What It Is and What the Ratings Mean
The Siemens 5SL6503-8CC is a 1+N-pole miniature circuit breaker from the Basic Devices family, rated 3 A with a D tripping characteristic at 230 V and a 6 kA breaking capacity. The D curve means this breaker is designed for loads with high inrush currents — typically motor circuits, transformers, or other inductive loads where the startup surge exceeds what a B or C curve would tolerate without nuisance tripping. The 6 kA breaking capacity at 230 V is the maximum fault current it can safely interrupt under standard conditions; for most residential and light commercial distribution boards this is sufficient, but verify the prospective short-circuit current at the point of installation.
Lifecycle and Sourcing Reality
RoHS compliance is confirmed since 01-06-13, and REACH candidate-list information is available on request.
Panel Integration and Deployment
The 1+N-pole format (switched phase plus switched neutral) is common in single-phase distribution boards where the neutral must be disconnected for isolation — typical in residential or light commercial final subcircuits. Mounts on standard DIN rail in the enclosure; the D curve suits motor or lighting contactor feeds where inrush is above the C-curve threshold.