The Siemens SENTRON 5SY7606-8CC is a 4-pole miniature circuit breaker with a D tripping characteristic, rated 6 A at 400 V AC. The 3P+N configuration switches the neutral conductor, which is required for TN-S or TN-C-S systems where you need to isolate the neutral on fault.
Snaps onto DIN rail via the quick assembly system; 4 width units (72 mm) and 70 mm installation depth leave room for adjacent devices in a crowded enclosure. The combined terminals top and bottom accept solid or stranded conductors from 0.75 to 35 mm² — enough for the load side on a 6 A circuit. Torque the screw terminals to 2.5–3.5 N·m.
Rated for ambient -25 to +55 °C, storage -40 to +75 °C. Overvoltage category III suits fixed-installation distribution boards. The D-curve (10–20× In) is for high-inrush loads like motor starters or transformers; it avoids nuisance trips on startup.