本应用指南适用于电压高达1000 Vrms或1200 Vdc的系统中使用的晶闸管浪涌保护组件（SPC）。这些组件旨在通过限制电压和切换到低阻抗状态来限制过压和转移浪涌电流。虽然通信电路是晶闸管SPC的主要应用，但本指南也将为其他保护应用提供有用的信息。本指南旨在补充和配合IEEE晶闸管二极管浪涌保护装置标准测试规范（IEEE C62.37）使用。

This application guide applies to Thyristor Surge Protective Components (SPCs)used in systems with voltages up to 1000 Vrms or 1200 Vdc. These components are designed to limit overvoltages and divert surge currents by limiting the voltage and switching to a low impedance state. Although telecommunication circuits are the main application of Thyristor SPCs, this guide will also provide useful information for other protection applications. This guide is intended to complement and be used in conjunction with the IEEE Standard Test Specification for Thyristor Diode Surge Protective Devices (IEEE C62.37).