What it is and where it sits
The Molex 387206812 is the 12-circuit member of the Beau 38720 series — a single-row, 0.375 inch (9.53 mm) pitch barrier strip built for industrial panel wiring. Top termination is screws accepting ring lugs or bare conductors; the bottom terminates in PC pins for through-hole board mounting. A flange on the body provides a secure anchor point on the panel face.
What the key ratings mean
The 0.375 inch (9.53 mm) pitch sets the barrier spacing and the board footprint — confirm the panel cutout and the PCB hole pattern before specifying. The dual-wall (2-wall) barrier construction is the structural feature that keeps adjacent circuits separated under voltage stress, which is why this class is preferred in industrial control and power distribution where humidity and contamination are real. 15 A per circuit and 300 V are the sustained ratings. That current figure is the continuous duty ceiling, not a peak — wire gauge and circuit loading determine what actually runs through each screw. The terminal screws are nickel-plated brass, which maintains clamp force on the conductor without the galling risk of bare steel. Operating range is -40 °C to 100 °C with PBT insulation — adequate for most industrial enclosure environments. The black color is a series option; it has no electrical consequence but confirms fit in a mixed Beau install.
Where this class is used
Barrier strips like the 387206812 are the go-to for field-wiring termination in industrial control panels, motor drives, and power distribution blocks — anywhere a reliable screw connection to a ring lug is preferred over a mating connector. The Beau series dual-wall construction gives the spacing needed to prevent tracking across the barrier in damp or contaminated environments, a failure mode that closed-body enclosed barriers mitigate differently but at a different footprint.
Sourcing
The 387206812 is Active and ROHS3 Compliant — quoted to order against the BOM quantity. No official successor order code is on record. Before committing, confirm the 12-circuit count matches the panel position count and that the through-hole PC pin footprint is the board termination the layout calls for.