This 0.100\u2033 (2.54 mm) 3\u00d74 straight female header is a 12-pin, triple-row socket strip for making compact plug-in connections to standard 0.1\u2033 male pin headers. It\u2019s a handy choice when you need more contacts in a small area than a single- or dual-row header can provide, while still staying within the common 2.54 mm prototyping ecosystem.
Compatibility-wise, it mates with 2.54 mm pitch male headers/pins (including standard breakaway male headers and many module pin strips). It\u2019s designed for through-hole PCBs/perfboard and mounts straight (vertical). It won\u2019t suit 2.0 mm pitch systems, JST-style wire-to-board connectors, or boards laid out for single-row or 2\u00d7N headers unless the matching 3\u00d74 footprint is present.
Practical uses include custom button/LED matrices, compact interconnects between stacked PCBs, specialised sensor/module breakouts, and space-constrained prototypes where a longer 2\u00d76 header would clash with other components. Compared with single-row female headers, this offers higher density in a smaller edge length; compared with IDC box headers, it\u2019s simpler and lower-profile but doesn\u2019t provide keyed, ribbon-cable-friendly alignment.
Suggested complements: use with matching male pins (e.g. a breakaway header) and prototyping substrates like Perfboard or Breadboard (choose based on your project), plus solid-core hookup wire for jumpers.
Key Features
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Pololu
0.100 (2.54 mm) Female Header: 3x4-Pin, Straight
The 0.100″ (2.54 mm) 3×4-Pin Straight Female Header is a triple-row, 12-pin socket strip designed to mate with standard 0.1″ pitch male headers. Its unusual ...
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The 0.100″ (2.54 mm) 3×4-Pin Straight Female Header is a triple-row, 12-pin socket strip designed to mate with standard 0.1″ pitch male headers. Its unusual three-row configuration provides a compact, high-density connection in a small footprint.
A 3×4 arrangement is useful for custom matrix interfaces, specialised module connections, and applications where a standard dual-row header would be too long for the available board space.
Key Features
- 0.1″ (2.54 mm) Pitch – Industry-standard spacing compatible with perfboard and PCBs
- Straight Orientation – Mounts perpendicular to the PCB for standard vertical connections
- 3×4-Pin Configuration – Triple-row, 12-position socket for high-density connections
- Through-Hole Mounting – Solders directly to standard PCBs
Ideal For
- Custom matrix and grid interfaces
- High-density module connections
- Space-constrained PCB layouts
- Prototyping and specialised interconnects
Package Contents
- 1× 0.100″ (2.54 mm) 3×4-Pin Straight Female Header
Jargon buster
Plain-language definitions for the technical terms used above.
- Headers
- Rows of connector contacts on a fixed pitch (commonly 2.54 mm) used to link a board to a breadboard, jumper wires, or another board. They come as male pin headers and female socket headers; when a module ships with pre-soldered headers it can be used straight away, whereas bare pads require soldering the pins yourself.
- PCB
- A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
- through-hole
- A mounting style where the component leads pass through holes in a circuit board and are soldered on the other side. Through-hole parts are often easier to handle and solder by hand, which is useful for classroom and hobby projects.
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