The Siemens 5SY6615-8 is a 4-pole (3P+N) SENTRON miniature circuit breaker with D-curve tripping, rated 1.6 A at 400 V AC. It carries a 6 kA breaking capacity per EN 60898 and 30 kA per IEC 60947-2, with a DC rating of 15 kA per IEC 60947-2 and 5 kA under UL 1077 / CSA C22.2 No. 235. The D characteristic means it tolerates high inrush currents — typical for motor or transformer circuits — without nuisance tripping on startup.
Mounting and wiring
Snaps onto standard DIN rail via the quick-assembly system. Accepts solid or stranded conductors from 0.75 to 35 mm² at both top and bottom combined terminals. Occupies 4 width units (72 mm) on the rail. Depth is 76 mm, installation depth 70 mm. Mount in any position; ambient range is -25 to +55 °C. IP20 with conductors connected.