Dc Power Connectors

There are many standards for dc connectors and perhaps even more versions of non-standard connectors. The standard connectors are barrel connectors, DIN connectors, and USB connectors.

AC-DC Power adapters are widely used in various industries, such as POS, cash registers, smart security, commercial display advertising machines, facial recognition intelligence, scanners, etc.

Barrel Connectors

Barrel connectors are perhaps the most common design for dc power connectors because they are inexpensive to manufacture due to loose mechanical tolerances and have no required orientation when plugging them together.

The most common form of barrel connectors has plugs constructed with concentric metal sleeves (barrels) separated by an insulator. Many standard diameters are available for both the inner and the outer sleeves and the length of the plug barrel. Common combinations of the diameters and length the th exist, but the design engineer will still need to specify the desired dimensions for the plugs used in their products.

Different applications have different DC connector size requirements for power supplies. The types of DC connectors can be roughly divided into the following:

1. OD2.5mm*ID0.7mm (DC2507): mainly used for tablet computers and other small electronic products with relatively limited volume, mini electronic products, etc.

2. OD3.5mm*ID1.35mm (DC35135): mainly used for network set-top boxes, USB HUB external power supply, network cameras, LED desk lamps, etc.

3. OD4.0mm*ID1.7mm (DC4017): mainly used for mobile DVD, EVD, PSP, and some network set-top boxes.

4. OD5.5mm*2.1mm (DC5521): currently the most widely used DC round head interface. Surveillance cameras, some set-top boxes, LED lighting, digital home appliances, printers, scanners, etc.

5. OD5.5mm*ID2.5mm (DC5525): mainly used for equipment with slightly larger power, like some laptops, electric bikes, monitor etc.

The most commonly used of the above barrel connectors are OD5.5*ID2.1mm and OD5.5*ID2.5mm. This kind of DC connector specification power supplies accounted for more than 95% of our company's shipment rate.

In addition to the electrical characteristics of the input and output voltages and currents of power supplies, connectors also must be specified for the supplies. Ac input connectors are reasonably well standardized and thus limited in selection for the intended power levels and international markets. In contrast , dc output connectors are not as standardized and thus the designer has many more decisions to make. The output dc power plug should be rated for the output voltage and current and must conform to the desired mechanical characteristics of the product. KSPOWER has techn ical and sales support staff who can help to advise on power connector decisions for power supplies.