It's a DIN-rail mounted unit that takes up a single modular width of 18 mm, so it fits standard distribution boards without crowding adjacent ways. The big differentiator here is the built-in metering — it includes an ammeter, voltmeter, wattmeter, reactive power meter, and frequency meter, all integrated into the breaker body. That means you get per-circuit power monitoring without adding a separate meter module or cluttering the panel with extra devices. It's designed for residential buildings and infrastructure applications, meeting IEC/EN 60898-1 and GB/T 10963.1 standards, with error limits based on IEC 61557-12, IEC 62053-22, and IEC 62053-23.
The 18 mm width (one modular unit) is the key dimension for panel planning — it snaps onto the DIN rail and occupies the same slot as a standard single-pole MCB, so retrofitting into an existing board is straightforward. The IP20 rear side and IP40 front mean it's protected against finger contact from the front but needs to be inside a panel for the back; with connected conductors it's still IP20 overall.