Siemens 5SU1354-7GV06 RCBO — 6 A, Type A, C Curve
The Siemens 5SU1354-7GV06 is a SENTRON RCBO combining overcurrent and residual current protection in a 2-pole 1P+N package. The Type A fault-current detection catches pulsating DC and sinusoidal AC earth faults — common in single-phase rectifier circuits or VFD-fed equipment. Breaking capacity is 10 kA per EN 60898 for domestic-style coordination, and 35 kA per IEC 60947-2 for industrial panel duty; that 35 kA rating means it can interrupt a high-fault bolted short without upstream fuses needing to clear first, which simplifies selectivity in a distribution board.
Thermal derating and conductor sizing
Above that, the thermal-magnetic trip derates: 5.7 A at 40 °C, 5.4 A at 50 °C, 5.1 A at 60 °C, and 4.62 A at 70 °C. If the panel runs warm — say 50 °C inside a sealed enclosure — the effective continuous current drops to 5.4 A, which matters when sizing the downstream load. The terminals accept 0.75 mm² to 25 mm² solid or stranded copper, so it lands on standard 2.5 mm² lighting circuits or 4 mm² small-power feeds without adapters.
The 5SU1354-7GV06 snaps onto a DIN rail (2 width units, 36 mm wide) and fits any mounting position — horizontal, vertical, upside down — with an installation depth of 70 mm and overall depth of 77 mm. The supply cord can enter from the top or bottom, which simplifies busbar routing in a crowded distribution board. Touch protection is built in, so live terminals are shielded when the front cover is closed.