Fast recovery diode is a kind of semiconductor diode with good switching characteristics and short reverse recovery time, which is usually used for rectification and freewheeling products with higher frequency. So fast restore the role of the diode what? Let's take a look.

Relative diodes, plus the voltage at both ends of the change from the forward to the reverse, the response time is generally very short, while the reverse from the reverse when the time is relatively longer, which is the reverse recovery time, When the diode is used for high-frequency rectification and so on, the reverse recovery time is required to be very short. In this case, a fast recovery diode (FRD), a higher super fast recovery diode (SRD), and a switching diode are required, tube.

Fast recovery diode internal structure and ordinary PN junction diode is different, it is a PIN junction diode, that is, in the P-type silicon material and N-type silicon material added between the base I, constitute PIN silicon. Due to the base area is very thin, reverse recovery charge is small, so the fast recovery diode reverse recovery time is shorter, the forward voltage drop is lower, the reverse breakdown voltage (breakdown voltage) higher.

Typically, 5 to 20A fast recovery diodes are housed in TO-220FP plastic packages. High-power fast recovery diodes above 20A are available in TO-3P plastic packages with metal heat sinks on top. Fast recovery diodes below 5A use DO-41, DO -15 or DO-27 specifications plastic package. Examples of the products are FR101 under DO-41 series, FR151 under DO-15 and FR301 under DO-27.

The above is the role of fast recovery diodes, Jinan Lu Jing semiconductor fast recovery diodes made a good performance test, the application of major areas, after-sales also have protection.