How About The Composite Surge Protector - Small Size, 0 Follow-up Current, 0 Leakage Current

How about the composite surge protector? Is it good? For this question, let's take a look today, use data to speak, and find the answer in your heart! We know that there are many types of surge protectors on the market now, which can be divided into three types: voltage switching SPD, voltage limiting SPD and composite SPD surge protector. Then the question is, what is the difference between these three types of surge protection device? Which of these three surge protectors is better? Will it be the composite surge protector we expected?

First, let's take a look at the difference between these three types!

1. The voltage switching surge protector has high impedance when there is no surge, and can suddenly change to a low-impedance SPD when responding to the surge voltage. (Common components include discharge gaps, gas discharge tubes, thyristors (silicon controlled rectifiers) and triac switching elements.) The disadvantage is that there is a continuous current, and its flow rate is large, that is, the lightning energy discharge capacity is large, and it is usually used for primary protection.

2. Voltage-limited surge protective device are SPDs that also have high impedance when there is no surge, but whose impedance will continue to decrease as the surge current and voltage rise. (Commonly used components are varistors and suppression diodes. These are called "box-type" components) They have good performance and low cost and are widely used. The disadvantage is that there is leakage current, which can easily deteriorate the surge protector, and they are usually used as secondary protection.

3. Composite surge protectors are SPDs composed of voltage switching components and voltage limiting components. (Its characteristics can be voltage switching, voltage limiting, or both depending on the characteristics of the applied voltage) It combines the first two components. For the switch type and voltage limiting type, it has no continuous current and no leakage current, which can give full play to the advantages of the switch type and voltage limiting type, and can be perfectly used for installations at all levels with a long service life.