1.27mm Female Headers and Fine-Pitch PCB Sockets

1.27mm Female Headers and Fine-Pitch PCB Sockets

This collection centers on 1.27mm (0.05-inch) female header sockets for compact PCB interconnects. The current six listings include single-row straight, right-angle and SMT sockets; dual-row vertical SMT sockets; low-profile dual-row SMT male/female options; and single-row mixed male/female strips. Two additional products are a 1.27mm jumper cap and a 1.27mm-pitch SMD DIP switch, not female header sockets.

Female Header Formats Available

• Single-row 1×50 female socket strips in straight, right-angle and SMD formats
• Single-row female options in selected 2–50-position sizes within a mixed male/female listing
• Dual-row vertical SMT female headers in selected 2×3 through 2×20 layouts
• Low-profile dual-row SMT female headers in selected 2×3 through 2×50 layouts
• Standard-profile variants described around 4.3mm body height and low-profile variants around 2.0mm, where stated

How to Select

1. Confirm 1.27mm center spacing and the required row spacing.
2. Select female rather than male on mixed-gender listings.
3. Choose single-row 1×N or dual-row 2×N. A 2×10 socket has 20 total contacts.
4. Select straight through-hole, right-angle through-hole or SMT to match the PCB footprint.
5. Check body height, mating depth, tail length, lead layout and overall clearance.
6. Verify package quantity: listings currently include 10-, 20- or 100-piece formats.

Standard vs. Low-Profile Sockets

Body height changes the mated stack height and available contact engagement. A low-profile socket is not automatically interchangeable with a standard-height socket even when pitch and position count match. Compare the male-post length and both component drawings.

Male/Female Mixed Listings

Several listings offer male and female parts as separate variants. Selecting a position count does not guarantee the socket is female; the gender or insert-type option must also be checked. Male headers are not included unless specifically selected or stated as a pair.

JTAG, SWD and Debug Interface Boundaries

1.27mm sockets can be used in compact programming and debug connections, but pitch and contact count do not define a complete JTAG or SWD interface. Verify row layout, shroud, keying, orientation, pin assignment and mating post dimensions. These open sockets are not automatically compatible with every keyed debug connector or probe.

Other 1.27mm Products in This Collection

The jumper-cap listing is a two-contact shorting link intended for an appropriate 1.27mm header. The SMD slide DIP-switch listing uses 1.27mm terminal spacing but is a switch, not a header socket. Their materials, ratings and applications must not be generalized to the female headers.

Electrical, Material and Compliance Limits

Source listings contain differing values for dielectric withstand and insulation resistance, along with individual claims for current, temperature, phosphor bronze, gold flash, RoHS, CE or CCC. No one set of those specifications is published as a collection-wide guarantee. “0.5 inch” in one source description is also incorrect for 1.27mm; the correct inch conversion is 0.05 inch.

Determine ratings from the exact selected part, mating header, PCB footprint, loaded contacts, ambient temperature and assembly process. Validate samples before production.

Frequently Asked Questions

Is 1.27mm equal to 0.05 inch?
Yes. 1.27mm equals 0.050 inch.

Will any 1.27mm male header fit these sockets?
No. Post dimensions, row spacing, mating depth, body clearance and orientation must match.

Are all six products female headers?
No. The collection also contains a jumper cap and an SMD DIP switch, and some listings mix male and female variants.

Are all sockets through-hole?
No. The range includes through-hole and SMT options.

Are all parts rated 1A and 500V?
No. Source values differ and must be verified for the selected variant.

Does a 2×10 socket guarantee JTAG compatibility?
No. Verify the complete mechanical layout and signal pinout.

Ordering Checklist

Confirm pitch, row spacing, rows, contacts per row, female variant, mounting style, PCB footprint, body height, mating-post geometry, orientation, package quantity, required ratings and interface pinout.