2.54 mm Dual-Row Pin Header Footprint and DFM Practical Guide

2.54 mm 2×N vertical pin header is a through hole package used for through hole assembly, also seen labeled 0.1-inch dual-row header, 2×N P2.54, IDC-compatible header. A dependable footprint follows the exact orderable-device drawing rather than the family name: nominal body Usually about 5.0 mm wide; length is N × 2.54 mm, overall span Depends on post and optional shroud, seated height Insulator and post heights vary, pitch 2.54 mm within and between rows, pin count Variable 2×N array, and exposed pad Plated through-hole annuli.

Use the exact post and housing drawing, including 2.54 mm row spacing and any polarization feature.

Typical uses include programming headers, IDC cables, board stacking. Pitch is 2.54 mm, but numbering view, shroud, post length, and hole recommendation belong to the selected series.

• Two rows introduce a viewing ambiguity: datasheets may number from the mating face while CAD shows the PCB side. Odd/even convention must be documented.
• The finished hole must fit the lead at maximum material condition plus insertion tolerance and plating; the drill file normally specifies the pre-plating tool size.

Preserve cable bend radius and socket body clearance, and route power pins with adequate copper rather than relying on the connector's current headline alone.

• Reserve the full connector or component envelope on both sides, include mating and wire-entry space, and keep copper clear of hardware and hand-tool access.

Hand assembly is rated easy. Fixture-assisted hand, wave, or selective soldering. Watch for odd-even numbering mistakes, row reversal, and connector tilt.

• Long dual rows benefit from tooling or locating pegs; verify wave-solder access between rows and thermal relief on plane-connected pins.
• Choose annular rings from the fabricator's registration allowance and confirm whether slots, press-fit holes, or non-plated features need separate drill outputs.
• Account for wave or selective solder orientation, pallet access, thermal spokes, and bottom-side protrusion before panel release.

Inspection focus:

• Inspect both rows for fill and alignment, then mate a keyed cable and continuity-map every position end to end.
• Inspect barrel fill, wetting around the lead, polarity, seating, and mechanical alignment; continuity alone does not prove a durable connector joint.

Common mistakes:

• Mirroring the 2×N array from the mating view swaps every odd and even signal while leaving the connector mechanically perfect.
• Do not use nominal lead width as the finished-hole size or forget that plating reduces the hole after drilling.

1. Before approving 2.54 mm 2×N vertical pin header, compare the exact orderable-device drawing with the library item: body range (Usually about 5.0 mm wide; length is N × 2.54 mm), terminal or lead span (Depends on post and optional shroud), pitch (2.54 mm within and between rows), pin count (Variable 2×N array), height (Insulator and post heights vary), and exposed-pad definition (Plated through-hole annuli). Record the source drawing revision and every intentional courtyard, toe, heel, side, mask, or paste adjustment.
2. Treat the easy hand-solder rating as a prototype-planning input, not proof of production yield. Review odd-even numbering mistakes, row reversal, and connector tilt with the assembler, confirm that fixture-assisted hand, wave, or selective soldering is compatible with the build, and require the S1 connectivity gate plus relevant S2 geometry checks to pass against the released footprint and selected fabrication profile.

Manufacturing gate checks:

1. S1Pad count, numbering, and schematic parity. The gate must compare mating-view numbering, both row coordinates, pin count, hole diameter, keying, and all no-connect positions.
2. S2Finished-hole tolerance and annular ring. The lead must insert after plating while retaining enough copper for registration, solder fill, and mechanical load.
3. S2Finished-hole size and annular ring. Drill, plating, lead tolerance, and the remaining annular ring must agree with the fab capability.