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MYL1 disc type lightning protection varistor
The varistor is a voltage-limiting protection device. Utilizing the nonlinear characteristics of the varistor, when overvoltage occurs between the two poles of the varistor, the varistor can clamp the voltage to a relatively fixed voltage value, thereby protecting the subsequent circuit. The main parameters of the varistor are: varistor voltage, current capacity, junction capacitance, response time, etc.
- Commodity name： MYL1 disc type lightning protection varistor
- 产品描述
- 产品规格及参数
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Introduction to MYL1 disc type lightning protection varistor:
The varistor is a voltage-limiting protection device. Utilizing the nonlinear characteristics of the varistor, when overvoltage occurs between the two poles of the varistor, the varistor can clamp the voltage to a relatively fixed voltage value, thereby protecting the subsequent circuit. The main parameters of the varistor are: varistor voltage, current capacity, junction capacitance, response time, etc.
The response time of the varistor is ns level, which is faster than the air discharge tube and slightly slower than the TVS tube. Generally, its response speed can meet the requirements for over-voltage protection of electronic circuits. The junction capacitance of a varistor is generally in the order of hundreds to thousands of Pf. In many cases, it is not suitable to be directly used in the protection of high-frequency signal lines. When used in the protection of AC circuits, its large junction capacitance will increase leakage. Current needs to be fully considered when designing protective circuits. The flow capacity of the varistor is larger, but smaller than that of the gas discharge tube.
The biggest feature of the varistor is that when the voltage applied to it is lower than its threshold "UN", the current flowing through it is extremely small, equivalent to a closed valve. When the voltage exceeds UN, its The resistance becomes smaller, which causes the current flowing through it to surge without much change in the impact on other circuits, thereby reducing the impact of overvoltage on subsequent sensitive circuits. Using this function, abnormal overvoltage that often occurs in the circuit can be suppressed and the circuit can be protected from overvoltage damage.
Product type description:
MYL1 type varistor has the characteristics of large current capacity, wide voltage range, short response time, good surge suppression, and easy installation and replacement. Therefore, it is widely used in railway automatic signals, traffic control centers, communication relay stations, low-voltage power distribution, semiconductor devices and various electrical equipment operating over-voltage protection and atmospheric over-voltage protection.
1. Characteristics
●Wide voltage range (47V～1200V)
● Large nonlinear coefficient
● Large flow capacity
● Fast response time (≤20ns)
2. Main uses
● Semiconductor device protection
● Surge overvoltage protection for household appliances
● Surge overvoltage protection for communication, measurement and control instruments
● Solenoid valve and relay operation overvoltage protection
Key words:
MYL1 disc type lightning protection varistor
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