The Siemens 5SU9356-7KK10 is a SENTRON RCBO — a combined RCD and MCB in one 2-module-wide (36 mm) package. It protects a single-phase final subcircuit against overload, short-circuit, and earth leakage. The C-curve tripping characteristic means it holds 5–10× the rated current for magnetic trips, so it suits mixed resistive-inductive loads like small motors, pumps, and lighting banks where inrush is moderate. Rated 10 A at 30 °C, it derates to 8.1 A at 55 °C — factor that into your panel thermal budget.
Breaking capacity and standards
Breaking capacity is 6 kA per EN 60898 and 10 kA per IEC 60947-2. The EN 60898 rating governs domestic and light commercial distribution boards; the IEC 60947-2 rating applies when the device is used in industrial switchgear assemblies. Overvoltage category III and pollution degree 2 confirm it for fixed-installation mains supply.
Mounting and integration
Occupies 2 modular width units (36 mm) on a DIN rail. Installation depth is 70 mm; overall depth is 77 mm. Supply can enter from top or bottom. IP20 with conductors connected and distribution board installed — standard for enclosed panel mounting. Halogen-free and silicon-free construction, which matters for clean-room or sensitive-environment installations where outgassing is a concern.