0.437" Pitch, 3-Circuit Barrier Block for Panel Power Distribution
The TE Connectivity Buchanan 1546670-3 is a 3-circuit barrier strip with a 0.437" (11.10mm) pitch, designed for chassis or panel mounting in power distribution and control circuits. It accepts 14-22 AWG wire through a dual-wall barrier with screw top termination and a closed bottom, rated 25A at 300V.
The 25A per-circuit current rating and 300V voltage rating cover most industrial control and lighting circuits. The 0.437" pitch provides creepage between adjacent circuits for the 300V rating. The dual-wall barrier reduces accidental shorting during wiring.
Wire Range and Termination — Screw Clamp, Closed Bottom
The top termination uses steel screws with a nickel finish, clamping 14-22 AWG solid or stranded wire. The closed bottom means the screw terminal does not pass through the block — the wire is trapped between the screw and the current bar inside the housing. This is a standard screw-clamp barrier block: reliable for permanent installations, but the screws can back off under thermal cycling if not torqued to spec. The flange on each end allows bolting the block to a chassis or panel, providing strain relief for the incoming wires.