What it is — Beau 38770 barrier block
The Molex 387700306 is a 6-circuit dual-row barrier block in the Beau 38770 series. Rated 15 A per circuit at 300 V with a 0.375 inch (9.53 mm) pitch, it accepts 14–22 AWG conductors via top-entry screws with captive plate — the plate holds the wire in place when the screw is backed out, which matters for field re-termination without strand loss. The housing is black PBT rated UL94 V-0, and the flange feature allows direct panel or chassis mounting without a separate DIN-rail foot.
What the ratings mean for selection
15 A per circuit is the relevant current ceiling — a dual-wall barrier block like this is a power-distribution interconnect, not a signal connector, so the per-circuit rating governs directly. The 300 V rating is the dielectric withstand between adjacent circuits; confirm it clears the highest line-to-line voltage in the panel. The 12 wire entries (two per circuit) mean you can loop through or branch without a separate splice, which reduces harness count in simple buss topologies. The zinc-clear-chromate terminal screw finish handles the 14–22 AWG torque window without corrosion concern in enclosed panels — no gold plating needed at these cycle counts.