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有人知道三极管772一个多少钱吗？怎样选用和替换三极管呢？_装修预算_设计456问答
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有人知道三极管772一个多少钱吗？怎样选用和替换三极管呢？
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有人知道三极管772一个多少钱吗？怎样选用和替换三极管呢？
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提问时间： 07-24 10:06
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2个答案
三极管772一个价格是11元，三极管大都是塑料封装或金属封装，常见三极管的外观，有一个箭头的电极是发射极，箭头朝外的是NPN型三极管，而箭头朝内的是PNP型。实际上箭头所指的方向是电流的方向。
三极管772是一种电流控制电流的半导体器件·其作用是把微弱信号放大成幅度值较大的电信号，也用作无触点开关。晶体三极管，是半导体基本元器件之一，具有电流放大作用，是电子电路的核心元件。价格20--50元一个。
