
Panel integration
Mounts in a standard IEC frame 160 footprint — DIN-rail or screw-mount compatible depending on the accessory base. The nut keeper kit retains the terminal screws during wiring, saving time on repeated terminations. Two HQ auxiliary switches provide independent status signals (open/closed) for PLC or indicator-light feedback; no need for a separate aux block on the side.