What this is
The Molex 387007504 is a 4-circuit barrier strip in the Beau 38700 series, rated 20 A per circuit at 300 V with a 0.325" (8.26 mm) pitch. The housing is black thermoplastic; the top termination uses screws with a captive plate that holds the wire against the plate before clamping — the captive plate prevents the wire from being pushed back out when the screw is tightened. The bottom terminates as a PC pin for through-hole soldering to a PCB or chassis rail.
What the ratings mean for the fit
At 20 A per circuit and 300 V, this is sized for branch power distribution inside industrial enclosures — not bus-level power, but the panel-level tap that feeds a drive, a contactor, or a PLC input group. The 14-22 AWG wire range covers the typical harness wire gauges used in industrial control panels; the dual-wall barrier construction adds mechanical separation between adjacent circuits so that a field splice or a bundled harness does not create a short path between adjacent screw terminals. The -40°C to 130°C operating range is wide enough for outdoor enclosures or unconditioned utility rooms where a connector might see thermal cycling without being in a climate-controlled cabinet. The 4-circuit count is a single-row configuration — this is a compact barrier block, not a multi-row distribution bus. If the application needs more positions the series extends up the position count, but the 4-circuit variant is the right choice when the panel circuit count is small and a full multi-row terminal block would be oversized for the wiring density.
Sourcing and lifecycle
The 387007504 carries an Active lifecycle status and is ROHS3 Compliant. No official successor or cross-reference is on record for this part. The Beau 38700 series is a known industrial terminal-block family — confirm that the position count and the screw-top / PC-pin termination style match the existing panel layout before committing, since a same-series sibling at a different circuit count would not be a drop-in replacement without reworking the wire routing and the PCB footprint.