With the continuous development of technology, electronic components are becoming increasingly widespread in daily life and industrial production. Among them, varistors, as important electronic components, are widely used in various circuits.
The resistance value of a varistor changes with the variation of applied voltage. When the voltage exceeds the threshold of the varistor, its resistance value rapidly decreases, thereby absorbing transient overvoltages and protecting the circuit.
However, there are numerous brands of varistors on the market, with varying qualities. Some unscrupulous merchants may produce counterfeit and inferior varistors for profit and sell them.
Purchasing counterfeit and inferior varistors not only brings economic losses to consumers but, more importantly, these counterfeit and inferior varistors may cause circuit failures and accidents.
Therefore, when selecting varistors, it is necessary to be vigilant, carefully distinguish between genuine and fake, and ensure the purchase of qualified varistors.
How to avoid buying counterfeit and inferior varistors?
Choose Reputable Brands
When purchasing varistors, reputable brands should be chosen. Reputable brands have strict production standards at the manufacturing stage, providing higher quality assurance and comprehensive after-sales service, thereby reducing the risk of purchasing counterfeit and inferior varistors.
Pay Attention to Appearance Quality
Qualified varistors should have a neat and smooth appearance without defects such as bubbles, cracks, impurities, etc. In addition, pay attention to carefully examining the markings and parameters of the varistors to ensure they meet your requirements.
Test Performance Indicators
To ensure the reliability of the purchased varistors, performance testing can be conducted before purchase. Evaluate the performance of the varistors by measuring indicators such as voltage coefficient, leakage current, and withstand capability against shock.
Avoid Being Tempted by Cheap Prices
Some consumers often choose brands with low prices when purchasing varistors. However, inexpensive varistors may not necessarily be cost-effective and may also have quality issues or be counterfeit and inferior products.
This article was provided by JYH HSU (JEC) Electronics Ltd (or Dongguan Zhixu Electronic Co., Ltd.), an electronic components manufacturer who produces all kinds of capacitors and resistors. JEC factories hold ISO 9000 and ISO 14000 certifications.
Post time: Mar-11-2024