The rectifying diode uses the unidirectional conductivity of the PN junction to change the alternating current into pulsating direct current. The leakage current of rectifier diodes is large, and most of them are packaged with surface contact materials. The shape of the rectifier diode is shown in Fig. 3. In addition, the parameters of the rectifier diode include the maximum rectifier current, which refers to the maximum current allowed for the rectifier diode to work for a long time. It is the main parameter of rectifier diode and the main basis for selecting rectifier diode.
Select
Rectifier diodes are generally planar silicon diodes, which are used in various power supply rectifier circuits.
When selecting rectifier diodes, the maximum rectifier current, maximum reverse working current, cut-off frequency and reverse recovery time shall be considered.
The rectifying diodes used in the ordinary series stabilized power supply circuit do not have high requirements for the reverse recovery time of the cut-off frequency, so long as the rectifying diodes with the maximum rectifying current and the maximum reverse working current meet the requirements according to the requirements of the circuit. For example, 1n series, 2CZ series, RLR series, etc.
Rectifier diodes used in the rectifier circuit and pulse rectifier circuit of switching regulated power supply shall be rectifier diodes with high working frequency and short reverse recovery time (such as Ru series, EU series, V series, 1sr series, etc.) or fast recovery diodes. There is also a Schottky rectifier diode.
