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SMD patch varistor is a resistance device with nonlinear voltammetry characteristics. It has characteristics such as resistance. Mainly used for voltage input before the input voltage clamp within a certain range to absorb excess current. Its response time is ns and it is very fast.

Electronic products are widely used in everyday life, but they can cause problems if they are not used and protected properly, or if they are kept for too long. If there is a problem, electronic products cannot be used. The bottom line is that there are problems with the electronics that are assembled internally. Today, I will tell you how to tell if there is a problem with SMD patch varistor and how to fix it.

SPD varistor is one of the most widely used voltage limiting devices. The rheostat includes silicon carbide rheostat and zinc oxide rheostat. The commonly used zinc oxide varistor is a kind of overvoltage protection device. It is made of zinc oxide as raw material, a variety of trace metal oxides, mixed and sintered, and the outer surface is sealed with epoxy resin.

SPD varistor is a resistance device with nonlinear voltammetry characteristics. It is mainly used to embed voltage when the circuit is overvoltage, absorb excess current, and protect sensitive devices. The resistance material of rheostat is semiconductor, so it is a kind of semiconductor resistance. In Taiwan Province, China, SPD varistors are known as "surge absorbers" or "surge suppressors (absorbers)". According to different uses, varistor can be divided into protection varistor and circuit function varistor.

SPD varistor is one of the most widely used voltage limiting devices. The rheostat includes silicon carbide rheostat and zinc oxide rheostat. The commonly used zinc oxide varistor is a kind of overvoltage protection device. It is made of zinc oxide as raw material, a variety of trace metal oxides, mixed and sintered, and the outer surface is sealed with epoxy resin.

A rheostat is a voltage limiting protection device. By using the nonlinear characteristics of the varistor, the voltage can be clamped to a relatively fixed voltage value when overvoltage occurs at its two poles, thus realizing the protection of the subsequent circuit. Varistor is also very important for transient overvoltage protection in circuits. Although it has a large flow rate, it does not have a large energy capacity. In addition, because the impulse current to large pulse width is much smaller than the actual pulse current width of medium and large power semiconductor system, short circuit or burn out fault often occurs.