The TE Connectivity Buchanan 7-1437651-0 is a 3-circuit barrier strip from the #6 series, built for panel wiring where a screw-terminated, through-hole connection is needed. The 3-wall (tri) barrier isolates each wire entry, so a stripped conductor can't short to the adjacent circuit during installation or field service. Wire range is 12-22 AWG, which covers a main power feed on 12 AWG down to a control loop on 22 AWG in the same block.
Top termination is screws (steel, zinc clear chromate finish); bottom termination is PC pin for through-hole soldering to the board. Single row, 3 wire entries — one per circuit.