Siemens 5SU1354-0KK13 — SENTRON RCBO, 13 A, Type B, Type AC Residual Current
Breaking capacity is 10 kA per EN 60898 and 20 kA per IEC 60947-2, giving it headroom above the standard domestic 6 kA requirement — useful for industrial sub-distribution where fault levels are higher. The Type AC residual current detection handles sinusoidal AC fault currents; for pulsed DC or smooth DC faults you'd need a Type A or F device. Rated current derates with ambient temperature: 13 A at 30 °C, 12.48 A at 40 °C, 11.96 A at 50 °C, 10.53 A at 65 °C, and 10.01 A at 70 °C. If the panel runs hot (common in crowded enclosures), the effective rating drops — factor that into your load calculation. Supply can enter from top or bottom, and mounting position is any orientation — no derating for sideways or inverted mounting.
Panel Integration
The 36 mm width (2 MW) matches the standard SENTRON grid; depth of 77 mm and installation depth of 70 mm mean it sits flush in a 4-row enclosure without hitting the gland plate. IP20 rating applies only with the distribution board installed and conductors connected — it's not a standalone IP20 device for open-panel use.