Siemens 5SL6316-6BB SENTRON MCB — 3-pole B-curve 16 A, 6 kA
The Siemens 5SL6316-6BB is a 3-pole miniature circuit breaker from the SENTRON 5SL series, rated 16 A with a B tripping characteristic and a 6 kA breaking capacity per EN 60898 (also 6 kA per IEC 60947-2). It is designed for 400 V AC multi-phase operation, handles 50/60 Hz, and occupies 3 modular width units (54 mm) on a DIN rail.
The 1.8 W power loss per pole at rated current in hot operating state is modest — 5.4 W total for the 3-pole unit — so derating within a multi-device enclosure is manageable. The mechanical service life of 10 000 operating cycles is typical for this class; the part is not intended for frequent switching duty (use a contactor for that).
The part carries the Italy-specific version suffix (6BB), which typically affects packaging language and regional catalog listing — the functional ratings are identical to the standard 5SL6316-6 variant. For BOM traceability, the nameplate matches the order code exactly; no substitution without requalification.
Panel integration
Depth is 76 mm (installation depth 70 mm behind the panel surface), width 54 mm (3 MW units), height 90 mm. The 3-pole footprint matches the standard SENTRON 5SL family — same housing dimensions as the 5SL4363-7 (C-curve, 10 kA) and the 5SL6120-7 (1-pole, C-curve).