The Siemens 5SU1326-7FP06 is a 2-pole RCBO from the SENTRON family, combining overcurrent protection and residual current detection in a single 36 mm wide module. It carries a C-curve trip characteristic and is rated 6 A at 30 °C, with a breaking capacity of 6 kA per EN 60898 and 7.5 kA per IEC 60947-2. The 6 kA per EN 60898 covers domestic/commercial fault levels; the 7.5 kA per IEC 60947-2 gives headroom for industrial panel coordination.
Temperature derating — the real-world current rating
Like all thermal-magnetic RCBOs, the 5SU1326-7FP06 derates with ambient temperature. At 30 °C it carries 6 A; at 40 °C it drops to 5.7 A; at 50 °C to 5.3 A; at 60 °C to 5 A; and at 70 °C to 4.7 A. If the panel runs hot — near a drive cabinet or in a sealed enclosure — size up or account for the reduced capacity. IP20 applies only when installed in the enclosure.