What it is
The Molex 387800104 is the 4-circuit member of the Beau 38780 series — a dual-wall (2-wall) barrier strip rated 15 A per circuit at 300 V, with a 0.438-inch (11.12 mm) pitch between barriers. It accepts 14-22 AWG wire via screw-top termination; the bottom is closed, so no live back-side stub is exposed when the block is panel-mounted. The flange feature provides a secondary anchoring point — useful when torqueing wire under vibration or in service conditions where the block sees repeated make-and-break at the screws. The black thermoplastic housing carries a UL94 V-0 flammability rating, which is the typical floor for enclosed electrical compartments and panel interiors where a barrier strip sees service.
Where barrier strips fit
Barrier strips like the 38780 series are the go-to for panel wiring in industrial automation — they bridge field wiring to equipment bus bars or discrete terminals without requiring a PCB. The dual-wall barrier gives each circuit a physical partition between adjacent screws, which reduces the risk of a tool or stray strand shorting adjacent poles during installation in a crowded enclosure.
Not a drop-in swap for the Eurostyle 39100 peers
The 0391002012 (12-circuit, 0.394-inch pitch, 30 A, 600 V, enclosed barrier type) and 0391002502 (2-circuit, 0.591-inch pitch, 63 A, 600 V, enclosed) are different series with different pitches, current ratings, and barrier constructions — neither is a pin-compatible substitute for the 387800104. The pitch delta alone rules a panel swap without re-drilling, and the 2-wall vs enclosed barrier distinction affects the enclosure sealing profile.
Active and in production
Listed as Active with ROHS3 Compliant status — quoted to order against the BOM quantity. Confirm the flange hole pattern and panel cutout dimensions against your enclosure drawing before committing, since the Beau 38780 flange profile is series-specific.