The 6 kA breaking capacity per EN 60898 (5 kA per UL 1077) tells you the maximum fault current it can safely interrupt; for a 400 V AC distribution board with a prospective short-circuit current under that threshold, this breaker clears the fault without cascading upstream. The 2-pole design switches both phase conductors but does not switch the neutral, per the evidence. For DC circuits, the maximum rated voltage is 72 V. The IP20 rating applies only with connected conductors, so the front face is finger-safe once wired, but the busbar area is not sealed against dust ingress — standard for a distribution board interior. The ambient temperature range spans -40 °C to 75 °C, with derating required above 55 °C per the evidence: max 95% humidity at 55 °C, tapering to 35% at 75 °C.
The breaker carries a UL 1077 and CSA C22.2 No. 235 listing for the North American market, with a 5 kA interrupting rating at 400 V AC. The EN 60898 rating of 6 kA covers the European installation standard. The evidence does not list specific RoHS or REACH declarations, but the halogen-free and silicon-free material specification is consistent with RoHS-compliant construction.