The 6 kA Icn at 230 V AC (per EN/IEC 60898-1) is the service breaking capacity for most residential and light commercial panels; the 10 kA Icu (per EN/IEC 60947-2) covers industrial back-up applications where a higher interrupting rating is needed for coordination with upstream devices.
The C-curve (5–10 × In) means the magnetic trip holds through inrush from small motors, transformers, or capacitive loads up to about 130 A peak before instantaneously opening. For a 13 A circuit, that suits socket outlets and lighting strings where nuisance tripping on startup is a concern. The limitation class 3 rating tells you the let-through energy under short-circuit is tightly controlled — important for downstream equipment protection and cable damage limitation. The 3 kA Icn1 rating (EN/IEC 60898-1) is the lower end of the service range; in practice, most panel designers rely on the 6 kA Icn figure for coordination.
Panel integration
Clip-on mounting to DIN rail (35 mm per EN 60715). The 36 mm width (2 modules at 18 mm pitch) fits standard distribution board spacing. Cable entry from top or bottom — no special orientation needed.