Rated 32 A at 230/400 V AC with a 10 kA breaking capacity per EN 60898, it covers the common residential and light-commercial branch circuit where both earth leakage and overload/short-circuit protection are needed in one DIN-rail device. The Type C tripping characteristic (5–10× In magnetic release) suits motor and lighting loads with moderate inrush; the AC fault-current type detects sinusoidal residual currents. Active in the current Siemens lineup, so factory supply is standard — no last-time-buy pressure.
Wire capacity: solid or stranded 0.75–35 mm² — that's a generous terminal for a 32 A device, allowing easy feed-through of larger supply conductors. Mounting position any, which simplifies panel layout.
Rated current drops with ambient temperature: 32 A at 30 °C, 30.4 A at 40 °C, 28.8 A at 50 °C, down to 24.64 A at 70 °C. If the panel runs hot (e.g., enclosed switchgear or adjacent heat sources), use the 50 °C or 60 °C column for your load calculation. Operating ambient range -25 to +55 °C; storage -40 to +75 °C. Maximum power dissipation 11.4 W — relevant for thermal budgeting in a multi-device enclosure.
The 5SU1 design is the standard Siemens RCBO platform for the European and export markets.