Siemens 5SU1354-6KK25 SENTRON RCBO — Type B, 25 A, 10 kA
The Siemens 5SU1354-6KK25 is a SENTRON RCBO (residual current circuit breaker with overcurrent protection) in a 1P+N, 2-pole design. Its tripping characteristic is B, meaning the magnetic release trips at 3–5× In — suited for resistive and general-purpose loads where inrush is moderate. Rated 25 A at 30 °C, it derates to 18.25 A at 70 °C (the thermal curve is in the spec table). Breaking capacity is 10 kA per EN 60898 and 20 kA per IEC 60947-2, so it can clear faults up to those levels without cascading upstream. The supply can enter from either top or bottom — no orientation restriction.
Panel fit and mounting
Width is 36 mm (2 modular width units), depth 77 mm, height 90 mm. Installation depth is 70 mm. Mounts in any position on a DIN rail inside an IP20 distribution board with connected conductors. Halogen-free and silicon-free construction — no outgassing concerns in sealed enclosures. Degree of pollution 2, overvoltage category III. Operating frequency is 50 Hz, insulation voltage rated 264 V, surge voltage resistance rated 4 000 V.