What this RCCB is and why it matters for your panel
The Siemens 5SV3314-6KK12 is a 2-pole SENTRON residual current circuit breaker (RCCB) rated 40 A with a 30 mA trip threshold, Type A waveform detection. That 30 mA sensitivity covers both sinusoidal AC and pulsed DC residual currents — the standard for general socket-outlet and lighting circuits where electronics or rectifiers are present. The 10 kA short-circuit current rating (SCCR) means it can safely interrupt a fault up to that level without upstream damage, coordinated per IEC 61008-1 and EN 60898 (both list 0.5 kA rated breaking capacity). It snaps onto DIN rail (REG fastening) and occupies 2 modular width units (36 mm wide), with a 70 mm depth into the panel.
Ratings that drive fit — the so-what
The 30 mA trip is the maximum allowed for personal protection against direct contact in most residential and light commercial IEC installations. Type A means it catches pulsating DC fault currents from single-phase rectifiers — common in washing machines, LED drivers, and switch-mode power supplies — which a plain Type AC would miss. The 40 A rating holds across the full ambient temperature range from -25 °C to 45 °C (and derates to 40 A all the way up to 70 °C), so no temperature-related down-rating surprises in a warm enclosure. The I²t withstand of 58 000 A²·s and surge current resistance of 1 kA (8/20 µs) tell you it handles lightning-induced surges and capacitive inrush without nuisance tripping.
Integration and mounting notes
Mounts on DIN rail in any position — top or bottom feed accepted. The 70 mm installation depth fits standard enclosures. IP20 applies once the distribution board is installed with conductors connected. Silicon-free construction matters in painting or coating lines.