The Siemens 5SL4240-6CC is a 2-pole miniature circuit breaker rated 40 A with a B-curve trip characteristic, breaking capacity of 10 kA at 400 V. That 10 kA SCCR at 400 V means it safely interrupts fault currents up to that level without cascading upstream — critical for panel coordination studies. The B-curve (3-5× In magnetic trip) suits resistive and lighting loads where inrush is modest; for motor circuits you would typically reach for a C or D curve instead.
Compliance & Documentation
RoHS compliant since 01-06-13. REACH Article 33 disclosure: contains Lead (CAS 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. Group Code P310, Product Group 3822 for internal Siemens cataloguing.