The Siemens 5SL6616-7BB is a miniature circuit breaker (MCB) rated for 400 V with a breaking capacity of 6 kA, configured as 3+N-pole, C-curve, 16 A, in the Italy version.
Panel Integration
Snap-on DIN rail mounting for EN 60715 top-hat rail. The 3+N-pole format occupies four module widths (4 x 18 mm) in the distribution board. Spring-cage or screw terminals accept 1.5–25 mm² conductors; strip length 12 mm for screw terminals, 10 mm for cage. The C-curve characteristic means no nuisance tripping on capacitor inrush or motor start — but verify the load's starting current profile against the magnetic trip threshold (5–10 x In) if driving a transformer or a bank of LED drivers.