Firstly, connect the multimeter to the test diode terminal, use the red probe of the multimeter to touch one of the pins of the transistor, and use the other probe of the multimeter to test the remaining pins.
There are two types of transistor based on their materials: germanium transistor and silicon transistor.
The transistor and field-effect transistor in digital electronic products are generally black, with most having three pins and a few having four pins (two pins in the transistor are connected, usually the emitter E or source S).
Fast Recovery Diode (FRD) is a semiconductor diode with good switching characteristics and short reverse recovery time. It is mainly used in electronic circuits such as switching power supplies, PWM pulse width modulators, and frequency converters, as a high-frequency rectifier diode, freewheeling diode, or damping diode.
CRD constant current diode, CRD constant current diode application, CRD product model, constant current diode, YFW Youfeng Microelectronics launches a full range of SOD-123FL, SMA, SMB packaged CRD constant current diodes YFW Youfeng Micro Constant Current Diode CRD015A (B/D) - CRD080A (B/D) SMA/SMB/SOD-123FL Product Selection
The biggest advantages of Schottky diodes are low impedance, small forward voltage drop, and fast recovery speed, so they are commonly used in high-frequency high current rectification and voltage drop protection circuits.
