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目前,国内外的压敏电阻器,从主体材料来看主要有氧化锌、碳化硅、氧化钛和钛酸锶等几个大类。其中生产量最多、品种规格最全的是氧化锌压敏电阻器。压敏电阻器的伏安特性类似于晶体稳压管的反向击穿特性,即当加在器件上的电压超过“击穿电压后,电流随电压的增大而急剧上升。但是,与稳压管相比,压敏电阻
At present, the varistor at home and abroad, mainly from the main material point of view there are several categories of zinc oxide, silicon carbide, titanium oxide and strontium titanate. Which the largest production, the most complete variety of specifications is zinc oxide varistor. The volt-ampere characteristics of a varistor are similar to the reverse breakdown characteristics of a crystal regulator in that the current increases sharply as the voltage increases when the voltage applied to the device exceeds the breakdown voltage. However, Pressure tube compared to varistor