What are the differences between fast recovery diodes and ordinary diodes

What are the differences between fast recovery diodes and ordinary diodes

fast recovery diodes: The forward voltage drop is higher than that of ordinary diodes (0.5-2V), and the reverse voltage withstand is mostly below 1200V.

Ordinary diode: It has a forward voltage reduction (0.4-1.0V), a short reverse recovery time (2-10ns nanoseconds), and a large reverse leakage current, low withstand voltage, generally below 150V. It is mostly used in low voltage situations.

fast recovery diodes:

fast recovery diodes (FRD for short) is a semiconductor diode with good switching characteristics and short reverse recovery time. It is mainly used in switching power supply, PWM pulse width modulator, frequency converter and other electronic circuits as high-frequency rectifier diode, Flyback diode or damping diode. The internal structure of a fast recovery diodes is different from that of a regular PN junction diode. It belongs to the PIN junction type diode, which adds a base region I between the P-type silicon material and the N-type silicon material, forming a PIN silicon wafer. Due to the thin base region and low reverse recovery charge, the fast recovery diodes has a shorter reverse recovery time, lower forward voltage drop, and higher reverse breakdown voltage (withstand voltage).

A diode is a device with two electrodes in electronic components that only allows current to flow in a single direction, and many applications use its rectification function. The Varicap Diode is used as an electronic adjustable capacitor. The current directionality that most diodes possess is commonly referred to as the "rectifying" function. The most common function of a diode is to only allow current to pass in a single direction (called forward bias), and to block it in reverse (called reverse bias).