EJ-21 PANEL MOUNT DC SOCKET

5.5 x 2.1mm Panel Mount DC Socket Precision Power Interface

This Panel Mount DC Socket is a high-quality female power connector designed for secure installation into project enclosures and industrial control panels. Featuring a standardized 2.1mm center pin, it provides a reliable docking point for common AC-DC power adapters, ensuring stable power delivery for various electronic systems.

Key Performance Features

• Standardized 2.1mm x 5.5mm Interface: Perfectly matches the most common DC barrel plugs used in electronics, including those on many battery holders like the EH-AAX4B/DC.

• Secure Threaded Panel Mounting: Equipped with a metal hexagonal nut and washer for a firm, vibration-resistant fit on chassis or faceplates.

• Dual Solder Lug Terminals: Features two distinct solder-type terminals on the back for easy and secure wiring of positive and negative power rails.

• Durable Metal & Polymer Construction: Engineered with a robust nickel-plated metal front for frequent plugging cycles and a heat-resistant internal insulator for safe soldering.

• Compact Form Factor: Designed for high-density layouts where space inside the enclosure is limited.

Technical Specifications

• Hole Diameter: 2.1mm Center Pin.

• Outer Diameter Compatibility: 5.5mm Barrel Plugs.

• Mounting Type: Threaded Panel Mount with Lock Nut.

• Termination: Solder Lugs.

Typical Applications

• DIY Electronic Enclosures: The standard power input port for custom Arduino, ESP32, or Raspberry Pi projects.

• Industrial Control Panels: Used as a low-voltage DC power entry point for sensors and signaling equipment.

• Audio Equipment: Ideal for repairing or upgrading power jacks on effects pedals and portable amplifiers.

• Security Systems: Serves as a reliable power interface for CCTV cameras and alarm modules.

Top 3 Customer Questions & Concerns ‍

 How do I identify the positive and negative terminals? Typically, the shorter lug connects to the center pin (usually Positive), while the longer lug connects to the outer barrel (usually Negative). Always verify with a multimeter before powering your circuit.

What size drill bit should I use for the panel hole? You will need a drill bit that matches the outer diameter of the threaded neck. For most standard 2.1mm sockets, an 8mm or 11/32" hole provides a perfect fit.

 Can this handle high current? These sockets are typically rated for standard low-voltage applications (up to 3A-5A). For high-power motors or large heating elements, ensure your wiring and the socket's rating match your load.