The Siemens 5SL6220-7YA is a 2-pole miniature circuit breaker with a C-curve trip characteristic, rated 20 A at 230 V with a 6 kA breaking capacity per IEC 60898.
The 20 A rating and C-curve (5–10× In magnetic trip) suit it for mixed resistive and moderate inductive loads — lighting banks, small motor circuits, socket outlets. The 6 kA breaking capacity at 230 V is the standard domestic/commercial fault level; for industrial panels with higher prospective fault current, you'd step to a 10 kA or 25 kA rated breaker. Two poles mean it simultaneously disconnects both line and neutral, which is required for single-phase final subcircuits in many national wiring rules.