The SENTRON 5SY3006-6KV is a miniature circuit breaker (MCB) — a 1+N-pole unit with a B-trip curve rated 6 A at 230 V AC and a 4.5 kA interrupting capacity per EN 60898. The 1+N-pole design switches both line and neutral, so it fits single-phase final subcircuits where the neutral needs disconnection.
The B-curve 6 A rating means it will hold a steady 6 A load and trip magnetically between 18 A and 30 A — fast enough to protect 1.5 mm² or 2.5 mm² copper wiring in a typical lighting or socket-outlet circuit. The 1+N pole arrangement switches the neutral, which is a code requirement in many jurisdictions for final subcircuits. Mounting on a standard DIN rail with 70 mm depth means it drops into any SENTRON or compatible distribution board without a panel modification.