The Molex 387800106 is a 6-circuit barrier strip from the Beau 38780 series, built for panel-mount power distribution where screw termination and a closed backplane are the standard. Pitch is 0.438" (11.12 mm) center-to-center — that spacing sets the terminal layout on the panel, so measure the existing hole pattern before ordering. Dual-wall barriers isolate each wire entry on both sides, which cuts the chance of a short between adjacent terminals when the machine shakes. Flanges on the housing let you bolt it to a chassis or enclosure wall; the closed bottom means no exposed terminations behind the panel.
Against the 5-circuit 387800105 at the same 0.438" pitch and same 15 A, 300 V rating — the only difference is position count. Six circuits vs five means one more terminal position in the same strip width per circuit. The 9-circuit 387800109 shares the same footprint per position, just a longer overall strip. Pick the circuit count that matches your BOM line; the pitch and termination style are identical across the family.
This is a standalone barrier block — no mating connector half. Wire lands directly under the screw terminals on top; the closed bottom means the back of the strip has no exposed contacts. Accepts 14-22 AWG wire. Terminal screws are steel with zinc, clear chromate finish. The strip mounts to a chassis or panel via the flanges; no PCB footprint needed.