The Siemens 5SL6216-6CC is a SENTRON miniature circuit breaker — 2-pole, B-curve, rated 16 A at 400 V AC, with a 6 kA breaking capacity per EN 60898.
At 30 °C ambient the breaker carries its full 16 A; at 40 °C it derates to 15.28 A, at 50 °C to 14.53 A, and at 55 °C to 14.14 A. IP20 with connected conductors is the protection class, so it's fine inside a closed distribution board but not in washdown zones.
