The Siemens 5SV5346-6KL is a 4-pole residual current circuit breaker (RCCB) from the SENTRON 5SV5 series, rated for 63 A at 400 V AC and designed to detect Type A fault currents — AC sinusoidal and pulsating DC — making it a fit for mixed-load panels with electronics, drives, or rectifiers. It carries a 10 kA short-circuit current rating (SCCR). The unit is instantaneous (no short-time delay), meaning it trips within milliseconds on a residual current — standard for general-purpose shock protection in distribution boards.
Snaps onto DIN rail (REG mounting) and occupies 4 width units (72 mm wide) — standard 4-pole RCCB footprint for a 400 V three-phase + N panel. Depth is 70 mm, same as installation depth; height is 90 mm. Supply can land top or bottom; neutral is on the left (N left variant).
Thermal performance and derating
At 65 °C it drops to 57.35 A, and at 70 °C to 48.84 A.