The Siemens 5SY4410-8CV is a 4-pole miniature circuit breaker with a D10 tripping characteristic and a rated short-circuit breaking capacity (Icu) of 15 kA at 400 V AC. The D10 curve means it tolerates inrush currents 10 to 14 times the rated current before tripping magnetically — sized for motor and transformer loads where starting surges are routine.
Deployment context
Snap-on mounting to DIN rail (EN 60715) for panel integration. The 4-pole format occupies four modular-width units in the distribution board, so factor that into your DIN-rail fill and enclosure depth.