What this is
The Molex 387212816 is the 16-circuit single-row member of the Beau 38721 barrier-block series, rated 15 A per circuit at 300 V with a 0.375-inch (9.53 mm) pitch. Top termination is by screw clamping; the bottom terminates to a wire-wrap post. The housing is black PBT, the terminal screws are nickel-plated brass, and the assembly carries a flange for chassis or panel mounting.
What the ratings mean for the fit
The 15 A per-circuit rating governs wire gauge selection: the block accepts 14–22 AWG, so at 15 A you would run 14 or 16 AWG to stay within the conductor ampacity of the listed wire range. The 300 V rating is the insulation-withstand ceiling — for most industrial AC or DC control-tier voltages this is adequate, but confirm the system voltage against this limit before committing. The dual-termination style — screw clamp above, wire-wrap post below — means the field connection uses the screw side and any back-panel wiring uses the wrap side; plan the panel cut-out and wire routing accordingly. The flange anchors the assembly against vibration without additional hardware, which is the main reason to choose this variant over a bare DIN-rail barrier block in a fixed-panel environment. The operating range of -40°C to 100°C with PBT insulation covers the temperature envelope of most enclosed-panel and industrial-harness applications. The dual-wall barrier construction adds mechanical robustness to the insulation barrier between adjacent circuits.
Where barrier blocks are used
Barrier terminal strips of this type are the standard interconnect for field termination in industrial control panels, power-distribution chassis, and panel-mount harness assemblies where a discrete wire-entry point with visible, serviceable screw connections is required. The 16-circuit count and screw-top termination make this suited for single-row bus-arrangement wiring where circuit count, not density, drives the panel layout.
Lifecycle and sourcing posture
The 387212816 is Active and ROHS3 Compliant — no lifecycle flags or EOL notice on record. Quoted to order against BOM quantity; confirm your position count and the mating half (panel wire-wrap back-panel) before committing to the line. No official successor or cross-reference order code is listed for this series member.