Its TM220 thermal-magnetic release gives a fixed thermal curve and magnetic trip, so you get overload and short-circuit protection in one unit, no adjustment needed. Rated 50 A at 40 °C, it holds that current up to 50 °C, then derates to 49 A at 55 °C and 45 A at 70 °C — if your panel runs hot, that derating matters for the actual load you can hang on it. The interrupting ratings are the headline: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V.
Where it fits in a panel
Mounts on a DIN rail (standard 35 mm) or panel-mount — typical for a SENTRON distribution board. That 4-pole width (101.6 mm) is roughly 4 modular units at 25.2 mm each, so it takes up four slots on the rail.