What this RCBO is and where it fits
The Siemens SENTRON 5SU1354-1RC16 is a 2-module, 2-pole (1P+N) RCBO combining a 16 A overcurrent trip with a 30 mA Type AC residual-current device in a single DIN-rail unit. The C characteristic handles moderate inrush loads like small motors, pumps, and lighting banks — it trips between 5× and 10× rated current for short circuits, while the 30 mA RCD side covers personnel protection against line-to-ground faults. Breaking capacity is rated at 10 kA according to EN 60898 for residential and commercial distribution boards, and 20 kA per IEC 60947-2 for industrial panel applications, giving you selectivity headroom downstream of a higher-rated main breaker. Supply can enter from either top or bottom, and the unit mounts in any position — no derating for upside-down installation on a crowded DIN rail. The IP20 rating applies once the distribution board is closed and conductors are connected, which is standard for enclosed panel gear.
Panel fit and environmental range
Width is 36 mm (2 modular width units), depth 70 mm, height 90 mm — identical footprint to the standard SENTRON MCB range. It snaps onto a 35 mm DIN rail and occupies the same slot width as two single-module breakers. The operating temperature span is -40 °C to +75 °C, with max 95% humidity, so it handles unheated enclosures in cold stores or outdoor kiosks without special derating. Overvoltage category III and pollution degree 2 mean it is rated for fixed-installation distribution boards downstream of the utility meter — standard for commercial and light industrial panels. The insulation voltage (Ui) is rated at 264 V, surge voltage resistance at 4 kV, and the supply frequency is 50 Hz.