Explosion Proof 20mm Surge Suppressor Varistor High Energy MOV 12KA

Product Description

Explosion-Proof Metal Oxide Varistor MYGM For Car Air Conditioner Refrigerator

Description of The Explosion-Proof Metal Oxide Varistor MYGM

The MYGM type varistor is a component made of MYG varistor as the main component, encapsulated in a V0-grade non-combustible plastic shell, and at the same time using stone sand as a filler. Its resistance value changes with the change of the applied voltage. Linear change, explosion-proof, flame-retardant, large flow, etc.

The advantage of explosion-proof varistor is that it can avoid the instantaneous high temperature that may cause serious consequences to electrical equipment due to the short-circuit failure of the product. Compared with conventional varistors, it has the characteristics of explosion-proof and flame-retardant. Varistor with low cost and compatible with existing conventional circuit board design.

Features Description of The Explosion-Proof Metal Oxide Varistor MYGM

1. Wide varistor voltage range: 200v…820v (±10%)

2. High surge current rating up to 12KA

3. No derating up to 85℃ ambient temperature

4. Arc suppression

5. Heat isolation

6. Safty

7. Explosion proof

8. Great withstanding surge current

9. UL, VDE and CQC approved

10. RoHS compliant

11. High non- linearity coefficient

12. Fast response time≤50ns

Dimension of The Explosion-Proof Metal Oxide Varistor MYGM

Applications of The Explosion-Proof Metal Oxide Varistor MYGM

1. Transistor, diode, IC, thyristor or triac semiconductor protection

2. Surge protection in consumer electronic equipment

3. Surge protection in communication, measuring, or controller electronics

4. Surge protection in electronic home appliance, gas or petroleum appliance

5. Relay or electromagnetic valve surge absorption

6. Protection of semiconductors

7. Surge protection of household electrical equipment

8. Surge protection of communication, measuring or controlling instrument

Specification of The Explosion-Proof Metal Oxide Varistor MYGM

Advantages of The Explosion-Proof Metal Oxide Varistor MYGM

1. The varistor is sealed in the shell and isolated from the outside air, which effectively prevents the burning and explosion of the lightning arrester when it breaks down;

2. Fill the inside of the shell with quartz sand and epoxy resin to prevent the explosion from the moment of breakdown, and also have a good flame retardant effect;

3. High-grade fireproof material shell and multiple fireproof and explosion-proof structures can fundamentally prevent the damage to electrical appliances when the lightning arrester burns or bursts.

Working principle of The Explosion-Proof Metal Oxide Varistor MYGM

Varistor is a voltage-limiting protection device. Using the non-linear characteristics of the varistor, when an overvoltage appears 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. The main parameters of varistor are: varistor voltage, current capacity, junction capacitance, response time, etc.
The response time of the varistor is ns, which is faster than the air discharge tube and slightly slower than the TVS tube. Under normal circumstances, the response speed of the overvoltage protection for electronic circuits can meet the requirements. The junction capacitance of a varistor is generally in the range of several hundred to several thousand Pf. In many cases, it is not suitable to be directly used in the protection of high-frequency signal lines. When it is used in the protection of AC circuits, because its junction capacitance is large, it will increase leakage. Current needs to be fully considered when designing the protection circuit. The current capacity of the varistor is larger, but smaller than that of the gas discharge tube.
The biggest characteristic of a varistor is that when the voltage applied to it is lower than its threshold "UN", the current flowing through it is extremely small, which is equivalent to a closed valve. When the voltage exceeds UN, its The resistance value becomes smaller, so that the current flowing through it increases sharply and the impact on other circuits does not change much, thereby reducing the impact of overvoltage on subsequent sensitive circuits. Using this function, the abnormal overvoltage that often occurs in the circuit can be suppressed, and the circuit can be protected from the damage of the overvoltage.