It packs a 16 A thermal-magnetic MCB and a 30 mA earth-leakage module into a single 18 mm wide DIN-rail module, saving a slot over separate devices. The 1P+Ns pole configuration means it switches the live conductor only and monitors the neutral for leakage; the neutral stays connected through the device. Integrated earth-leakage protection at 30 mA sensitivity covers personnel protection against direct contact (per IEC 61009-1).
The 30 mA earth-leakage sensitivity is the standard threshold for personal protection in TN earthing systems — it's what you'd specify for socket-outlet circuits in residential or office distribution boards. The Curve B characteristic (3-5 In) means it holds through normal inrush from resistive loads but trips fast on a short circuit; don't use it for motor circuits or transformers where the inrush could nuisance-trip. The IP20/IP40 rating means it's protected against solid objects >12.5 mm (fingers) in normal use, and IP40 inside an enclosure; not for wet locations without a weatherproof cabinet.
Padlockable with a 4 mm diameter padlock for lockout/tagout. The toggle provides ON/OFF local indication. Depth is 77.5 mm, height 110 mm — check enclosure depth clearance before panel layout.