The Siemens 5SY3010-7KV26 is a 1+N-pole miniature circuit breaker (MCB) rated for 230 V with a 4.5 kA breaking capacity, C-curve at 10 A, and the neutral on the left.
The C-curve (10 A) trips magnetically between 5× and 10× rated current — the standard choice for mixed resistive and moderate inductive loads like lighting circuits, small transformers, and general socket outlets. The 4.5 kA breaking capacity at 230 V is the fault-current ceiling the interrupter can clear without welding or arc-over; verify the prospective short-circuit current at the installation point stays under that value for coordinated protection. 1+N-pole means the line pole is switched and protected while the neutral pole switches only — it does not have an overcurrent trip on the neutral. The neutral-left orientation matches Siemens distribution boards where the busbar is keyed for left-side neutral; swapping polarity would require a different variant.