There are various classification methods for controllable silicon

There are various classification methods for controllable silicon

（1） Classified by turn off, conduction, and control methods: thyristor can be divided into ordinary thyristors, bidirectional thyristors, reverse thyristors, gate turn off thyristors (GTO), BTG thyristors, temperature controlled thyristor, and light controlled thyristor according to their turn off, conduction, and control methods.

（2） Classification by pin and polarity: thyristor can be divided into bipolar thyristors, bipolar thyristors, and quadrupole thyristors based on their pin and polarity.

（3） Classification by packaging form: Thyristors can be divided into three types based on their packaging form: metal encapsulated thyristors, plastic encapsulated thyristors, and ceramic encapsulated thyristor. Among them, metal encapsulated controllable silicon can be divided into various types such as bolt shaped, flat shaped, and round shell shaped; Plastic encapsulated controllable silicon can be divided into two types: (with heat sink type) and (without heat sink type).

（4） Classification by current capacity: thyristor can be divided into three types based on current capacity: high-power thyristors, medium power thyristors, and low-power thyristors. Usually, high-power thyristors are mostly packaged in metal shells, while medium and small power thyristors are mostly packaged in plastic or ceramic packaging.

（5） Classification by turn off speed: thyristor can be divided into ordinary thyristors and high-frequency (fast) thyristors based on their turn off speed.