Breaking capacity is 6 kA per EN 60898 and 30 kA per IEC 60947-2 — the higher figure matters when the breaker sits upstream in an industrial panel where fault current can exceed 10 kA; the 30 kA rating under 60947-2 gives you the headroom for that scenario.
Temperature derating and enclosure fit
Rated 1.6 A at 35 °C, the breaker derates to 1.54 A at 40 °C, 1.5 A at 45 °C, 1.47 A at 50 °C, and 1.44 A at 55 °C. If the panel ambient runs at 50 °C, the continuous load per pole must stay under 1.47 A — the C-curve magnetic trip threshold shifts with temperature too, so don't treat the 35 °C figure as the operating limit. Depth is 76 mm with an installation depth of 70 mm; the 72 mm width (4 MW) fits standard 18 mm-per-module DIN-rail enclosures.
This is an active, current-production SENTRON MCB.