The Siemens SENTRON 5SV3646-5KK14 is a 4-pole residual current operated circuit breaker (RCCB), Type B+, selective design, rated 63 A and 300 mA residual sensitivity at 400 V AC. The Type B+ characteristic means it detects AC, pulsating DC, smooth DC, and high-frequency AC residual currents — covering variable-speed drives, UPS systems, and PV inverters that generate mixed-frequency leakage. The selective (S-type) design introduces a short intentional delay so the downstream RCCB trips first, keeping this unit as the back-up for discrimination in a multi-level distribution board. The 10 kA short-circuit current rating matches the fault level typical of a main distribution panel; the 0.8 kA rated conditional short-circuit current per IEC 61008-1 confirms the device withstands that fault without damage when protected by a series fuse up to 100 A.
Snap-on DIN-rail mounting in any orientation — installs in a standard 60 mm grid distribution board. Occupies 4 modular width units at 72 mm wide. Depth of 70 mm fits standard 70 mm installation depth enclosures. Silicon-free construction for applications sensitive to silicone outgassing (e.g., in proximity to coating or bonding lines).