5.5*2.1 DC jack connector

The 5.5 x 2.1 DC jack is the most widely used DC power connector in the electronics industry. Its standardized barrel dimensions—5.5mm outer diameter and 2.1mm inner diameter—make it compatible with thousands of off‑the‑shelf AC‑DC adapters, battery chargers, and power supplies worldwide. This 5.5mm x 2.1mm DC jack is a female PCB‑mount receptacle, meaning the power plug inserts directly into the jack soldered onto the board. The through‑hole design provides robust mechanical retention, ensuring the connector withstands repeated plug insertions and cable tugs without loosening from the PCB.

Often referred to as a DC barrel jack 5.5 x 2.1, this connector is available in multiple pin configurations to suit different circuit requirements. The DC-021 includes a built‑in normally‑closed switch that opens when a plug is inserted, enabling automatic battery disconnect or external power detection—a valuable feature for battery‑backed devices and portable instruments. Whether you are designing a consumer gadget, an industrial controller, or a medical device, this PCB DC power jack provides a proven, cost‑effective power entry solution.

• 15+ Years Manufacturing – trusted supplier of electromechanical connectors for global OEMs.
• OEM & ODM – custom barrel sizes, pin configurations, and plating options available.
• ISO 9001 Quality Control – consistent product quality backed by rigorous testing.
• Engineering Support – CAD models, footprint libraries, and application notes provided.
• Fast Sampling – prototype samples shipped within days for evaluation.
• Worldwide Shipping – flexible logistics to keep your production on schedule.

The 5.5 x 2.1 DC jack is one of the most widely used DC power interfaces for consumer electronics, industrial control systems, LED lighting, and networking equipment. Its standardized barrel size ensures compatibility with a broad range of power adapters while providing reliable electrical contact. When specifying a 5.5 x 2.1 DC power jack, engineers must consider barrel size tolerance, current rating, and mechanical life—all of which the DC-021 addresses with its precision‑molded housing, copper alloy contacts, and 5,000‑cycle durability.

As a DC barrel jack 5.5 x 2.1 supplier, Vistar Electronics manufactures PCB mount DC power jacks in multiple pin configurations, mounting styles, and contact plating options. This PCB DC power jack is fully RoHS and REACH compliant, with OEM and ODM customization available for global customers. Explore our DC power connector portfolio: DC Power Connector Category, 3 Pin DC Jack, 4 Pin SMD DC Jack, Right Angle DC Jack, and Waterproof DC Jack. For technical guidance, see our articles on DC Jack Connector Types Explained, 5.5 × 2.1 mm vs 5.5 × 2.5 mm DC Jack, How to Choose a DC Power Jack, and DC Barrel Connector Guide. For industry standards, refer to IEC Standards. To request a free sample of the DC-021 or discuss your requirements, contact sales@vistarelectronics.com.