What it is and what it does
The Siemens 5SL4650-8CC is a 3+N-pole miniature circuit breaker rated 400 V with a 10 kA breaking capacity, D-curve trip characteristic, and 50 A rated current — a standard DIN-rail device for protecting branch circuits against overload and short-circuit in commercial and industrial panelboards.
D-curve and breaking capacity — what they mean for fit
The D-curve trips between 10× and 20× In (500 to 1000 A instantaneous), which suits loads with high inrush currents — motor starters, transformers, welding equipment, or large capacitor banks — where a B or C curve would nuisance-trip on startup. The 10 kA breaking capacity at 400 V means it can safely interrupt a fault current up to that level without welding contacts or cascading failure upstream; adequate for most secondary distribution panels where the prospective short-circuit current stays under 10 kA.
Lifecycle and sourcing reality
Listed as current production (active lifecycle status). This is a standard catalog item in Siemens' 5SL family of Basic Devices, not a phase-out or NRDN line. The product class is B — return restricted, meaning Siemens directs buyers to their partner or contact for order placement; we source it to order against an RFQ through independent distribution, with availability and current pricing confirmed at quote time.
Compliance documentation
RoHS compliant since 01-06-13. REACH Article 33 duty to inform applies: the part contains lead (CAS-No. 7439-92-1) above 0.1% w/w in the candidate list. Export control classification is AL: N / ECCN: N — no special licensing required for most destinations.