What this RCBO is and where it lands in the panel
The Siemens 5SU9346-1CR06 is a 4-pole (3P+N) RCD-operated circuit breaker — a combined residual-current device and MCB in one DIN-rail unit, 7 width units wide. It sits in a SENTRON distribution board protecting a final subcircuit against both overload/short-circuit and earth leakage (AC type fault current). Rated 6 A with a C tripping characteristic, it handles moderate inrush loads — think small motor starters, lighting banks, or control transformers — without nuisance tripping on startup. The 6 kA breaking capacity per EN 60898 and IEC 60947-2 means it safely clears a fault up to that level; in a domestic or light commercial panel with a 6 kA prospective short-circuit current at the point of installation, this RCBO coordinates without needing an upstream current-limiting device.
Temperature derating — the real-world current you can actually run
The 6 A rating holds at 30 °C ambient. At 40 °C it derates to 5.3 A; at 45 °C to 5.2 A; at 50 °C to 4.9 A; at 55 °C to 4.6 A. If the panel runs warm — say a crowded enclosure or a sunny roof-mount board — the actual continuous current you can pull is the derated figure, not the nameplate 6 A. The operating ambient range is -25 to +45 °C, so at 45 °C you are at the upper limit and the 5.2 A derating applies.
Terminal capacity and wiring constraints
Solid and stranded conductors both accept 0.75 to 35 mm² — a wide range that covers everything from 1.5 mm² lighting tails up to 10 mm² submains. The installation depth is 70 mm (the body depth is 77 mm including the front projection). Mounting position is any orientation; supply can enter from top or bottom. Touch protection is built in per the design.
Compliance and approvals
Rated per EN 60898 and IEC 60947-2, overvoltage category III, energy limiting class 3. The product is halogen-free and silicon-free. IP20 protection with connected conductors in an installed distribution board. The DIN EN 61346-2 and 81346-2 function designation is F.