What this RCBO is and where it lands
The Siemens 5SU9354-7KK10 is a SENTRON RCD-operated circuit breaker — an RCBO that combines overcurrent protection and residual-current detection in a single 2-MW-wide module. It protects a single-phase final subcircuit (1P+N, one protected pole) against overload, short-circuit, and earth leakage in one go. Breaking capacity is 10 kA per both EN 60898 and IEC 60947-2, so it clears faults up to that level in a 230/240 V AC, 50/60 Hz network. Supply can enter from top or bottom — no orientation fuss during panel build.
Inside a warm enclosure at 40 °C it derates to 9.4 A; at 50 °C it drops to 8.7 A; at 55 °C it is 8.1 A.
The module is 36 mm wide (2 MW), 77 mm deep, 90 mm tall, with a 70 mm installation depth — fits standard DIN-rail enclosures. Pollution degree 2, overvoltage category III, surge voltage resistance 4 kV. Mount in any position.