The block is a single-level, top-entry design, meaning the wire enters perpendicular to the PCB surface, which suits enclosures where the board sits flat and the wiring drops in from above. Rated 7 A at 250 V. Accepts 18-26 AWG wire. That temperature range covers both unheated storage and the inside of a sealed industrial enclosure where ambient heat from nearby drives or transformers can push cabinet air well above room temperature.
Termination and Wiring — What the Screw Clamp Expects
The wire termination is a screw-driven rising cage clamp — turning the M2.6 screw lifts a stainless steel clamp plate that presses the wire against the current bar. This is a standard industrial terminal block termination: it accepts both solid and stranded wire without requiring a ferrule, though ferruled stranded wire gives a cleaner insertion in multi-strand bundles. The clamp material is steel, stainless; the screw is steel, galvanized with chromate plating — the galvanizing resists corrosion in humid cabinet environments. The contact itself is brass with tin plating — adequate for the 7 A rating and the moderate mating cycle count of a fixed terminal block (the wire is clamped once and left in place). Tin plating is the standard choice for stationary terminations where repeated disconnect-reconnect cycles are not expected.
No official cross-reference or second-source equivalent is recorded; the Buchanan series is TE Connectivity's own design, so a direct drop-in substitute from another manufacturer is not documented.