The standard USB interface size is 12 x 4.5mm, the specific dimensions are as follows:
Technical parameters of the USB interface:
1.Physical contact: copper alloy.
2, contact area: 30μ gold nickel-plated.
3, solder tail area: gold plated nickel.
4, Shield: stainless steel.
5, Functional temperature range: -55 ° C to + 85?C, according to the test connector without damage.
Extended information:
The USB is a commonly used pc interface, there are four wires, two The USB interface is a commonly used pc interface with 4 wires, two power supplies and two signals, so the signals are transmitted serially. usb interface is also known as the serial port, usb2.0 speed can reach 480Mbps. it can meet a variety of industrial and civil needs. the output voltage and current of the USB interface is: +5V 500mA in fact, there is an error, the maximum can't be more than +/-0.2V, that is, 4.8-5.2V.
The 4 wires of the usb interface are generally distributed as follows, and it should be noted that the positive and negative poles should not be reversed, or it will burn out the usb device or the computer's south bridge chip: black line: gnd red line: vcc green line: data+ white line: data-.
Baidu Encyclopedia-USB Interface