The Molex Beau 38780 387800204 is a 4-circuit barrier block with a 0.438" (11.12 mm) pitch, designed for panel-mount power distribution. It uses a dual-wall barrier for increased creepage between terminals, top screw termination for field wiring, and a closed bottom — meaning all connections are made from one side, typical for junction boxes or chassis-mount terminal strips. Rated 15 A per circuit at 300 V, it accepts 14-22 AWG wire and provides 8 wire entries (two per circuit) for daisy-chain or feed-through runs.
The 0.438" (11.12 mm) pitch sets the terminal spacing — wide enough to maintain creepage for the 300 V rating without needing oversized board clearance. The 15 A per circuit rating is continuous at the terminal block level; derate above ambient if the enclosure runs hot. The dual-wall barrier (two walls between adjacent terminals) adds physical isolation, which matters for the 300 V working voltage in a panel environment. Top screw termination with a closed bottom means the block mounts flush to the panel and all wiring is done from the accessible face. The flange (feature) provides the mounting holes for chassis or panel attachment. The closed bottom also prevents accidental shorting to the panel behind the block. With 8 wire entries for 4 circuits, each circuit can terminate two wires — useful for looping power to a downstream device without a separate jumper. The 14-22 AWG range covers most control and power wiring in industrial panels.