Ratings that drive the fit decision
The 387800106: The 15 A per circuit rating governs the load — this is a power-range barrier block, not a signal-level part, so the wire gauge range (14–22 AWG) is the pairing constraint. The top-termination screws accept the conductor directly; the closed bottom prevents debris entry into the termination channel. The zinc clear-chromate terminal screws are steel, which is standard for this class — confirm the operating environment has no corrosive atmosphere that the plating won't survive. The UL94 V-0 flammability rating on the thermoplastic housing means it can be used inside an enclosure without flame propagation concern — relevant in industrial panels to the applicable standards.