DC Barrel Power Jack Plug Connector

DC Barrel Power Jack Plug Connector is a standard, highly reliable hardware connector designed to establish secure and clean direct current (DC) power connections between power supplies, adapters, and electronic circuits. Featuring the widely adopted 5.5mm x 2.1mm coaxial barrel standard (with a 2.1mm center pin), this connector set provides a sturdy physical interface for routing low-voltage DC power. Available in male plug (with screw-terminal blocks or solder tabs) or female jack (panel-mount and PCB-mount) configurations, it is an essential component for powering Arduino projects, LED strip installations, CCTV cameras, router adapters, and custom robotics enclosures without wire splicing.

Features

• Industry-standard 5.5mm outer diameter and 2.1mm inner pin diameter compatible with most standard 9V, 12V, and 24V DC power adapters
• Available in multiple configurations including screw-terminal plug adapters (no soldering required) and solder-tag chassis/PCB jacks
• Robust molded plastic housing with strain relief and nickel-plated metal contacts ensuring low electrical resistance and corrosion resistance
• Clearly marked polarity indicators (Positive center pin + and Negative outer sleeve -) preventing incorrect reverse power wiring
• High current-handling capacity safely supporting continuous low-voltage DC loads up to 5A
• Secure mechanical snap-fit or threaded panel mounting ensuring reliable connection even under vibration or movement
• Essential hardware accessory for custom power distribution boxes, DIY test benches, and consumer electronics

Applications

• Connecting 12V/24V power adapters to Arduino development boards, motor drivers, and LED strip controllers
• Power input ports for custom electronics enclosures, test benches, and benchtop power supplies
• CCTV security camera power wiring, wireless router adapters, and battery charger leads
• Robotics power distribution harnesses and portable gadget charging lines
• Polytechnic diploma, university engineering thesis, and DIY electronics power assembly projects

Important Notes:

• Polarity Verification: Standard DC barrel jacks follow the convention where the center pin is Positive (+) and the outer barrel is Negative (-). Always verify your power adapter's polarity with a multimeter before plugging it into your circuit.
• Size Matching: Ensure you match the correct pin size. A 2.1mm plug fits loosely on a 2.5mm jack center pin, which can cause intermittent power disconnections or sparking under load.
• Screw Terminal Tightening: If using screw-terminal adapter plugs, strip roughly 5mm of wire insulation, insert the bare copper securely into the terminal block, and tighten the screw firmly to prevent loose contact heating.
• Current Limitations: While rated up to 5A, avoid running continuous high-amperage loads (above 3A) through cheap low-grade connectors to prevent excessive terminal heating.

Package includes

• 1 x DC Barrel Power Jack / Plug Connector (Male or Female variant as specified)