It snaps onto a DIN rail in a standard panel enclosure — one width unit (18 mm) per pole, so this single-pole breaker takes up exactly one module.
Breaking capacity — what each standard means
This breaker carries three breaking-capacity ratings, and which one governs depends on the standard your panel is designed to. Under EN 60898 it's rated 4.5 kA — that's the residential / light-commercial benchmark. Under IEC 60947-2 it's 6 kA, the industrial standard for branch-circuit protection. And for UL 1077 / CSA C22.2 No. 235 it's 5 kA, which matters if the panel ships into a North American jurisdiction that recognizes supplementary protectors.
Width is 18 mm (one DIN module). The breaker accepts top and bottom combined terminals — wire up clean without needing separate feed-through lugs. It's sealable (lockable in the off position) for lockout/tagout. IP20 with conductors connected — standard for inside the enclosure, not for wet locations.
Halogen-free and silicon-free construction, so it won't outgas corrosive compounds in a sealed panel. Pollution degree 3, overvoltage category III — suitable for industrial environments where the breaker sees transient surges from upstream distribution.