The Siemens 5SU1326-7FP16 is a 2-pole RCBO from the SENTRON series, combining overcurrent and residual-current protection in a single 36 mm wide module. Rated 16 A at 30 °C with a C-curve trip characteristic, it breaks fault currents up to 6 kA per EN 60898 or 7.5 kA per IEC 60947-2. The thermal derating is published: at 40 °C it's 15.2 A, at 50 °C it's 14.3 A, and at 70 °C it's 12.5 A — so if the panel runs hot, size the load accordingly.
Integration notes
The 5SU1326-7FP16 occupies 2 modular width units (36 mm) on a DIN rail, with a depth of 72 mm and height of 85 mm.