What this breaker is and what the ratings mean for your panel
The Siemens 3VA1180-4GE42-0AA0-ZD00 is a 4-pole IEC frame 160 molded case circuit breaker with a breaking capacity class S rating of 36 kA at 415 V. That 36 kA Icu means it can safely interrupt a fault current up to that level without welding its contacts or rupturing the case — critical for ensuring the upstream transformer or bus can feed a short without taking the whole panel down. The thermal-magnetic trip unit (TM220, ATFM) gives you an adjustable overload protection band from 56 A to 80 A (Ir) and a fixed short-circuit pickup at 10 x In (800 A). The 100% N conductor protection means the neutral pole is fully rated, not derated — important for 4-wire systems where neutral harmonics can drive current above phase levels.
Deployment context
Mounts on a DIN rail or panel-mount base in a standard IEC enclosure. The 4-pole configuration suits three-phase plus neutral distribution in industrial switchboards, motor control centers, or OEM power panels. The nut keeper kit for DC Power OEM in China indicates this variant is pre-configured for DC-side applications — verify the DC voltage rating against your system before specifying.