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85问答库 > 我想知道三极管的B、E电阻是什么作用，怎么确定大小

我想知道三极管的B、E电阻是什么作用，怎么确定大小

2025-03-17 02:09:51

推荐回答（2个）

回答1：

B、E应该是三极管的两个极，B为基极、E为发射极。
B、E间是一个二极管，不是一个电阻。
如果是NPN型三极管，则B为阳极、E为阴极；由于二极管的单向导电性，表现为E-B之间有一个很大的阻值，而B-E之间的阻值则较小。
如果是PNP型三极管，则B为阴极、E为阳极；表现为B-E之间有一个很大的阻值，而E-B之间的阻值则较小。

回答2：

一般用来限流，防止三极管被击穿

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