The Schneider Electric EZ9F53116 is a 1-pole Easy9 miniature circuit breaker rated 16 A with a C-curve trip characteristic. It clips onto a DIN rail for distribution panel mounting and carries a 3 kA breaking capacity at 230 V AC, certified to SANS 60947-2. The thermal-magnetic trip unit gives it the standard C-curve response — magnetic trip at 8.5 x In (±20%) — so it handles moderate inrush from lighting or small motor loads without nuisance tripping, but clears a hard short fast.
The Ics is the same 3 kA at 100% of Icu. Limitation class 3 per SANS 60947-2 means this breaker limits fault current within the first half-cycle.
Clip-on DIN rail mount, 18 mm per pole (1 module wide). Tunnel terminals accept 1 to 25 mm² rigid or flexible — that's big enough for a 16 A feed from a 4 mm² cable, with room for daisy-chaining. The grey (RAL 7035) housing is standard for distribution boards. IP20 finger-safe terminals once installed.