The Siemens SENTRON 5SU1353-1WM06 is a 1P+N RCBO — a combined overcurrent and residual current device — rated 6 A at AC with a 30 mA residual tripping threshold, type AC, C-curve. It breaks fault currents up to 4.5 kA per EN 60898 and 25 kA per IEC 60947-2, so it handles both domestic and industrial fault levels depending on the standard applied. The 2-module-width (36 mm) body fits standard DIN-rail enclosures; installation depth is 70 mm. Supply can enter from top or bottom, and the neutral is switched internally.
What the ratings mean for fit
The 6 A rated current and C-curve mean this RCBO is sized for lighting or small resistive loads where inrush is moderate — not motor starting. The 30 mA residual provides additional protection against direct contact in final circuits. Type AC detects sinusoidal AC earth faults only; if the load includes rectifiers or VFDs that generate pulsed DC fault currents, a type A or F device would be needed. The 4.5 kA breaking capacity under EN 60898 is typical for domestic final circuits; the 25 kA rating under IEC 60947-2 confirms it can be used in industrial distribution where higher prospective fault currents exist. Pollution degree 2 and overvoltage category III are standard for fixed-installation switchgear in a distribution board.
Deployment context
Mounts on a standard 35 mm DIN rail in a distribution board or sub-distribution panel. IP20 applies only when the board is installed and conductors are connected — it is not rated for washdown or outdoor exposure. The 2 MW (36 mm) width and 70 mm depth are the key panel-fit dimensions; verify clearance for the depth, especially in shallow enclosures. Any mounting position is allowed.
Environmental and compliance
Halogen-free and silicon-free construction reduces toxic smoke and corrosive byproducts in a fire — relevant for installations in public buildings or areas with sensitive electronics. The ambient temperature range is -40 °C to +75 °C, with max 95% humidity. Mechanical service life is 10 000 switching cycles.