It combines a 20 A thermal-magnetic circuit breaker (Curve C) and a 30 mA earth-leakage module in a single 18 mm wide DIN-rail unit — one module width, which saves a row in the panel compared to separate breaker and RCCB.
Rated 20 A at 30 °C with a 6 kA breaking capacity (Icn) at 230/240 V AC, 50 Hz. That 6 kA rating is the standard domestic and light commercial fault level in most IEC markets — it safely interrupts a short-circuit up to 6 kA without welding the contacts or cascading damage upstream. The integrated 30 mA earth-leakage protection covers the standard personnel-protection threshold per IEC 61009-1. That sensitivity catches leakage through a person touching a live conductor (body current above 30 mA is considered dangerous) and also detects deteriorating insulation on downstream wiring. The part carries AS/NZS 61009.1 and IEC 61009-2-2 certification, so it is accepted in Australian, New Zealand, and European installations. Thermal-magnetic trip technology means the thermal bimetal handles overloads (time-delayed, inversely proportional to the current), while the solenoid handles short-circuits (instantaneous).
IP20 rated, so it is for enclosed distribution boards only, not washdown areas.