The Siemens 5SU9304-7PK16 is a SENTRON RCBO (residual current operated circuit breaker with overcurrent protection) combining a Type A residual current device (30 mA) and a C-curve miniature circuit breaker (16 A) in a single 1P+N, 2-pole module. It is rated for 230/240 V AC at 50/60 Hz and delivers a 10 kA breaking capacity according to both EN 60898 and IEC 60947-2 — sufficient for most residential and light commercial distribution boards where fault levels stay under that threshold.
The 30 mA residual sensitivity (Type A) covers sinusoidal AC fault currents plus pulsating DC fault currents up to 6 mA — the standard for circuits supplying single-phase electronics, computers, or appliances with rectifiers. Supply can enter from either top or bottom, and the solid neutral (switched) is integral to the 1P+N design — no separate neutral bar needed downstream. The 1200 mm pigtail simplifies wiring in pre-fabricated distribution boards.