What it is
The Molex 387600318 is the 18-circuit member of the Beau 38760 dual-wall barrier terminal strip series, housed in black thermoplastic and terminated top-side with screws and a captive plate. The dual-row layout gives 36 wire-entry slots at 0.375-inch pitch across a 2-wall barrier frame. Rated 15 A per circuit at 300 V, the strip accepts 14–22 AWG conductors — the 15 A rating governs the per-circuit load ceiling; the 300 V rating sets the system voltage boundary for the circuit group. Operating temperature spans −40°C to 110°C, which covers most industrial enclosure and field-wire environments. Flange-mounting holes at each end secure the block to a chassis or panel face — the flange is the feature that distinguishes this member from non-flanged siblings in the same series and is what the field technician reaches for when the assembly needs positive mechanical capture under vibration or thermal cycling.
Where barrier blocks fit
Barrier terminal strips like the 387600318 are the go-to interconnect for industrial control panels, motor starter cabinets, and field Distribution boxes — anywhere multiple conductors need a single accessible termination point with visible separation between circuits. The dual-wall barrier prevents creepage under voltage, and the screw-top with captive plate holds the conductor under torque without the wire being pushed down the entry as the screw seats. Wire gauge range of 14–22 AWG covers the lighter industrial signal and control conductors — the 14 AWG floor aligns with the 15 A per-circuit rating; going heavier on wire gauge is fine for current headroom but the barrier entry width is fixed, so the conductor insulation OD must fit the slot.
Comparison against the Eurostyle 39100
That pitch delta means the mounting hole pattern and overall block width differ; the two are not panel-drop-in replacements for each other. The 387600318 wins on circuit density: 18 circuits at 0.375-inch pitch in a dual-row format versus the 0391002012's 12 circuits at a wider 0.394-inch pitch. For a new design, choose by circuit count first and pitch second; for a replacement, confirm the mounting hole pattern before committing.
Sourcing and compliance
The UL94 V-0 flammability rating on the housing insulation satisfies most industrial panel material requirements. Terminal screws are steel with zinc chromate finish — adequate for indoor industrial environments; for aggressive atmospheres the wire-side corrosion protection is determined by the conductor coating and any supplemental sealing, not the connector housing itself.