The Siemens 5SV3345-6KK01 is a 4-pole residual current operated circuit breaker (RCCB) from the RCCBs product family, rated at 125 A with a 30 mA trip sensitivity and 400 V AC supply. The Type A detection handles pulsating DC fault currents from rectified loads — VFDs, switched-mode supplies, and single-phase drives common on a paper machine line. The short-time delayed characteristic prevents nuisance tripping from transient leakage in wet sections or during motor startup, which keeps the machine running without unplanned downtime.
125 A continuous at 400 V AC covers the main feeder for a moderate motor control centre or a downstream distribution board. The 30 mA trip threshold is the standard for personnel protection — it clears a ground fault before fibrillation current is reached.
Integration notes
The 4-pole form factor occupies four modular DIN-rail spaces (78 x 97 x 85 mm packaging dimensions). Terminate the incoming supply on the top, load on the bottom — standard for panel builders. The short-time delay means it coordinates with downstream 30 mA instantaneous RCCBs; verify the grading in your selectivity study before commissioning. No auxiliary contact is integrated on this variant; if remote trip indication is needed, order the separate signal contact accessory from the same family.