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三极管各极有什么区别，怎么辨认！

从本质上分辨，可以通过分辨发射区，基区，集电区，分辨发射极e，基极b，和集电极c。因为这三个电极都是三极管中各区导线牵出去的。

发射区和集电区均为N型半导体，不同的是，发射区比集电区掺入的杂质多，在几何尺寸上，集电区的面积要远比发射区的大。而基区在发射区和集电区之间。

简化电路中一般用“Y型来表示，一般都会有标识，其中b就是基极，e就是发射极，c是集电极。

如果没有标识，同样是“Y交叉处为基极，然后“Y”有箭头出来的是发射极，另一个自然就是集电极了。

分辨三极管各极的方法大概就是这样了

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