It's designed as a line protection device — meaning it sits at the main incoming feed or large subfeed, not on individual motor circuits. That's a real panel-space saver.
Dimensions are 248 mm high by 138 mm wide by 110 mm deep — it'll fit a standard MCCB slot in most SENTRON or third-party distribution panels. No derating up to 50 °C at full 400 A, which is solid for a warm enclosure. That thermal curve is what you check when the panel sits next to a furnace line or in a non-climate-controlled electrical room.