What this RCBO is and what it does
The Siemens 5SV9316-7NK10 is a SENTRON RCBO — a combined residual-current device and miniature circuit breaker in one 18 mm-wide module. It protects a single-phase final subcircuit against earth leakage and overload/short-circuit, with a 10 A rated current at 30 °C and a C-curve tripping characteristic for moderate inrush loads like small motors or lighting banks. The 1P+N pole configuration switches the line conductor and disconnects the neutral, fitting standard single-phase residential and light-commercial distribution boards.
Key ratings and what they mean for fit
The 10 A rating at 30 °C is the headline number, but the derating curve matters more in a warm panel: at 40 °C it carries 9.4 A, at 45 °C it drops to 9.1 A, and at 55 °C it's down to 8.4 A. If your ambient inside the enclosure runs above 40 °C, size the branch circuit load against the derated value, not the 30 °C figure. Breaking capacity is 6 kA per both EN 60898 and IEC 60947-2 — that's the fault current it can safely interrupt at the rated voltage. For most domestic and light commercial panels with a prospective short-circuit current under 6 kA, this is sufficient. The C-curve means magnetic trip occurs between 5 and 10 times In (50–100 A), so it avoids nuisance tripping on motor start or capacitor inrush but still clears a hard short fast. Rated insulation voltage (Ui) is 264 V, and it's rated for 230/240 V AC supply at 50/60 Hz. Overvoltage category III and pollution degree 2 are standard for fixed-installation distribution boards. The surge voltage resistance of 4 kV and surge current withstand of 1 kA at 8/20 µs give it reasonable immunity against switching transients and indirect lightning strikes on the mains.
Where it goes and how it mounts
This RCBO snaps onto a standard DIN rail (EN 60715) and occupies one modular width unit (18 mm). The installation depth behind the panel face is 70 mm, with an overall depth of 77 mm including the front protrusion. The supply can enter from either the top or bottom, which simplifies busbar routing and panel layout. Mounting position is unrestricted — it can be installed horizontally or vertically without derating. IP20 protection applies only when the distribution board is installed and conductors are connected — this is normal for an enclosed panel component. The operating temperature range spans -40 °C to 75 °C, with a maximum 95% humidity influence. Halogen-free and silicon-free construction matters for clean-room or high-reliability environments where outgassing could contaminate contacts or optics.