Standardize your power connections with our high-quality 5.5mm x 2.1mm DC Power Plug. Featuring a 9mm barrel length, this plug is the most common size for low-voltage electronics. It is the perfect choice for repairing broken power adapter tips, building custom extension cables, or creating high-current leads for DIY projects. From powering microcontrollers to LED strips, this connector is the industry "go-to" for reliable DC delivery.
DIY Electronics: The native power plug for Arduino (Uno/Mega), Raspberry Pi (via DC-to-USB), and most development boards.
CCTV & Security: Ideal for terminating power lines for security cameras and DVR units.
Consumer Electronics: Replace damaged tips on routers, modems, and small audio-visual appliances.
Precise 9mm Barrel Length: Designed to fit standard-depth DC jacks perfectly, ensuring a secure mechanical and electrical connection without excessive protrusion.
Easy-Solder Terminals: Features internal solder buckets that make it simple to attach 18-24 AWG power wires.
Robust Strain Relief: Includes a screw-on plastic housing with a flexible rubberized boot to protect your solder joints from bending and tension.
High-Conductivity Nickel Plating: Engineered to prevent oxidation and maintain a low-resistance path for stable voltage delivery.
"Standard Fit" Reliability: This is the most widely compatible DC size, ensuring it works with 95% of universal AC/DC adapters.
Heat-Resistant Core: The internal insulator is designed to stay rigid even during prolonged soldering, preventing pin misalignment.
Industrial Resilience: Rated for high mating cycles, making it a dependable choice for equipment that is frequently moved.
Connector Type: DC Barrel Plug (Male)
Size: 5.5mm (Outer Diameter) x 2.1mm (Inner Pin)
Barrel Length: 9mm
Will this fit into a 2.5mm socket?
Yes, but it will be unreliable. A 2.1mm plug will physically enter a 2.5mm socket, but because the inner pin of the socket is larger, the connection will be loose and will likely spark or cut out. Always match sizes for safety.
Is 9mm long enough for my device?
Usually, yes. 9mm is the standard length. Some ruggedized devices or recessed ports require an 11mm or 14mm "Long-Reach" barrel. If your port is deeply recessed, measure before purchasing.
What color is the insulator?
Standard 2.1mm plugs usually have a Black insulator ring, while 2.5mm plugs often have a Yellow ring. (Always verify by measuring to be 100% sure).
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