1. Partial display of Lei Mao MOV products
1. Partial display of Lei Mao MOV products
3. Overview of MOVs
MOV is an abbreviation for Metal Oxide Varistor. It is an electronic component that is commonly used to protect electronic devices in a circuit from damage caused by overvoltage. When the voltage in the circuit exceeds the rated value of MOV, it will automatically turn into a very low resistance path, allowing the voltage to be shunted to ground or other grounding points.
In general, MOVs are typically rated over a temperature range of -40°C to +85°C. However, for some special application requirements, MOVs need to be able to work normally in high-temperature environments, such as automotive, aviation, energy, and industrial production, and it is necessary to choose MOVs with a higher temperature range (e.g., models from -40°C to +125°C), so high-temperature MOVs have higher temperature tolerance than ordinary MOVs to ensure their stability and reliability.
We can provide high temperature range MOV to meet these special applications.
1.General temperature mov
operating temperature:
40 ℃ 85°c )
storage temperature:
40 oc ~ 125 °c )
2.High temperature MOV
operating temperature:
40 ℃ 125 °c)
storage temperature:
40 ℃ 150 °c)
High-temperature MOV mainly has the following characteristics:
1.Able to withstand high-pressure shocks, such as:
1.1,07D series can withstand 40 times of combined wave series, 2kV high voltage impulse, the specific models are: 07D820KH, 07D101KH, 07D121KH, 07D151KH, 07D181KH, 07D201KH, 07D221KH, 07D241KH, 07D271KH, 07D301KH, 07D331KH, 07D361KH, 07D391KH, 07D431KH, 07d471kh,07d511kh,07d561kh,07d621kh,07d681kh,1.2,10D series over 4kV high voltage impulse; The specific models are: 10D180LH, 10D220KH, 10D270KH, 10D330KH, 10D390KH, 10D470KH, 10D560KH, 10D680KH, 10D820KH, 10D101KH, 10D121KH, 10D151KH, 10D181KH, 10D201KH, 10D221KH, 10D241KH, 10D271KH, 10d301kh,10d331kh,10d361kh,10d391kh,10d431kh,10d471kh,10d511kh,10d561kh,10d621kh,10d681kh,10d751kh,10d781kh,10d821kh,10d911kh,10d102kh,10d112kh
1.3,14D series over 6kV high voltage impulse; The specific models are: 14D220KH, 14D270KH, 14D330KH, 14D390KH, 14D470KH, 14D560KH, 14D680KH, 14D820KH, 14D101KH, 14D121KH, 14D151KH, 14D181KH, 14D201KH, 14D221KH, 14D241KH, 14D271KH, 14D301KH, 14d331kh,14d361kh,14d391kh,14d431kh,14d471kh,14d511kh,14d561kh,14d621kh,14d681kh,14d751kh
1.4, 20D series over 10kV high voltage impulse; The specific models are: 20D270KH, 20D330KH, 20D390KH, 20D470KH, 20D560KH, 20D680KH, 20D820KH, 20D101KH, 20D121KH, 20D151KH, 20D181KH, 20D201KH, 20D221KH, 20D241KH, 20D271KH, 20D301KH, 20D331KH, 20d361kh,20d391kh,20d471kh,20d511kh,20d561kh,20d621kh,20d681kh,20d751kh,20d781kh,20d821kh,20d911kh
2.It has low leakage current and high resistance value.
3.Ability to respond quickly to high-voltage overload events.
4.Ability to quickly return to normal working condition.
The MOV 05D-20D can provide a high temperature series to meet the needs of customers. The specifications are as follows;
Fourth, Lei Mao plan recommendation
1. AC 220V power surge protection scheme
Advantages of the solution: It is used to meet the surge protection of the 220V AC power interface, and different levels of protection devices are selected according to the environment where the power supply is located, and the IEC61000-4-5 4KV 8KV different levels of testing are met.
2. AC 380V power surge protection scheme
Advantages of the solution: It is used to meet the surge protection of the 380V AC power interface, and different levels of protection devices are selected according to the environment where the power supply is located, and the IEC61000-4-5 4KV 8KV different levels of testing are met.
Founded in 2011 with the brand LEIDITECH, Shanghai Leiditech is a national high-tech enterprise. The company's R&D team is formed by Dr. Liumei and TI original development manager, with a skilled R&D team and experienced experts in the electromagnetic compatibility industry, mainly providing anti-static TVS ESD and related EMC components (discharge tube TSS GDT, voltage regulator ZENER, varistor MOV, rectifier diode Rectifier, resettable fuse PPTC, MOSFET, inductor).
Leiditech focuses on EMC electromagnetic compatibility to serve customers, and has built its own free laboratory to test electrostatic ESD (30kV), group pulse EFT (4kV), surge (8 20, 10 700 10 1000), automotive load dumping (7637 5A 5B) and component performance testing. Leiditech keeps up with the pulse of technology update at home and abroad, and constantly innovates EMC protection solutions and related devices, with the goal of small packaging, high power, and reliable solutions and components for domestic substitution.
Introduction to MOV
Varistors, referred to as MOV, are divided into two categories: SMD and plug-in, SMD small MOV is often used for electrostatic protection, usually designed at the interface end closest to the edge of the board, especially at the main power supply sink or transmission end, the focus is to let the energy in at the beginning of the voltage can be regulated. The function of MOV is to prevent the large surge voltage caused by lightning strikes from following the line into the product, resulting in product damage; Prevent the unstable transient voltage at the power supply end from entering the product with the switch end, which will destroy the function of the product; Prevent static electricity from entering the product and destroying the product.
MOV selection tips
1.Confirm the maximum allowable voltage: (product working voltage power supply voltage), power supply ** system: AC or DC;
2.Pay attention to the stability of the supply voltage: 10%, 30% or 20%;
3.Maximum suppression voltage (transient surge voltage acceptable to the device);
4.Joule value energy = k*vc(v)*ipp(a)*time(s).
5. v1ma=1.5vp=2.2VAC, where VP is the peak value of the rated voltage of the circuit (1.).414*VAC), VAC is the effective value of rated AC voltage, and the voltage value selection of VDR varistor is very important, which is related to the protection effect and service life.
information of mov
metal oxide varistor is referred mov, usually closed to the edge of the pcba design on the
layout side, especially will be at the main power source supply into or transmit port, the important is regulated the energy firstly when entering. mov role is prevention of surge from lightning cable into
the products lead to damage; prevention unstable power voltage following the on/off side access to the circuit, make the product function damage;
prevention damage static electricity into the product.
the selection tips of mov
1. recognize the maximum allowable voltage: (product working voltage /supply voltage ),power supply: ac or dc;
2. pay attention to the stability of the supply voltage: ±10%,±30% or±20%;
3. maximum voltage (transient surge voltage of the device can accept);
4. confirm energy=k*vc (v) *ipp (a) *time (s)
5. v1ma=1.5vp=2.2vac, the vp is the peak of circuit rated voltage (1.414*vac), vac is a valid value of the rated ac voltage, selection the vdr is essential, it is related to protection and longevity