SPDT是Single Pole Double Throw的英文缩写，即单刀双掷的意思，是开关或电器接线的一种方式。 SPDT是微动开关接触形式中的一种，即单极双投，也称为转换式；其功能是在常开与常闭两种中切换。特征：SPDT端子脚通常多于2支可实现两种不同功能的切换文章出处：http://www.lygjiajin.com
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