Ratings that drive the fit
The 387700112: The current rating of 15A per circuit is governed by the terminal screw material (steel, zinc clear chromate finish) and the PBT housing's thermal ceiling. The dual-wall barrier construction provides the dielectric separation that lets the 300V rating stand at 0.375" pitch. Confirm the circuit count matches the BOM position count before committing: this is a 12-circuit, 2-row part with 24 individual wire entry slots. The flange feature and chassis/panel mounting type mean this is a through-panel part — it mounts to a surface or enclosure face with a fastener at each end of the housing. The top termination is screw-driven; the bottom is closed. That closed-bottom design eliminates any drip or debris entry from below the panel, which is the intended environment for this class of barrier strip in industrial enclosures.
Wire and termination
Wire range is 14-22 AWG — the narrower end of that window is where the 15A rating has real headroom; at 22 AWG the current per circuit is the limiting factor, not the terminal. Screw-top dual-entry means each circuit accepts two conductors in the same clamp, which is the common practice for daisy-chain or bus wiring in control panels — not a pigtail termination method. Torque to the screw manufacturer's specified value; zinc chromate finish on steel does not tolerate over-torque without risk of galling at the screw head.