What it is and where it fits
The Molex 391002106 is the 6-circuit member of the Eurostyle 39100 series — an enclosed-barrier terminal strip sized for 10-18 AWG conductors at up to 30 A per circuit. The 0.394" (10.00 mm) pitch and dual-row layout give a compact footprint for chassis and panel wiring in industrial automation, power distribution, and motor-control applications where field-terminated connections need to hold under vibration. The top-screw termination accepts stranded or solid wire without special tooling; the enclosed barrier keeps live surfaces covered during installation — a meaningful safety feature when the strip is mounted in an enclosure that a technician accesses live.
Same footprint, different circuit count
The 0391002012 is the 12-circuit member of the same Eurostyle 39100 series — same 0.394" pitch, same 30 A per circuit, same panel-mount footprint, same enclosed-barrier construction. The 391002106 carries 6 circuits where the 0391002012 carries 12, and is rated 300 V where the 12-circuit variant is rated 600 V. For a design already cut for the 10.00 mm pitch pattern, the panel cutout is compatible — but the circuit count and voltage delta mean a direct swap requires re-terminating the wire count to match the new strip, so the pair is mechanically interchangeable but not electrically equivalent at scale.