What this is
The Molex 387207504 is the 4-circuit member of the Beau 38720 series, a dual-wall barrier block family built for through-hole PCB termination. The top side accepts a screw with a captive plate — the plate distributes clamping force evenly across the wire barrel so 12–22 AWG stays secure under vibration without the conductor cold-flowing into the insulator. The board side terminates to a PC pin, meaning it solders directly into a PCB land pattern rather than spring-caging into a rail. Rated 25 A per circuit at 300 V AC/DC, it sits in the lower-current range of the Beau 38720 family.
Ratings that drive the fit
25 A per circuit at 300 V frames this as a power-distribution terminal strip, not a signal-level block. The 12–22 AWG wire range syncs with that — a 22 AWG run will derate closer to the thermal limit of the housing than a 12 AWG run, so size the conductor to the actual load, not just to the connector ceiling. The -40°C to 100°C operating range covers most industrial panel environments; the UL94 V-0 rating means the housing self-extinguishes if a fault overheats the block, which is the compliance baseline for enclosed industrial equipment. Mating side is the screw-barrel entry on top — four separate wire entries, one per circuit. The captive plate screw eliminates the need for a ferrule on fine-stranded wire, which is a genuine assembly-time saving in high-count panel builds. Bottom termination is a solid PC pin; there is no pluggable mate on the board side — once soldered, it is a permanent connection.
Compliance and sourcing
Lifecycle is Active with ROHS3 Compliant status on record. No official successor or cross-reference MPN is listed for the 387207504. Quoted to order against BOM quantity — confirm the panel footprint against your layout before committing. The Beau 38720 base product number is 038720; series siblings with different circuit counts share the same termination style and mounting footprint, so a panel upgrade from 4 to a higher-count variant is a pitch-identical expansion if routing permits.