Common specifications of power adapter DC plug

Common specifications of power adapter DC plug
The DC plug of the power adapter is also referred to as the DC head for short. It is a connector for the power adapter to connect to the product it is charged by. It is a metal hollow cylindrical contact body adopted by a tuning fork DC side by a tuning fork type metal contact shrapnel or a straight plug DC side, insulated base, horizontal socket, vertical socket, directional keyway, etc. The inner and outer diameter specifications of the power adapter DC plug are 5.5*2.5, 5.5*2.1, 4.75 *1.7, 4.0*1.7, 3.5*1.35, 3.5*1.1, 3.2*0.9, 3.0*1.1, 2.5*0.7, 2.35*0.7, 2.0*0.6 etc., and the unit is mm.

The DC plug connection method of the power adapter is that two fork-shaped contact shrapnels are positioned in the center of the base (tuning fork DC head) or a smooth hollow metal cylinder is positioned in the center of the base (in-line DC head) in a vertical and horizontal arrangement. Not connected to each other. The outside of the insulating base cylinder is also a hollow metal cylinder (there is no difference between the exposed metal connection part of the tuning fork type and the direct plug-in DC head), which is connected to the inside and outside of the socket to make the power supply and the product connected to it. Power supply to make it work normally

The inner diameter and outer diameter specifications of the DC plug of the power adapter are as follows (unit: MM):
5.5*2.5
5.5*2.1
4.75*1.7
4.0*1.7
3.5*1.35
3.5*1.1
3.2*0.9
3.0*1.1
2.5*0.7
2.35*0.7
2.0*0.6
...

The power adapter DC plug length specifications are 8/10/12 (unit is MM), etc.

The shape of the power adapter DC plug is generally divided into straight and elbow, and the matching DC socket is divided into two packages, SMT chip package and DIP plug-in package.

Power adapter DC plugs and DC power sockets are generally used in audio-visual products, digital products, monitoring products, communication products, household appliances, security products, toy products, computer peripheral products, fitness and health products, As well as medical products, video products, IT products and other products.

In addition to the two most common DC plugs, the power adapter tuning fork DC plug and the power adapter direct-plug DC plug introduced above, there are also USB heads, micro USB heads, and mini USB heads that are widely used in communication and IT products. , There are 3 cores/4 cores / 5 cores / 8 cores connector audio head, S-terminal refrigerator head, cigarette lighter head, F head, T head, DC straight plug female head, aviation head, waterproof head, alligator clip, Banana head and so on DC head.

Poor quality of the power adapter DC plug and DC power socket will cause poor contact or DC hair hot or even melt, so a small DC plug quality problem will have a direct relationship with the quality of the power adapter product.