The word varistor is derived from variable resistor. A varistor is an electronic component that protects expensive devices from harmful power surges, much like a shock absorber. Metal oxide varistors definition of varistor terms rated rms voltage, rated dc voltage the maximum designated values of power system voltage that may be applied continuously. Varistor technologies clients information, news, and their profile.
Current fuse wirewound fusing resistor thermofuse resistor. The small package of resistance, the resistor is used in so many circuits, in so many forms, that it is almost an omnipresent electric. A varistor is an electronic component with an electrical resistance that varies with the applied voltage. Varistor symbol and applications metal oxide varistor. Varistors are nonlinear twoelectrode semiconductor voltagedependant resistors. Varistor testing introduction this note details the common tests of varistor parameters and describes suitable test methods using simpli. Nvd metal oxide varistor disc type koa speer electronics, inc. These ul recognized varistors require very little mounting space, and are offered in various standard lead form options. Also known as a voltagedependent resistor vdr, it has a nonlinear, nonohmic. The series of a varistor varies depending on the voltage it can hold, the devices it is used to control, and the type of power used in its build. Varistors provide over voltage protection to electrical and electronic circuits in contrast to circuit breakers or fuse which provide protection to circuits from over current. The resistance of a varistor is variable and depends on the voltage applied.
They have the capability to absorb high transient energies and can suppress both. You probably have a prototype board on your desk that contains the simple circuit shown below. What is varistor how its worked and their application. Pdf vla20ax10 varistor 275l20 250l40 varistor 150l20 varistor varistor 275l20 datasheet pdf download 150l10 varistor l20 varistor 510l40 varistor l10 150l20 mov varistor 275l40. Since the varistor is not polarity sensitive, it is suitable for protection in both ac and dc voltages.
Tvs varistors, movs specifications the varistor is a nonlinear bidirectional voltage dependent protection device with a relatively high transient current and energy rating. Options include ultra small surface mount multilayer suppressor mlv devices for small. Product datasheets, user manuals, guides, trials, trial versions, command sheets, quick start guides. Construction round varistor element, leaded coating. Varistor provide protection by voltage clamping method which is similar to that in a zener diode. Varistor datasheet, varistor pdf, varistor data sheet, varistor manual, varistor pdf, varistor, datenblatt, electronics varistor, alldatasheet, free, datasheet. Mouser is an authorized distributor for many varistor manufacturers including. A multilayer srtio 3 varistor, comprising both the functions of a capacitor and a varistor, can be. It is used extensively in high power transmission circuits as well as low power mobile chargers. Specifications, descriptions and illustrative material in this literature are. Features zinc oxide varistor are nonlinear resistors utilize a semiconductor electronic ceramic element mainly composed of zinc oxide and its resistors change as a function of the. Varistor is equivalent with zener diode of two series connection. Littelfuse varistors are available in a variety of forms to serve a wide range of applications. P250l40 varistor p150l20 varistor varistor p275l40 p275l40 150l10 varistor varistor p250l20 p300l20 pl10 pl20.
The new nt series of thermofuse varistors consists of a disk varistor connected in series with an integrated ther. Varistors are in stock and ship sameday at mouser electronics from industry leading manufacturers. Vishay varistors provide a reliable and efficient way to protect against highvoltage transients and surges. Datasheet search engine for electronic components and semiconductors. Here the varistor is formed 90% with zinc oxide and the rest is filler material that forms the junction. Metal oxide varistors varistors shall be no outstanding damage and the variation varistor voltage should varistors shall be subjected to 125 2c, for 1,000 hours in a thermostatic bath without.
Tamb varistors b72214wr thermofuse varistors, nt series nt14 series. Choose between 12 varistor icons in both vector svg and png format. Glass encapsulated smd varistor mlv avx corporation. Glass encapsulated smd varistor mlv vj12, 20, 14, 15, 32 automotive mlv range ma, pa and qa series automotive series vj12, 20, 14, 15, 32 ma and pa series features. Dat a s h e e t hp laserjet pro mfp m series s im p le p rod u c t iv it y. The figure below shows the structure of metal oxide varistor.
Varistor datasheet, varistor pdf, varistor data sheet, datasheet, data sheet, pdf. The littelfuse 20mm smd series is a surface mount metal oxide varistor device, for use in applications requiring hienergy. Varistors provide protection by voltage clamping method which is similar to that in a zener diode. Related icons include resistor icons, electronic icons, voltage icons, electric. Varistor voltage v1ma 1 621 62x10 v620v 2 102 10x10 vv tolerance of, compliant tw 2014. What is the meaning of the capacitance parameter in the datasheet of a varistor. Ppd var pd 20181008 please read cautions and warnings and page 7 of 18. I have noticed that 7mm 430 varistor voltage07d431k and 14mm 430 varistor voltage. Help identifying a varistor electrical engineering stack. Varistor material data sheet product family name disk varistor b72220s date. Varistor datasheet, varistor pdf, varistor data sheet, datasheet, data sheet, pdf, page 2. In diesem hochstrombereich jenseits eines im datenblatt angegebenen stromsto. The current in a varistor is proportional to applied voltage raised to a power.
Even though the name varistor is derived from the terms variable resistor, the. Varistor technologies clients our prestigious client list. Sos electronic is an authorized distributor of semikron. Tmov20rp320e vor thermischer uberlastung geschutzte varistoren. Voltage protection devices are used for protecting electronic circuits particularly ic components from electrostatic discharges esd and. Siov metal oxide varistors data book 2008 schmidmultitech sro. For example if there is a power surge, the varistor, normally having. Keko varicon products are sold by description only product technical specification. Ibs electronics was established in 1980 in southern california.
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