5-position, 3.50mm pitch, side-entry screw termination
The 1776275-5 is a 5-position, single-level terminal block from the TE Buchanan series. The interlocking side feature lets you gang multiple blocks side-by-side without a separate rail, building a wider terminal strip from identical units.
Active production, no cross-reference on record
No pin-compatible equivalent from another brand is listed in the series documentation. The Buchanan series uses a proprietary screw-clamp geometry; a direct cross-reference would require matching the 3.50 mm pitch, side-entry orientation, and M2.6 screw thread — a rare combination outside TE's own family.
Screw torque and field-fit checklist
The M2.6 screw is torqued to 0.28 Nm (2.5 Lb-In) — overtightening strips the polyamide (PA66) thread, undertightening leaves the wire loose under vibration. The screw material is steel, galvanized and chromate plated; the clamp is stainless steel. The contact is brass with copper-tin plating, adequate for the 7 A rating in dry indoor environments. Color blue — not a functional spec, but helps identify the block on a crowded board. The interlocking side feature is a mechanical key that aligns adjacent blocks; no separate marking tag accessory is listed for this part.