The A9F68150 is a 1-pole Acti9 iT60N miniature circuit breaker rated 50 A with a C-curve magnetic trip at 8 x In (±20 %). The C-curve means it holds through moderate inrush — typical for mixed lighting and small motor loads — and trips fast on hard faults. The 36 kA Icu at 12-60 V AC (EN/IEC 60947-2) is the interrupting capacity you'd see in a high-fault panelboard; the 10 kA Icn at 230 V (EN/IEC 60898-1) is the domestic/commercial rating. Dual certification to both standards means it qualifies for either distribution board or industrial panel duty, depending on which standard your inspector calls out. At 50 A, the magnetic pickup is 8 x In (±20 %). The 18 mm width per pole (2 x 9 mm pitches) occupies one DIN rail module.
Deployment context
The removable comb busbar (listed as mounting mode) lets you daisy-chain multiple poles without extra wiring — common in distribution boards where you feed several single-pole breakers from one bus. Terminals accept 1-35 mm² rigid or 1-25 mm² flexible copper. Strip length 14 mm. That 35 mm² top end covers a 50 A feeder on 6 AWG or 10 mm² — plenty for the rated current.