What the 387700108 is and where it sits in the Beau series
The Molex Beau 387700108 is a dual-row, 8-circuit barrier block in the Beau 38770 series, rated 15 A per circuit at 300 V and accepting 14-22 AWG wire. It mounts directly to a chassis or panel face and terminates at the top with screws — the bottom is closed, so field wiring enters from one side only. The black PBT housing carries a UL94 V-0 flammability rating; the terminal screws are steel with a zinc clear-chromate finish. With 16 wire entries across two rows, each circuit brings one wire in and out through a commoning bar that the screw clamps down on.
What the ratings mean for your panel wiring job
The 0.375 inch (9.53 mm) pitch is the dimension that governs panel cutout spacing — any replacement or alternate must match this to drop into an existing mounting pattern without rework. The 15 A per circuit rating at 300 V covers a wide range of industrial control and power distribution wiring; the dual-wall barrier construction adds mechanical rigidity that matters in high-vibration environments where the wire entry points are under load. The 14-22 AWG wire range is stated for solid and stranded conductors — the screw clamp accepts the full cross-section across that range, so the same block handles a light-gauge signal run and a heavier 14 AWG power feed.