The Siemens 5SL6616-8CC is a miniature circuit breaker (MCB) from the Basic Devices family, rated 400 V with a 6 kA breaking capacity, 3+N poles, a D-trip curve, and 16 A current rating.
RoHS compliant since 01-06-13, with REACH Article 33 duty-to-inform documentation available. Product class B means return is restricted — contact your Siemens partner or our desk before any RMA.
400 V rated voltage covers standard 230/400 V three-phase networks across Europe and much of Asia. The 6 kA breaking capacity is adequate for residential and light commercial distribution boards where the prospective short-circuit current at the panel doesn't exceed that level. 3+N-pole configuration switches all three phases and the neutral; the neutral pole may be switched or just solidly connected depending on local wiring practice — check your panel's neutral switching requirement. 16 A rating matches a typical 3-phase lighting or small motor branch circuit; the D-curve's magnetic trip threshold (10–20× In) keeps it from dropping out on transformer inrush or motor start.