The Siemens SENTRON 5SQ2360-0KA16 is a 3-pole miniature circuit breaker (MCB) with a B tripping characteristic, rated 16 A at 400 V AC, 50 Hz. That 3 kA rating is the same across both standards, which simplifies coordination in a mixed-certification panel.
Three width units (each 18 mm) on a standard DIN rail — 54 mm total rail space. Installation depth is 55 mm, so it sits flush in a typical distribution board without crowding the gland plate. IP20 rated, meaning finger-safe terminals but no washdown tolerance; keep it inside a closed enclosure. No neutral switching (the neutral bar runs through separately), which is standard for 3-pole breakers in a 3-phase system where the neutral is solid.