Beau 38770 Barrier Block — 3-Circuit, 0.375" Pitch
The 387700103: The housing is black PBT rated UL94 V-0 — the same material grade called for in most industrial control enclosures. Six wire entry slots allow field-side connection across the three circuits.
What the Ratings Mean
15 A per circuit at 300 V — the current rating applies to each circuit independently, so a 3-circuit block can carry 15 A on each of its three positions simultaneously, bounded by the wire gauge and the ambient temperature at the panel. For a 14 AWG run this is comfortable headroom; at 22 AWG the ampacity of the wire itself becomes the limiting factor before the connector does. Wire range is 14–22 AWG. The 14 AWG end covers motor branch circuits and higher-current feeds; the 22 AWG end handles signal-level runs and lower-current control wiring. Match the wire gauge to the circuit, not just the 15 A headline — the connector will not limit current on an oversized conductor. Terminal screws are steel with zinc clear chromate finish. Adequate for copper conductors in panel environments; direct connection to aluminium requires a suitable termination compound to prevent galvanic corrosion at the interface.
Where Barrier Blocks Sit in a Panel
Barrier strips like the Beau 38770 appear in panel wiring for industrial automation, power distribution blocks, and harness assemblies where a visible, field-serviceable wire termination is needed without the density constraint of a DIN-rail block. The dual-wall barrier isolates each circuit physically — the two insulating walls between adjacent terminals prevent accidental shorts when the block is wired under live conditions. The integral flange accepts a fastener through each mounting point for a secure, vibration-resistant panel attachment. The flange does not require a DIN rail — this is a direct-chassis mount part.
Lifecycle and Sourcing
Listed Active with ROHS3 Compliant status. No official successor or cross-reference listed. The 3-circuit count and 0.375" pitch are specific to the Beau 38770 series — confirm the position count against your BOM before committing.