Beau 38720 — 3-circuit barrier strip
The Molex 387203803 is the 3-circuit member of the Beau 38720 series, a flange-mounted barrier strip rated 25 A per circuit at 300 V with a 0.375-inch (9.53 mm) pitch. Black housing in thermoplastic, operating from -40 °C to 100 °C. The dual 2-wall barrier construction contains the field wiring side and the board termination side in separate channels — useful when the same block must carry a panel feed and a circuit branch without the wires crossing. Three wire entries on the top accept 12-22 AWG.
Top and bottom termination
The top termination uses screws with a captive plate — the plate holds the wire end under the screw head so that the conductor is not damaged or pushed out when the screw is driven home. This is the standard arrangement for barrier blocks used as panel feed-through points where field wiring is torqued and re-torqued over the service life. The bottom side terminates as an insulated solder turret, sized for through-hole board attachment — the turret height is the key dimension to confirm against the PCB hole pattern and any adjacent component clearance. Wire entry is 12-22 AWG across all three positions; the 12 AWG lower limit aligns with the 25 A current rating, so the gauge range and the current rating are co-rated. Confirm the applicable harness spec before specifying the conductor size.
Flange mounting — panel fit
The flange provides two mounting points on the block body for chassis or panel attachment. With the 0.375-inch pitch and three circuits, the overall block length is compact — confirm the panel cutout and fastener spacing against the block footprint before committing. The flange holes accept standard fasteners; the panel face must accommodate the wire entry side clearance for 12-22 AWG ferrules or stripped conductors.
Lifecycle and compliance
Listed Active with ROHS3 Compliant status. The terminal screw finish is zinc clear chromate on steel — adequate for indoor panel environments; confirm suitability for any exposed or corrosive-service requirement separately.