The Siemens 5SU9346-1CR25 is a SENTRON RCBO — an RCD-operated circuit breaker that combines overcurrent protection and residual current detection in one 4-pole unit. The 30 mA trip threshold covers personnel protection against direct contact in standard distribution boards.
Mounts on DIN rail, 7 modular width units wide. Feed from top or bottom — no orientation restriction. The IP20 rating applies once the distribution board is installed and conductors are connected; that's standard for enclosed panel gear. Installation depth is 70 mm into the enclosure, overall depth 77 mm including the front face. Touch protection is built in.
Rated current derates with ambient temperature: 25 A at 30 °C, 23.3 A at 40 °C, 22 A at 45 °C, 21.5 A at 50 °C, 20.8 A at 55 °C. Surge voltage resistance 4 kV. Operating frequency 50/60 Hz.