Aug. 16, 2021
As we all know, the service life of varistors is very long. Recently, in the discussion community, many users stated that the varistors they used burn out easily. Let’s try to find out the related reasons in this article.
Varistor is a voltage-limiting protection device. Due to the non-linear characteristics of the varistor, when an overvoltage occurs between the two poles of the varistor, the varistor can clamp the voltage to a relatively fixed voltage value, thereby realizing the protection of the subsequent circuit.
Reasons why the varistor is easy to burn out:
1) The surrounding working temperature is too high or too low:
A common problem is that the ambient temperature of the varistor is too high or too low, which will eventually cause the varistor to be damaged.
2) Times of overvoltage protection:
A varistor of good quality has relatively more times of overvoltage protection, while a varistor of poor quality has a few times of protection.
3) The chip sintering time is too short, the silver-plated surface is small, and the quality is too poor:
The core of the quality of the varistor lies in the quality of its internal chips. Under normal circumstances, the chips need to be sintered for 28 hours, but some low-quality chips are only sintered for 12 hours in order to save power and cost. Using small chips to replace large chips is also a common trick for low-quality varistors.
Due to the high price of silver, especially in recent months, the price of silver has risen higher and higher, the silver-plated surface of inferior varistors has become smaller and smaller, and the silver content is insufficient. Some manufacturers have begun to replace silver with copper. If such a low-quality pressure-sensitive chip is used, the varistor is indeed easily damaged.
In fact, it is very important to choose a regular varistor manufacturer. Regular varistor manufacturers can reduce unnecessary troubles, and guarantee pre-sales and after-sales services. If you don't know what capacitor manufacturer to choose, you can try varistors from Dongguan Zhixu Electronics Co.,Ltd (also JYH HSU(JEC)).
JEC has complete varistor models with guaranteed quality. Zhixu Electronics safety capacitor manufacturer has passed ISO9001:2015 quality management system certification; our safety capacitors (X capacitors and Y capacitors), varistors have passed national certifications of main industrial powers across the world; our ceramic capacitors and film capacitors are in line with environmental protection indicators. Welcome to contact us for help or samples.
How Does A Thermistor Function in Printer
Aug. 16, 2021
Advantages And Application Scenarios Of Super Capacitors
Aug. 16, 2021
+86 181 2299 5593
+86 18122995593
+86 769 8831 3605
Beside Luchong Bridge, Hou Road, Caibai Village, Daojiao Town, Dongguan, Guangdong, China
Navigation
