This Pololu 1×40 straight male header is a 0.1\" (2.54 mm) pitch breakaway pin strip with extra-long pins on both sides of the plastic spacer. You can snap or cut it to the exact length you need, making it a handy “one part fits many jobs” connector for prototyping and custom wiring.
Compatibility-wise, the 2.54 mm spacing matches standard Arduino shield headers, breadboards, perfboard/stripboard and most 0.1\" female sockets. The key difference from typical male headers is the double-sided long pins: it can act as a female-to-male adapter when plugged into a female header, and both ends are suitable for wire-wrap. It’s not the right choice where you specifically need short solder tails (for low-profile builds or guaranteed standoff height), or where the mating connector expects a different pitch.
Typical uses include making removable connections between boards, bringing signals through a board so you can connect on both sides, building quick adapter “stacks” with female headers, and wire-wrap prototyping without needing a separate long-tail pin strip. Compared with standard breakaway male headers (short solder side), this one is more versatile for pass-through and wire-wrap, but can sit taller and may be less tidy in tight enclosures.
Useful complements: pair it with matching 0.1\" female headers for plug-in adapters, or use it with prototyping boards for permanent builds.
Key Features
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0.100 (2.54 mm) Breakaway Male Header: 1x40-Pin, Straight, Double-Sided
This single-row, 40-pin straight male header strip with 0.1" (2.54mm) pitch features extended pins on both sides of the plastic spacer. The breakaway design ...
This single-row, 40-pin straight male header strip with 0.1" (2.54mm) pitch features extended pins on both sides of the plastic spacer. The breakaway design lets you snap or cut it into any length you need.
Unlike standard male headers where one side is short (for soldering), this double-sided version has long pins on both sides. This makes it useful as a female-to-male adapter when inserted into a female socket, and both sides are compatible with wire wrap connections.
Key Features
- 1×40-Pin Single Row – Breakaway design, snap or cut to any length
- Double-Sided Long Pins – Extended pins on both sides of the plastic spacer
- Straight Orientation – Standard vertical mounting
- 0.1" (2.54mm) Pitch – Industry-standard spacing for broad compatibility
- Wire Wrap Compatible – Both pin sides work with wire wrap connections
Ideal For
- Female-to-male header adapters
- Wire wrap prototyping
- Through-board connections requiring pins on both sides
Package Contents
- 1× 1×40-pin straight double-sided breakaway male header
Jargon buster
Plain-language definitions for the technical terms used above.
- Headers
- Rows of metal pins used to plug a module into a breadboard or connect it with jumper wires. Pre-soldered headers make the module easier to use straight away without needing to solder the pins yourself.
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