Commodity introduction.
Patch diode, also known as crystal diode, referred to as diode , there are early vacuum electronic diodes; it is a kind of electronic device with unidirectional conduction current. Inside the semiconductor diode, there is a PN junction and two lead terminals. This kind of electronic device has the conductivity of unidirectional current according to the direction of applied voltage. Generally speaking, the patch crystal diode is a pmurn junction interface composed of p-type semiconductors and n-type semiconductors. A space charge layer is formed on both sides of the interface to form a self-built electric field. When the applied voltage is equal to 00:00, the dispersed current and the drift current caused by the self-built electric field are in electrical equilibrium because the carrier concentration difference on both sides of the pmurn junction is equal to the drift current caused by the self-built electric field. This is also the normal characteristic of the diode.
Detailed parameters.

Chip diode tube voltage drop: Silicon diode (non-light-emitting type) forward tube voltage drop 0.7V, germanium tube forward tube voltage drop to 0.3V, LED forward tube voltage drop will vary with different light-emitting colors. There are three main colors, and the detailed voltage drop reference values are as follows: the voltage drop of the red LED is 2.0murmur2.2V, the voltage drop of the yellow LED is 1.8V-2.0V, the voltage drop of the green LED is 3.0V-3.2V, and the rated current during normal light emitting is about 20mA. The voltage and current of the patch diodes are not linear, so it is necessary to connect the corresponding resistors when the different patch diodes are connected in parallel. Chip diode characteristics next to the chip diode, electronic components, a device with two electrodes that only allows current to flow in a single direction. Many uses use its rectification function. The varactor (Varicap Diode) is used as an electronic adjustable capacitor.

商品介绍
贴片二极管又称晶体二极管,简称二极管，别的，还有早期的真空电子二极管;它是一种具有单向传导电流的电子器件。在半导体二极管内部有一个PN结两个引线端子，这种电子器件依照外加电压的方向，具有单向电流的转导性。一般来讲，贴片晶体二极管是一个由p型半导体和n型半导体烧结构成的p-n结界面。在其界面的两边构成空间电荷层，构成自建电场。当外加电压等于零时，因为p-n 结两边载流子的浓度差导致分散电流和由自建电场导致的漂移电流相等而处于电平衡状态，这也是常态下的二极管特性。
                                                                                                                                                         详细参数
贴片二极管的管压降:硅二极管(不发光类型)正向管压降0.7V，锗管正向管压降为0.3V，发光二极管正向管压降会随不一样发光色彩而不一样。主要有三种色彩，详细压降参考值如下:赤色发光二极管的压降为2.0--2.2V，黄色发光二极管的压降为1.8-2.0V，绿色发光二极管的压降为3.0-3.2V，正常发光时的额定电流约为20mA。贴片二极管的电压与电流不是线性关系，所以在将不一样的贴片二极管并联的时候要接相适应的电阻。 贴片二极管特性 贴片二极管，电子元件旁边，一种具有两个电极的设备，只允许电流由单一方向流过。许多的使用是使用其整流的功用。而变容二极管(Varicap Diode)则用来当作电子式的可调电容器。