What it is and what it does
The Siemens 5SU1356-7GV10 is a SENTRON RCBO — a combined residual current device and miniature circuit breaker in one 2-module-wide (36 mm) package. It protects a single-phase final subcircuit against both overload/short-circuit and earth leakage, with a 10 A rated current, C-trip curve, and 30 mA type A residual sensitivity. The dual breaking capacity is rated at 6 kA per EN 60898 and 15 kA per IEC 60947-2, giving it headroom for industrial panel coordination where the higher standard applies.
Panel fit and deployment context
Snaps onto DIN rail (EN 60715) in any mounting position, occupying 2 MW at 36 mm wide. The 77 mm depth and 70 mm installation depth mean it sits flush in standard distribution boards — no extra enclosure depth needed. Supply can enter from top or bottom, which simplifies busbar routing in populated panels. Rated IP20 with conductors connected and the distribution board installed, so it's intended for enclosed use only.
What the ratings mean for your selection
The C-curve means magnetic trip between 5× and 10× In — suitable for moderate inrush loads like small motors, transformers, or lighting banks. The 30 mA type A residual detects pulsating DC fault currents as well as sinusoidal AC, covering modern electronics and variable-speed drives downstream. Energy limitation class 3 keeps let-through energy low, protecting downstream wiring and connected equipment during a fault. Halogen-free and silicon-free construction matters for environments where outgassing during a fault could contaminate sensitive contacts or optics — clean-room adjacent panels, semiconductor tool hookups, or medical equipment rooms. Rated for overvoltage category III and pollution degree 2, so it's suited for fixed-installation distribution boards within a building, not for outdoor or wet locations without additional enclosure protection.
How it compares to the closest sibling
The nearest functional peer is the 5SU9354-7KK16, which shares the same 1P+N pole configuration, C-curve, 30 mA type A sensitivity, and identical 77×36×90 mm footprint. The key difference: the 5SU9354-7KK16 carries a higher 10 kA breaking capacity under both EN 60898 and IEC 60947-2, versus the 5SU1356-7GV10's 6 kA / 15 kA split. If your panel's prospective fault current exceeds 6 kA at the point of installation, the 5SU9354-7KK16 is the safer drop-in. For standard domestic or light commercial distribution boards where 6 kA is adequate, the 5SU1356-7GV10 is the economical fit.