What it is and what the ratings mean
The Siemens 5SL6650-7MB is a 3+N-pole miniature circuit breaker rated 400 V with a 6 kA breaking capacity, a C-trip curve, and a 50 A current rating. The C-curve means it trips between 5 and 10 times rated current — standard for general-purpose loads like lighting, small motors, and control transformers where moderate inrush is expected. The 6 kA interrupting rating at 400 V tells you it can safely clear a fault up to that level without upstream damage, which is the typical short-circuit capacity for a distribution board in a commercial or light industrial panel.
Compliance and documentation
RoHS compliant since 13-10-73. REACH Article 33 duty-to-inform applies: lead (CAS 7439-92-1) above 0.1% w/w is declared. No export restrictions (AL: N, ECCN: N). The packaging dimensions are 216 x 93 x 82 mm, shipped as a single piece.