标准摘要
[中文适用范围]： IEC TR 61643-333:2026 阐述了金属氧化物压敏电阻（MOV）的U-I/R-I特性方程及寿命评估方法，适用于额定电压不超过1000 V交流或1500 V直流的电力线路、通信电路或信号电路。该标准旨在保护设备、人员，或两者免受高瞬态电压的损害。本文档专门针对氧化锌型金属氧化物压敏电阻。 [外文原描述]： IEC TR 61643-333:2026 presents the U-I/R-I characteristic equations and the life evaluation method for MOVs, which are used for applications up to 1 000 V AC or 1 500 V DC in power line, or telecommunication, or signalling circuits. They are designed to protect apparatus or personnel, or both, from high transient voltages. This document specifically addresses the zinc-oxide type of MOVs.
英文名称Components for low-voltage surge protection - Part 333: characteristic equations and life evaluation for metal oxide varistors (MOV)