What this is
The Molex 391001809 is the 9-circuit member of the Eurostyle 39100 barrier-strip series, rated 20 A per circuit at 600 V with a pitch of 0.315" (8.00 mm). It accepts 12-22 AWG conductors via top-entry screws over an enclosed dual-row barrier body — the closed bottom prevents accidental contact with live terminations once the wire is seated. The PA66 housing carries a UL94 V-0 flammability rating and operates from -40°C to 105°C, so it covers the full temperature envelope of most industrial panel environments.
Where the class fits
The Eurostyle 39100 series uses an enclosed barrier with top-entry screws and accepts 12-22 AWG conductors. The 9-circuit dual-row layout covers multiple conductors per phase in a single strip without requiring a crimp tool for field termination.
How it compares to the 12-circuit sibling
The 0391002012 — the next position-count up in the same series — carries 12 circuits but steps the pitch to 0.394" (10.00 mm). That wider pitch means a different panel cutout; the 391001809 cannot drop into a panel specified around the 0391002012 without reworking the mounting hole pattern. If your panel layout is fixed, match the position count to the available pitch: 9 circuits at 8.00 mm for tighter routing, 12 circuits at 10.00 mm if you need the extra positions and have the panel real estate.