Wire gauge and entry count
The 391001908: The strip accepts 12-22 AWG on 16 wire entries — two per circuit — giving a field tech room to land a feed and a jumper without double-stacking a single entry. The enclosed barrier housing keeps the live screw heads isolated, which matters in panels where adjacent circuits sit at different potentials and a tool slip is a real hazard.
Compliance and temperature
The PA66 nylon housing carries a UL94 V-0 flammability rating and operates from -40°C to 105°C — that range covers refrigerated equipment bays and heated enclosure interiors without a derating caveat at either end. ROHS3 compliant per; no UL or VDE rating is cited on this specific variant, so confirm against the specific panel cert if the end equipment requires it.