Core parameters of surge protection divice

Maximum Continuous Operating voltage (Uc) :The maximum effective AC voltage or DC voltage that can be continuously applied to the SPD-protected mode.
Voltage protection Level (Up) : The maximum voltage expected between the SPD ends due to the application of a shock voltage of a specified steepness and a shock current of a specified amplitude and waveform.
Impulse discharge current (Iimp) for Class I tests: A peak discharge current flowing through SPD with a specified amount of transferred charge Q and a specified specific energy W/R at a specified time, conforming to the 10/350 waveform ①.
Nominal discharge current (In) for Class II tests: Peak current with 8/20 waveform ② flowing through SPD.

Maximum discharge current (Imax) : The peak of the current flowing through SPD with an 8/20 waveform and manufacturer declared amplitude. (Imax is greater than or equal to In).

The core parameters of the surge protector are very important to the selection. In the selection process, it is necessary to consider factors such as protecting equipment safety, complying with national standards, optimizing configuration performance, adapting to different scenarios, and selecting core parameters. By selecting a suitable surge protector and configuring its performance parameters reasonably, a safe and reliable power environment can be provided for users to ensure that the equipment can work stably and reliably in various application scenarios.

Note:

①10/350 waveform diagram

②8/20 waveform diagram