Siemens 5SL6510-6YA SENTRON MCB, 1P+N, B-Curve, 10 A, 6 kA

The 5SL6510-6YA: The B-curve trips between 3 and 5 times rated current (30–50 A magnetic release). If your fault level exceeds 6 kA, you need a higher-rated MCB or a current-limiting upstream device. The 1P+N design switches both line and neutral, which is required in some national wiring regulations (e.g., UK, Australia) for final circuits. The neutral pole is not protected — it opens and closes with the line pole but has no overcurrent release. That saves a pole width compared to a 2-pole MCB while still providing disconnection of both conductors. Temperature derating is built into the spec: full 10 A at 30 °C, 9.2 A at 45 °C, and a sharp drop to 0.95 A at 40 °C — that last figure looks like a data anomaly (likely a typo for a different variant), so treat the 45 °C value as the practical derated limit. Ambient temperature inside a crowded enclosure can easily hit 45 °C; plan for 9.2 A continuous load in that scenario.

Integration notes