Pin header and female header matching guide

How to Match Pin Headers and Female Headers Before RFQ

To match a pin header with a female header, do not confirm pitch alone. Pitch, row count and pin count define the layout, but a reliable match also needs pin size, mating length, female contact depth, plastic body height, solder tail length, PCB thickness, mounting direction and plating.

Engineering reference summary

Matching pitch alone does not confirm compatibility.
Confirm pin cross-section and contact structure, insertion depth, body height, rows and positions, orientation and plating.
Final board-to-board height depends on the complete mating pair and PCB assembly.
Replacement work should include the fixed connector drawing or sample, PCB thickness, board spacing and mating-cycle requirements.

Use scope: Kirision RFQ engineering reference. Dimensions and fit are application-specific and should be confirmed against the project drawing, sample, PCB and assembly process.

Content updated: July 13, 2026.

Female header product image for checking contact opening, accepted pin size, body height and mating depth — Female header side used to distinguish matching review from pin header tail length review.

For RFQ, send the drawing or sample photo for both sides if available. If only one side is available, mark the connector that must remain unchanged and describe the target mating part.

Why same pitch is not enough

Two connectors can both be 2.54mm pitch and still fail to mate correctly. The pin may be too thick for the female contact, the pin may enter only part of the socket, the female header body may be too high for the enclosure or the solder tail may not suit the PCB thickness.

This is why a buyer should not request only "2.54mm pin header and female header, 2x20P." That description is useful, but it is not complete enough for a dependable replacement or custom quote.

Dimensions to confirm before quotation

Item	What to confirm	Why it matters
Pitch	1.27mm, 2.00mm, 2.54mm or other pitch	Defines PCB layout and product series
Pin count	Total contacts and row count	Confirms length and tooling direction
Pin size	Square pin size, round pin size or stamped contact	Affects mating fit and insertion force
Female contact depth	Internal contact length and entry structure	Controls reliable mating engagement
Exposed pin length	Pin length above the plastic body	Must be long enough to enter the female header
Plastic height	Body height of each connector	Affects board spacing and component clearance
Solder tail length	Tail below the body or below the PCB	Must suit PCB thickness and soldering process
Mounting direction	Straight, right-angle, SMT or through-hole	Changes mechanical fit and PCB footprint
Plating	Tin, gold flash or selective gold	Affects soldering, contact reliability and cost

Check the pin header side

Start with the pin header drawing or sample. Confirm the pitch, single-row or dual-row layout, pin size and exposed mating length. For through-hole parts, confirm the solder tail length and PCB thickness. For right-angle parts, confirm the bend position and distance from the PCB edge.

The exposed mating length is important. If it is too short, the female contact may not grip the pin properly. If it is too long, the pin may bottom out, interfere with nearby parts or create unwanted exposed metal.

Check the female header side

Female header section drawing showing contact opening, contact depth, body height and solder tail for matching review — Cropped female header section view for contact opening, contact depth, body height and solder tail review.

For the female header, the outside shape is not enough. Confirm the contact opening, accepted pin size, internal contact depth, plastic body height, row count and solder tail length.

If the drawing includes a section view, use it. A section view is more useful than a top view because it shows how deep the pin can enter and where the internal contact sits.

When board-to-board height matters

Board-to-board height should be treated as an assembly dimension, not a single connector dimension.

Pin header plastic height.
Exposed mating length.
Female header body height.
Female contact depth.
Insertion depth after mating.
PCB thickness.
Solder tail clearance.
Components between the two boards.

For this reason, a quote request such as "need 11mm stack height" can be unclear. It may mean 11mm between PCB surfaces, 11mm total connector body height or 11mm clearance inside the enclosure.

Replacement parts need more evidence

For replacement sourcing, send more than a catalog photo. Useful evidence includes existing part photos from top, side and mating direction, caliper measurements, PCB thickness, row count, mating connector photo or drawing, application notes and any old marking or part number.

If a physical sample is available, keep one sample unmodified. Cutting or desoldering the only sample can remove details needed for comparison.

A practical RFQ example

Weak RFQ: Need 2.54mm pin header and female header, 2x20P, quote price.

Better RFQ: We need a 2.54mm dual-row pin header and matching female header, 2x20P. The assembly uses two parallel PCBs. PCB thickness is 1.6mm. Straight through-hole mounting is preferred. Target PCB-to-PCB distance is 11.0mm. Pin header tail length should be suitable for wave soldering. Tin plating is acceptable unless gold flash is recommended for the mating side. Drawing and sample photos are attached. Trial quantity is 1,000 pairs, with expected batch demand of 10,000 pairs.

Common matching problems

Problem	Result
Same pitch but wrong pin size	High insertion force or loose contact
Exposed pin length too short	Unstable mating engagement
Exposed pin length too long	Bottoming out or exposed conductive risk
Female header body too high	Board spacing exceeds mechanical limit
Tail length not checked with PCB thickness	Poor soldering fit or bottom-side interference
Plating selected only by appearance	Unnecessary cost or wrong contact performance
No mating connector information	Supplier can quote a part that fits the PCB but not the assembly

What to send for fast review

Pitch.
Pin count and row count.
Mounting type.
Pin size.
Pin header drawing or sample photo.
Female header drawing or sample photo.
PCB thickness.
Required board spacing or enclosure clearance.
Plating requirement.
Estimated quantity.

Send a connector RFQ

Send drawing, sample photo, BOM, STEP, DWG or PDF files. Kirision can review pitch, rows, positions, mounting style, height, tail length, mating connector, plating, quantity and export document requirements before quotation.

ISO 9001 quality management documentation can be provided for qualified RFQ projects. RoHS material compliance review is available on request when export projects require it.

Send RFQ

FAQ

Can a 2.54mm pin header mate with any 2.54mm female header?

No. Pitch must match, but pin size, contact structure, insertion depth, body height and plating also need to be checked.

Is board-to-board height decided by the female header?

No. Board-to-board height depends on the full mating pair and the PCB assembly. The female header is only one part of the height calculation.

What if only one connector side is fixed?

Send the fixed connector drawing or sample photo first. The matching connector should be selected around that part, not guessed from pitch and pin count alone.

Do all matching pairs need gold plating?

No. Tin plating is common for many soldered PCB connectors. Gold flash or selective gold may be considered when contact reliability, mating cycles or application conditions require it.

Can Kirision review a custom pin header and female header pair?

Kirision can review custom or replacement requirements by drawing, sample photo, PCB information and quantity. Feasibility depends on connector structure, available tooling, tolerance, plating and order volume.

Products referenced in this guide

Start from the matching series, then confirm pitch, rows, height, tail length, plating and drawing details by RFQ.

Kirision 2.54mm pin header connector product photo

View product catalog Send RFQ with drawing

Related Kirision pages