The DC Power Jack Connector: What It Is and How It Works

DC Jack power connectors are an essential component of modern electronic devices that rely on a direct current (DC) power supply. If you need to connect external power sources, such as AC adapters or batteries, to electronic devices like laptops, tablets, routers, or other electronics that require a steady DC power supply, then DC power connectors are the way to go.
The DC Power Jack Connector What It Is and How It Works Featured Image

About Power Connectors  

Electrical devices require a secure and reliable transfer of power, which is provided by power connectors. Designers make these connectors to be an essential electrical component that allows the safe and efficient transfer of power from one device to another. DC Power Jack connector is one of them.

Power Connectors

DC Power connectors come in a variety of shapes and sizes, and they are typically designed to meet the voltage and amperage requirements of the device being powered. The power connectors are made up of two or three metal prongs that are mounted on a printed circuit board (PCB) of the device or on a separate power jack board. 

Some common types of power connectors include: 

  • AC power plugs: used to connect devices to wall outlets 
  • DC power Connector (jacks): used to connect devices to power supplies or batteries 
  • USB connectors: used to provide power to and transfer data between devices 

Different Types of DC Power Connectors 

IEC DC power connectors are a type of dc power connector that conforms to the International Electrotechnical Commission (IEC) standard. There are several types of IEC DC power connectors available, including:

  • Type A: 5.5 mm OD, 2.5 mm: It is a coaxial power connector with a male plug that has a central pin for the positive voltage and an outer shell for ground connection. Amplifiers and mixers commonly use this equipment in audio applications.

  • Type B: 6.0 mm OD, 2.5 mm: It is a coaxial power connector with a female jack that has a central hole for the male plug’s central pin and a threaded outer shell for the negative or ground connection. Routers, modems, and external hard drives are among the many electronic devices that commonly use this equipment

  • Type C: 3.8 mm OD, 1.1 mm: This is a DC power connector with a male plug that has two pins for the positive and negative connections. This equipment is commonly used in automotive and marine applications.

  • Type D: 6.3 mm OD, 3.1 mm: This is a DC power connector with a female jack that has two holes for the male plug’s two pins. It is commonly used in LED lighting and other low-power applications.

  • Type E: 3.4 mm OD, 1.3 mm: This is a DC power connector with a male plug that has three pins for the positive, negative, and ground connections. It is commonly used in electronic devices, such as laptops and printers.

What is a DC Power Jack Connector and How Does It Work? 

DC Jack power connectors have become a widely known feature of modern technology, and their dependability and durability are critical for ensuring that electronic devices work properly. To avoid compatibility issues or damage to electronic equipment, it is critical to understand the distinct types of DC Jack power connectors as well as select the appropriate connector for a given device.

DC Connectors

Understanding Different Types of DC Power Jack Connectors 

DC Jack Power connectors are classified into several types, each with its own design, shape, and size. Here are a few examples of the most common types: 

1. Barrel Connector: This is one of the most common types of DC Jack connectors. It consists of a cylindrical male plug and a female jack. The male plug has a center pin with female jack has a hole of the same radius as the pin. 

2. Coaxial Power Connector: Similar to a barrel connector this sort of Jack connector has a cylindrical design. with a central pin and an outer ring that serves as the ground connection, while the central pin carries power. 

3. Screw Terminal Connector: Designed to secure wires and provide a reliable connection for high-current applications. This type of Jack connector with screw terminals is an excellent choice.

4. DC push-on Terminal Connector: A push-on DC plug or snap-in DC plug is simply a type of power connector for quick connection, consisting of a male plug and a female jack.

Standard sizes for dc connectors are 5.5mm (outer) x 2.1mm (inner) and 5.5mm x 2.5mm.
Here are some common voltage ratings for power coaxial connectors include 5V, 9V, 12V, and 24V,

Barrel Connectors 

The most common type of barrel connectors have plugs made of circular iron sleeves (barrels) isolated by an insulating layer. The barrel jack has a pin that fits into the plug’s inner sleeve, frequently having a loose clearance and a spring that makes contact with the plug’s sleeve. 

It is important to note, however, that not all barrel power connectors are the same. Different barrel connectors can have varying sizes, shapes, and pin configurations. It is critical to select a connector that matches the device’s power requirements to avoid damage to the device or power supply. 

Barrel Connector
Image: cuidevices

Power coaxial connector 

A dc power connector with a cylindrical outer shell and a central pin is known as a coaxial power connector. A coaxial DC power plug, coaxial power jack, or simply coaxial connector is another name for it. The central pin carries the positive voltage, while the outer shell carries the negative or ground connection. It is usually threaded to fasten it to the power input of the device or to the power supply.

Coaxial(DC) Connector

DC Screw Terminal Adapter 

If you are looking for a DC power connector designed for high-current applications. A screw terminal adapter connector is a great option. It consists of a male and female plug with screw terminals for connecting wires to the power source.

The female jack on the device’s circuit board usually has a central hole that matches the diameter of the male plug. By using screw terminal adapter connectors, one can easily replace or upgrade them if the power requirements of the device change.

DC Push on Terminal Connector

The male plug, which has a cylindrical shape with a central pin that carries the positive voltage with a spring-loaded outer sleeve that connects to the negative or ground connection, typically connects to a female jack on the device’s power input. The female jack has a central hole that matches the diameter of the male plug and is mounted on.

To connect the push-a-plug, you simply push the male plug into the female jack until it snaps into place. To disconnect the plug, you push down on the outer sleeve, which releases the connection.  

If you require frequent plugging and unplugging, push adapter plugs are an excellent choice. Due to their ease of connection and disconnection, which offers the advantage of convenience.


In conclusion, a DC power jack connector is a critical component that provides an efficient way to power electronic devices. It consists of a male plug and a female jack that connect to transmit the power source to the device. With proper use and handling, a DC power jack connector can provide a long-lasting power connection for your electronic devices.

Overall, understanding the basics of DC power jack connectors is crucial for anyone working with electronics or powering devices,

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July 18, 2023 12:29 pm

Excellent article! To the pont.

posts info

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