The Siemens 5SY4604-7CV is a 3-pole-plus-neutral miniature circuit breaker with a C4 tripping characteristic and a 15 kA interrupting capacity at 400 V AC.
Snap-on DIN rail mount, standard 18 mm per pole width. The 3P+N configuration occupies four modules. Rated for 400 V line-to-line, so it suits three-phase distribution boards in commercial or light industrial sub-distribution. The C4 curve keeps it selective with upstream C-curve or B-curve breakers in a typical radial topology.