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小型继电器封装该怎么去设计

浏览：50次 | 提问时间： 08-03 08:15
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3个答案
海葵苍年 08-03 08:16

小型继电器封装：1.先了解必要的条件     　①控制电路的电源电压，能提供的最大电流；     　　②被控制电路中的电压和电流；     　　③被控电路需要几组、什么形式的触点。选用继电器时，一般控制电路的电源电压可作为选用的依据。控制电路应能给继电器提供足够的工作电流，否则继电器吸合是不稳定的。     　　2.查阅有关*确定使用条件后，可查找相关*，找出需要的继电器的型号和规格号。若手头已有继电器，可依据*核对是否可以利用。最后考虑尺寸是否合适。

七分霸气 08-03 08:24

如果是要做板的话，就必须按实物的大小形状尺寸来自己做封装了，没有什么继电器的封装，而且实际的继电器型号很多，大小差异很大的，必须按实物做。如果只是画PCB图或者完成作业就无所谓了，找一个5个脚的元件代替就行了，反正也不真的做电路板，更不是真的焊接板子，都无所谓了。

别忘却 08-03 08:32

通过新建功能新建。   打开protel   99se后，点文件（File）/新建（NEW）在弹出的窗口选择PCB   Library   Document新建好后就可以开始加画元件了，画好后记得保存。   一般情况下，焊盘尺寸是管脚实际尺寸的1倍，比如管脚0.5，焊盘尺寸就要设置为1.0。你提的这个问题我估计你是想把“焊盘”设置为扁的而不是圆的，”孔”也要设置为圆的。

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