Contact Us
TEL: 86-755-29603651
E-mail: Liu@bestc.com.cn
Address: 5th floor, Shabian Chengdong industry area, Gushu, Bao'an District, Shenzhen, China
Home > Knowledge > Content
How much do you know about the specifications of the USB data cable?
Apr 10, 2018

The same brand of two USB data cable looks the same, the price is not the same, many people do not know why, in fact, the inside know, in addition to USB data cable plug material is different, the more important factor is the specification of the wire inside it The model is not the same, resulting in a completely different function of the two USB data lines, take the charge, the charging speed of the two USB data lines is not the same, a fast, a slow, of course, charging the price is definitely expensive a little.

USB data cable

Generally speaking, USB data lines can be found on the appearance of such words as AWM 2725, E159272, which is the design specification information followed by the line body. The UL and CSA specifications focus on the temperature and voltage values that wire rods can withstand, as well as wire types and suitable uses, and covers a wide range of fields. The power transmission conditions of mobile devices are lower than voltages and currents in households, commercial environments, and industrial applications. In the normal use situation, it is not necessary to pay too much attention to the difference in this aspect. It only needs to know its literal meaning.

If you want to purchase a USB cable for charging, then you only need to pay attention to the AWG specification. The related traces of the wire structure can also be found on the line body. The print type is generally 28AWG/2C+26AWG/2C or 28AWG. /1P, 26AWG/2C, etc. The AWG represents the American Wire Gauge American wire gauge, which is a kind of internal wire composition design specification and is the most commonly used industry standard at present. The number is the number of the wire, which represents the diameter of the wire (in inches).

The smaller the AWG value is, the thicker the wire diameter is, and why the smaller diameter wires are thicker? The emphasis is on the difference in cross-sectional area. Each signal cable of the USB cable is internally composed of many types of fine soft copper wires, tin-plated soft copper wires, and the like. For example, 20 AWG is filled with 26*0.16 wires, and 28 AWG is only 7*0.12 wires. Relatively speaking, the diameter of each wire of 20AWG is relatively thick, and the cross-sectional area is naturally greater than 28AWG. The diameter of these tiny conductors is proportional to the amount of current that can be carried, that is, the thicker the conductor is, the higher the tolerance is.

For the general application of USB data lines, the smaller the AWG value is, the higher the amount of current that can be tolerated is, and the key to this is the cross-sectional area. Of course, the AWG is only an industrial design specification and is based on security. Because of the quality of the wire and the temperature of the environment, it will have a great impact on the conduction characteristics, many of which are difficult to complete one by one, so you can only find a reference point for the design specification. The key concept is to keep your eyes open when buying, and to select as far as possible a thicker appearance of the line body, and a wire with a higher AWG specification.

Previous: What factors will be impedance usb3.0 data line?

Next: How to choose a good data cable