What it is
The Molex 387800204 is a 4-circuit Beau 38780 barrier strip built with a dual-wall (2-wall) barrier frame — the second wall raises the creepage distance between adjacent circuits, cutting arc-tracking risk in dirty or vibration-prone panel environments.
Key ratings and what they mean
Rated 15 A per circuit at 300 V. The current ceiling is governed by the 14–22 AWG wire gauge the screw terminals accept — at 14 AWG the wire is the current path's limiting element, not the contact; at 22 AWG the wire derates the usable current well below 15 A. Match the wire gauge to the circuit current before committing. The 0.438" (11.12 mm) pitch sets the footprint and the spacing between adjacent circuit positions. Eight wire-entry holes serve the four circuits — two entries per circuit, top-entry only, with the bottom closed. The flange feature provides a panel-mount anchoring point; the black thermoplastic housing carries a UL94 V-0 flammability rating.
Where this class is used
Barrier strips of this type are the field-wiring backbone in industrial control panels, motor-drive lineups, and power-distribution assemblies — anywhere multiple heavy-gauge conductors need a single, visible, screw-terminated bus point. The dual-wall barrier and UL94 V-0 rating suit the panel-build environment where arc-tracking and flame resistance are design requirements.