What this MCB is and what it does
The Siemens 5SL6540-8CC is a 1+N-pole miniature circuit breaker rated 230 V, 6 kA breaking capacity, with a D-curve trip characteristic and 40 A rated current. The D-curve (10–20× In) is designed for loads with high inrush currents — motor circuits, transformers, or lighting banks — where a B- or C-curve would nuisance-trip on startup. The 6 kA interrupting rating covers most residential and light commercial panel fault levels at 230 V.
Compliance and documentation
RoHS compliant since 01 June 2013. REACH candidate-list information is available on request. Export control is AL: N / ECCN: N, so no special licensing is needed for standard shipments.