What this RCBO carries and where it fits
The Siemens 5SU9326-7CR16 is a 1P+N residual current circuit breaker with overcurrent protection (RCBO) rated 16 A, 230 V AC, with a 6 kA breaking capacity. The C-characteristic means it trips between 5 and 10 times rated current — standard for motor and lighting circuits where inrush is moderate. Type A residual current detection (30 mA) covers pulsating DC faults from rectified loads like VFDs, LED drivers, and switched-mode supplies, which a plain AC type would miss.
Panel integration notes
Snap-on DIN rail mounting per EN 60715. The 1P+N module occupies a single 18 mm width — tight for a crowded enclosure, but leaves room for supplementary surge arrestors or isolators on the same rail. Rated short-circuit capacity of 6 kA suits domestic and light commercial distribution boards where the prospective fault current at the board doesn't exceed that figure; for industrial panels with higher SCCR upstream, verify selectivity with the main breaker.