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In PCB design and SMT component selection, pin pitch and contact foot width are two important dimensions of a female header connector. While pin pitch is widely known, contact foot width is often overlooked or confused with Other specifications.
Contact foot width refers to the lateral width of the metal soldering foot on a surface-mount Female Header. It specifically describes the width of the portion soldered to the PCB pad and is different from pin length, overall Connector width, and pin pitch.
For commonly used 2.54 mm female headers, the contact foot width is typically around 0.6–0.64 mm, depending on the connector design. The corresponding PCB pad is generally designed slightly wider to provide sufficient soldering area while maintaining proper clearance between adjacent pads.
Contact foot width directly affects soldering reliability. If the foot is too narrow, the soldering area may be insufficient, increasing the risk of weak joints, poor electrical contact, or detachment. If it is too wide, the connector may not properly match the PCB footprint and can increase the risk of solder bridging between adjacent pads.
The two specifications have different functions:
Pin pitch: The center-to-center distance between adjacent pins, determining the connector's pin arrangement.
Contact foot width: The width of each metal soldering foot, affecting its fit with the PCB solder pad.
When selecting a female header connector, engineers should therefore consider both dimensions along with the manufacturer's recommended PCB footprint.
Although contact foot width is a relatively small specification, it plays an important role in PCB compatibility, SMT assembly, and long-term connection reliability.
Choosing the correct female header connector can help ensure reliable PCB assembly and stable electrical connections. If you are looking for female headers with specific pitch, foot width, mounting style, or other customized specifications, please contact our team for product details and sourcing support.
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