Silicon controlled rectifiers ( scr ) have become quite popular with the advances in solid state devices 在固态元件领域可控硅整流器应用的非常广泛。
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The lst sigle stage time delay unit is a solid state device which delays the operation of an electrical circuit for a preset period . it has been designed for use with contactors on stepped control systems for electric motors such as are used on electric vehicles Lst延迟开关可以很简单又容易的控制电动车电路系统之预定延迟时间；并可配合连接电磁接触器来逐步控制行走马达，可以帮助您省略控制电路板与加速器之损坏费用。
