Composite tubes can be divided into two categories: one is general type composite tubes, with no internal protective circuit, such as low and medium power composite tubes under 2W, the other is with internal jiashan.37ix.com.cnyinyue.37ix.com.cnpailou.37ix.com.cngongcheng.37ix.com.cnyuanlin.37ix.com.cn

shumiao.37ix.com.cnprotective circuit, such as high power composite tubes. The main characteristic parameters of silicon NPN high power composite tube are listed in the table below.