DC Power Supply Female Barrel Jack Socket (5.5mm x 2.1mm - Panel Mount)

When you are designing an electronics enclosure and need a clean, professional way to bring in DC power from a standard wall adapter, this 5.5mm x 2.1mm female barrel jack socket is the industry standard solution. Designed to perfectly mate with the most common AC-to-DC power supplies (like standard 5-Volt, 9-Volt, and 12-Volt adapters), it provides a secure, snug fit that prevents accidental power disconnects and intermittent power drops.

This specific variant features a threaded barrel and an included hex nut, making it incredibly easy to securely mount into a drilled hole on any plastic, wood, or metal project panel. It features three internal solder terminals—one for the center positive pin, one for the outer negative sleeve, and a third switched terminal that can be used to automatically disconnect an internal battery when an external wall adapter is plugged in. Whether you are building a custom audio amplifier, an IoT sensor hub, or a robotics controller base, this socket gives your project a finished, commercial-grade power input.

Key Features & Functional Advantages

• Universal Standard Size: Features the highly ubiquitous 5.5mm outer diameter and 2.1mm center pin, ensuring compatibility with the vast majority of hobbyist and commercial power adapters.

• Panel Mount Design: Equipped with a threaded outer housing and a securing nut, allowing for robust, permanent installation into project boxes and custom faceplates.

• Internal Switching Contact: Includes a third solder lug that physically breaks contact when a plug is inserted, allowing you to easily design circuits that seamlessly switch from internal battery power to external wall power.

• Robust Construction: Built with durable plastic and thick metal solder lugs that can easily withstand the heat of hand-soldering and the mechanical stress of repeated plugging and unplugging.

• Clean Aesthetics: Provides a flush, professional-looking power entry point that elevates the appearance of any DIY electronics project.

Perfect For

• Custom Enclosures: The absolute best way to add a dedicated power input port to 3D-printed cases, extruded aluminum project boxes, and acrylic panels.

• Battery-Powered Devices: Utilizing the built-in switch to automatically disable an internal 9-Volt or double-A battery pack when a wall adapter is connected, saving battery life.

• Audio and Lighting Projects: Providing the necessary physical connection to power custom guitar pedals, LED strip controllers, and small desktop amplifiers.

• Arduino and Microcontroller Hubs: Creating a robust power entry point for custom logic boards that require a dedicated external supply.

Technical Specifications

• Connector Type: DC Female Barrel Jack Socket

• Inner Pin Diameter: 2.1 millimeters

• Outer Hole Diameter: 5.5 millimeters

• Mounting Style: Threaded Panel Mount (with securing hex nut)

• Maximum Current Rating: Typically rated up to 3 Amps

• Maximum Voltage Rating: Up to 30 Volts DC

• Number of Terminals: 3 (Center Pin, Outer Sleeve, and Switched Contact)

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Please note, a delivery fee of €4.99 applies for orders under €50. For those in remote areas, be aware that our couriers may apply an extra surcharge. This additional fee helps cover the costs of transporting your items to harder-to-reach locations.