What is the difference between 5D and 7d varistors?

The same pressure-sensitive voltage and different surfaces have different current carrying capacity.

For example, the flow rates of 5d471k and 7d471k are different for these two types of resistors. Under the influence of 8 / 20 wave, the current standard 5d471k is 400a1 times or 200a2 times, and the positive and negative change rate does not exceed 10%. The flow standard of 7d471k is 1200a1 times or 600a2 times, and the positive and negative change rate shall not exceed 10%. If 8 / 20 1200a1 impacts 7d471k times, it is completely within the bearing range, but if the impact is 5d471k, it is much larger than the bearing standard. In addition, 7d is greater than 5D, which requires more raw materials, silver surface and epoxy powder for packaging., So the price will be very high.

Due to its lightning protection and strong compression resistance, varistors have been used in different ranges and have become one of the popular capacitors. When purchasing varistors, the usual manufacturer shall be selected. Provide high-quality chip varistors, plug-in varistors, thermistors, semiconductor discharge tubes, TV lamps, self-contained fuses and other products.