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Why do signal SPDs commonly use gas discharge tubes instead of varistors as the core primary energy dissipation element? Mar 06 , 2026
The fundamental reason for choosing gas discharge tubes (GDTs) as the primary surge protection component in signal lines is the need to prioritize the integrity of signal transmission while simultaneously providing effective surge protection. This choice is based on the superior characteristics of GDTs in terms of parasitic capacitance, balance maintenance, and tolerance to high currents, which ar...
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Now SPD monitoring has gone far beyond simple "on/off" indications. What intelligent directions is it developing towards? Mar 12 , 2026
Traditional SPD monitoring only provides a dry contact signal based on a mechanical disconnector, which is a typical "post-failure alarm"—it informs the user that the SPD has completely failed and needs to be replaced. Modern intelligent monitoring modules, however, utilize built-in microprocessors and sensors to transform the SPD from a passive protection component into an intelligent node capabl...
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