Voltage switching type SPD generally composed of discharging gap, gas discharging tube, thyratron (silicone controllable rectifier) and three-ending bidirectional silicone switching element.

• 电压开关型SPD常用的元件有放电间隙、气体放电管、闸流管（硅可控整流器）和三端双向可控硅开关元件。这类SPD有时也称作“短路型SPD”。