What the ratings mean for fit
The Siemens 5SL4515-8CC is a 1+N-pole miniature circuit breaker with a D tripping characteristic, rated 1.6 A and a breaking capacity of 10 kA at 230 V AC.
Integration note
Snap-on mounting to 35 mm DIN rail per EN 60715. The 1+N module occupies two 18 mm width units. Wire terminals accept 0.75–25 mm² copper conductors. The D-curve trip threshold suits motor and transformer branch circuits where the inrush exceeds the magnetic trip of a B or C curve — verify the load's starting current against the 1.6 A continuous rating and the D-curve magnetic trip range (10–20× In).