The Siemens 5SL6308-7CC is a SENTRON miniature circuit breaker — 3-pole, C-curve, rated 8 A at 400 V AC, with a 6 kA breaking capacity per EN 60898.
The C-curve means the magnetic trip fires at 5 to 10 times rated current — so for an 8 A breaker, instantaneous trip happens between 40 A and 80 A. The 72 V DC maximum rating means it can also switch DC control circuits, but only up to that voltage — not for 110 V DC rail.
DIN-rail integration note
The 54 mm width (3 modules) matches the standard panel layout grid; leave at least 70 mm clearance behind the rail for the breaker body. The sealable option means you can lock the toggle with a wire seal or padlock — useful for lockout/tagout on a circuit that must not be re-energised accidentally.