The Siemens SENTRON 5SV3346-4KK14 is a 4-pole residual current operated circuit breaker (RCCB) with a Type B+ characteristic, rated 63 A and 30 mA sensitivity at 400 V AC. The Type B+ curve detects smooth DC fault currents plus AC and pulsed DC — critical for variable-speed drives, UPS systems, and PV inverters where standard AC-only RCCBs would be blind to a fault. The 30 mA trip threshold meets the IEC 61008-1 requirement for personal protection (additional protection against direct contact).
Short-time delayed design and selectivity
This RCCB is short-time delayed (S-type), meaning it withstands transient leakage currents without tripping — essential for selectivity in a distribution board where downstream RCCBs clear first. The short-circuit current rating is 10 kA, and per IEC 61008-1 the rated conditional short-circuit current is 0.8 kA. The maximum permissible series fuse short-circuit current is 100 A, which governs the upstream protection you pair it with.
Depth is 70 mm, height 90 mm. Mounting position is unrestricted. Silicon-free construction suits coating-sensitive environments like automotive paint lines.