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What are the differences between Single-port SPD and two-port SPD?
Jan 22 , 2026
The distinction between single-port and two-port surge protective devices (SPDs) is essentially a professional classification based on their circuit topology and connection method within the circuit. A single-port SPD exhibits a parallel connection structure in its electrical configuration, with all its external terminals directly connected in parallel to the protected power or signal lines. The i...
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What is the "clamping voltage" of SPD? What is the core role in SPD, and how it related to the "voltage protection level"?
Feb 05 , 2026
The clamping voltage is a dynamic performance parameter, specifically referring to the peak voltage across the terminals of a surge protective device (SPD) when its core nonlinear element (such as a metal oxide varistor (MOV) or avalanche diode (TVS)) conducts and discharges a surge current of a specific waveform and amplitude. It is essentially the highest voltage established by the SPD during th...
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