1.27 mm 2×5 Box Header Footprint, Keying, and DFM Guide

1.27 mm 2×5 shrouded box header is a through hole package used for through hole assembly, also seen labeled 10-pin 0.05-inch IDC header, 2×5 micro box header, Cortex debug connector style. A dependable footprint follows the exact orderable-device drawing rather than the family name: nominal body Often about 10 × 5 mm; series-specific, overall span Includes keyed shroud and cable latch, seated height Commonly about 5–7 mm above board, pitch 1.27 mm in both axes, pin count 10 in a 2×5 array, and exposed pad Small plated through-hole annuli.

Use the exact keyed connector drawing, including shroud, locating features, finished holes, and mating-view pin map.

Typical uses include SWD and JTAG, compact IDC cables, production programming. Several keyed 1.27 mm debug connectors look alike but differ in shroud and pin conventions; use the selected series drawing.

• The small polarized shroud fits ten contacts into about one quarter of a 2.54 mm 2×5 grid's area, making key orientation and drill tolerance critical.
• 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.

Keep the cable latch and ribbon exit clear, mark pin one beyond the shroud, and reserve probe access to power and reset signals.

• 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 hard. Fully seat and fixture before precision hand or selective soldering. Watch for notch reversal, small-hole breakout, and inaccessible inner joints.

• Verify the fab's small-hole annular capability and the assembler's access to two fine rows inside the shroud.
• 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 shroud seating and orientation, then continuity-map the exact production debug cable before relying on a programmer connection.
• Inspect barrel fill, wetting around the lead, polarity, seating, and mechanical alignment; continuity alone does not prove a durable connector joint.

Common mistakes:

• Confusing a cable's female mating view with the PCB header view mirrors SWD power, ground, clock, and data positions.
• Do not use nominal lead width as the finished-hole size or forget that plating reduces the hole after drilling.

1. Before approving 1.27 mm 2×5 shrouded box header, compare the exact orderable-device drawing with the library item: body range (Often about 10 × 5 mm; series-specific), terminal or lead span (Includes keyed shroud and cable latch), pitch (1.27 mm in both axes), pin count (10 in a 2×5 array), height (Commonly about 5–7 mm above board), and exposed-pad definition (Small plated through-hole annuli). Record the source drawing revision and every intentional courtyard, toe, heel, side, mask, or paste adjustment.
2. Treat the hard hand-solder rating as a prototype-planning input, not proof of production yield. Review notch reversal, small-hole breakout, and inaccessible inner joints with the assembler, confirm that fully seat and fixture before precision hand 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. Ten-pin map, key notch, cable exit, both 1.27 mm axes, hole size, and locator geometry need a combined check.
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.