Pin Header Dimensions: Pin Length, Insulator Height and Pin Diameter
July 30, 2026Views: 209
排针尺寸封装
Split the drawing into four groups
“2.54mm 10P header” is not a specification. A buildable drawing needs pitch, pin/row count, pin length (or solder tail + mating length), insulator height, pin section and mounting style.
What each dimension controls
| Dimension | Typical (2.54mm) | Used for |
|---|---|---|
| Pitch | 2.54 / 2.00 / 1.27 / 1.00mm | Mating, IDC, pad centers |
| Pin section | Often 0.64mm square | Hole size, female cavity, current |
| Insulator height | From ~2.5mm, stackable | Keep-out, grip, female match |
| Pin length | Custom to board + fillet + engagement | THT protrusion, right-angle exit, SMT coplanarity |
Footprint is more than a 2.54 grid
- THT: finished hole ≈ pin + 0.10–0.20mm. Excess tail can hit the lid or the next board.
- Right-angle: check 3D keep-outs and cable bend.
- SMT: pads must cover the lead; pegs need NPTH; inspect coplanarity.
A complete RFQ line
Example: “2.54mm, 1×10P, 0.64mm square, insulator 2.5mm, mating 6.0mm, solder tail for 1.6mm PCB, straight, tin, tube.”
Junjia customizes pin length and insulator height. Send board thickness, the mating part and lid limit with the drawing.