.The EL130-2M(Slot Optical Switch) is a gallium arsenide infrared emitting diode which is coupled with a silicon photo transistor in a plastic housing. .EL130-2M(槽式光电开关 ) 由红外发射二极管和 NPN 光电晶体管集成于塑料外壳中的光电耦合体 .The packaging system is designed to optimize the m...