The Siemens 5SL4416-8CC is a 4-pole miniature circuit breaker from the SENTRON 5SL4 series, rated 16 A with a D tripping characteristic. It breaks fault currents up to 10 kA at 400 V AC — the D curve means it tolerates the inrush of motor or transformer loads without nuisance tripping, so it's sized for inductive circuits rather than general lighting or resistive heaters. The 10 kA interrupting rating at 400 V is the standard domestic and light commercial panel capacity; it clears a bolted fault before upstream devices need to coordinate.
What the ratings mean for fit
Four-pole construction (3 phases + neutral) suits three-phase panelboards where the neutral needs overcurrent protection — common in European TN-S or TN-C-S systems. The D-curve magnetic trip activates at 10–20× In (160–320 A instantaneous), so it rides through the starting surge of a 7.5 kW motor or a bank of switched-mode supplies without tripping. The 10 kA breaking capacity at 400 V is the standard domestic and light commercial panel capacity; it clears a bolted fault before upstream devices need to coordinate.