The Siemens 3VA1163-5GF42-0AH0 is a 4-pole IEC frame 160 molded case circuit breaker from the 3VA1 series, rated at 63 A with a breaking capacity of 55 kA at 415 V AC (class M). That 55 kA Icu means it can safely interrupt a fault current of that magnitude without welding its contacts or rupturing the case — critical for high-fault installations like industrial distribution panels or motor control centers where upstream transformer capacity is substantial. Protection is handled by a TM240 thermal-magnetic trip unit with adjustable overload (Ir) from 44 A to 63 A and short-circuit pickup (Ii) adjustable from 5 to 10 times In. The 100% N-conductor protection means the neutral pole is fully rated and protected, not just switched — a requirement for systems with high harmonic content or unbalanced loads where the neutral carries sustained current.
Panel Integration
The 3VA1 frame 160 mounts directly onto a DIN rail or panel-mount plate inside an enclosure. The nut keeper kit (included) secures the breaker in place without loose hardware — a time-saver during panel assembly. The two auxiliary switches HQ and one trip alarm switch HQ provide remote status feedback for PLC or SCADA monitoring.