The integrated earth-leakage protection means you don't need a separate RCCB upstream for this outgoing circuit.
Breaking capacity is 6000 A Icn at 220...240 V AC, 50/60 Hz, per EN/IEC 61009-2-1. If your site has a transformer close to the board and the PSC is higher, you'll need to step up to a 10 kA device. The C-curve trips magnetically between 5 and 10 times rated current (30 to 60 A for this 6 A unit). That suits general-purpose loads like lighting, socket outlets, and small appliances where inrush isn't extreme. For motor or transformer starting loads, a D-curve would be a better fit; for purely resistive loads, a B-curve gives tighter protection. The IP20 body (IP40 inside a modular enclosure) is standard for panel-mount gear; no special washdown rating, so keep it inside the enclosure.
The toggle gives local ON/OFF/fault-trip indication — useful for commissioning and fault-finding without a meter. Electrical and mechanical durability are both rated at 20,000 cycles, which is standard for this class of MCB/RCCB.