The 3+N-pole configuration (three protected phases plus switched neutral) means it fits 4-module-wide DIN-rail positions in 3-phase panelboards where the neutral is switched rather than solidly bused. The 13 A rating is the overcurrent threshold for each phase — size the downstream conductor for at least that ampacity.
RoHS compliant since 01-06-13, with REACH candidate-list disclosure available. The product class is B — return restricted, so coordinate with your Siemens channel partner for any RMA or replacement requests.
