Commonly used transistor packaging forms include metal packaging and plastic packaging. The arrangement of pins has certain rules.
The bottom view position is placed so that the three pins form the vertices of the isosceles triangle, from left to right, ebc; To the right is ebc.
There are many kinds of various types of transistors in China, and the arrangement of the pins is not the same. If you are not sure about the arrangement of the pins in use, you must measure to determine the correct position of each pin, or look up the transistor manual to clarify the transistor. Characteristics and corresponding technical parameters and information.