Varistor type meaning

Different capacitors have different material names. Some newbies don't know what model they are when they see a series of numbers. The content of this article teaches you how to look at the model meaning of varistor.

What are the meanings of each letter and number similar to the following material models? Varistor 34S621K620V20KA. 34S621K620V20KA: Resistance: 621K, high withstand voltage: 620 volts; instantaneous breakdown current: 20KA. The 25D391K390V3KV is also the same interpretation. For example, 25 in the logo indicates that the chip diameter is 25 mm; "1" after 391 indicates that the number of zeros after the number is "1", that is, a "0".

391K means 390V; K means varistor voltage tolerance, "K" means plus or minus 10%, and everyone needs to pay attention to the model number: the way different manufacturers express different methods, such as: 20D391 K and 20K391. There is no difference in attributes, just a different way.