For the model naming method of varistor, for example,14d471k. Where 14 is the diameter of the rheostat, d is a circle and s is a square. 47 1 indicates that the voltage-sensitive voltage is 470V, where 1 indicates the number of subsequent O's (that is, the power of 10). If it is like 14 102 K, the voltage is1000 v.k is the voltage level, and k means the voltage range is 470V+/- 10%. There are others, such as M is +/-20%, S is special, and J is plus or minus 5%.
The rheostat is connected in parallel with the voltage of 220 volts located in front of the fuse. It must have short-circuited the mains in an instant, and the instantaneous current became larger, which broke down the varistor. The rheostat exceeds the maximum limit voltage and burns out. Equivalent to opening the road. The fuse must be all right.
Shenzhen weideer electronics co., ltd
Professional varistor old brand
Contact: Mr. Guo
Need to contact, please call Baidu user name.