MYG3 10K 420 General Metal Oxide Varistors For Surge Protectors

     MYG3 10K 420 General Metal Oxide Varistor Power Source Arrester

 A Metal Oxide Varistor or MOV is the blue or orange-colored circular component that you can commonly spot on the AC Input side of any Power Supply Circuit. The Metal Oxide Varistor can be considered as another type of variable resistor that can vary its resistance based on the applied voltage across it. When a high current passes through a MOV, its resistance value decreases and acts as a short circuit. Hence MOVs are normally used in parallel with a fuse, to protect circuits from high voltage spikes. In this article, we will learn more about MOV Working and how to use it in your designs to protect your circuits from voltage spikes. We will also learn about the electrical properties of MOV and how to select a MOV according to your design requirements, so let get started.

Features

• Silicone Resin Coating
• Low Leakage Current
• Bidirectional and Symmetrical V/ Characteristics
• Operating Temperature Range  Low Temperature: -40℃   High Temperature: +85℃/+105℃
   

Application

      MOV a.k.a varistors is commonly used along with fuse in parallel to the circuit that is to be protected. The below image shows how to use MOV in the electronics circuit.

     When the voltage is within the rated limits the resistance of the MOV will be very high and hence all the current flows through the circuit and no current flows through the MOV. But when a voltage spike occurs in the main voltage, it appears directly across the MOV since it is placed in parallel to AC mains. This high voltage will decrease the resistance value of the MOV to a very low value making it appear like a short.

     This forces a large current to flow through the MOV which would blow the fuse and disconnect the circuit from the mains voltage. During voltage spikes the faulted high voltage will return to normal values very soon, in those cases, the duration of the current flow will not be high enough to blow the fuse and the circuit returns to normal operation when the voltage becomes normal. But, every time a spike is detected the MOV disconnects the circuit momentarily by shorting itself and damaging itself with high current each time. So if you find a MOV damaged in any power circuit it is possibly because the circuit went through many voltage spikes.

​Lead Style

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+=UL 1449 File E321175(S)—Surge Protective Device □= UL 1449 File E181155(N)—Across—The—Line Application △=C—UL for CSA C22.2 File E321175(S) Dimension in mm

COMPANY OVERVIEW

    Xian Xiwuer Electronic & Info. Co., Ltd. is located in Beiguan, Xi'an city cover in an area of 4000 ㎡, with employees of 2300, and about 580 technicians, amongthem, there are 135 engineers, 21 senior engineers. The company has total assets of 315 million RMB Yuan, fixed assets of 137 million RMB Yuan, which is a large enterprise mainly engaged in producing electronic components. The company has the largest production scale of Varistor,SPD( Surge Protective Device)and HV Ceramic Capacitor in China, with the following main products :

1. Varistors & SPD

4. Thermistor

      The main production line and inspection equipment & instrument are imported from Japan, America, Belgium and Switzerland etc. The annual production capacity of the two leading products has been reached to 5 million pcs and 150 million pcs respectively, with the market holding rate in China of about 10% and 30% respectively by continually technical innovation. Varistors and SPD produced by the company enjoyed great reputation in the international market, being exported to many countries and areas such as Japan,USA, Hong Kong etc., with the customers like India and GE in USA. are already sold to LG company in Korea with large quantity, and also to Spainand India etc.

      Not only the products quality and technical capacity, but also the completeness of the models are all in the leading place in China. The main products have got CCEE, UL, VDE & TUV approval. The quality system was set up according to the requirement of ISO9000 since 1992, and has passed ISO9002 approval by DNV International Organization in July 1994, then got ISO9001 certification by British organization in 2000, by then we are both the first one who are approved by ISO9000 certification in the North-west area of China and the same occupation. We passed all the successive periodical audit and smoothly get the new certificate registered in Holland in Aug.1997; the quality system is strengthened and completed constantly. And we also got ISO18000 certificate.

     We believe we are able to supply satisfied goods and service to customers home and abroad with the most reasonable price and the shortest delivery time, on basis of our excellent quality assurance capacity, technical development capacity and rich manufacturing experiences.

CERTIFICATE