Varistors are available for a broad range of specifications and are classified by maximum voltage, clamp voltage, peak. The fast responsetime is used for protecting electronic circuits from voltage transients, surges, spikes, overvoltage events, and esd. Glass encapsulated smd varistor mlv vj12, 20, 14, 15, 32 automotive mlv range ma and pa series automotive series vj12, 20, 14, 15, 32 ma and pa series v i characteristics v i characteristics. For this reason, varistors are also called metaloxide varistors mov. When the voltage increase above the threshold of the varistor, the suppressor draws a rapidly increasing current. Calculate the surge current wave form from the surge voltage and surge impedance. F failsafe varistor q energetiq s leaded varistor t thermofuse u disk type, snf x disk type, snf aecq200 series.
The specified voltage shall be applied between both terminals of the specimen connected together and the electrode inserted between the metal balls. No breakdown leaded varistors b722 advancedmp, s10. Also known as a voltagedependent resistor vdr, it has a nonlinear, nonohmic currentvoltage characteristic that is similar to that of a diode. Zinc oxide varistor selection only reference varistor voltage varistor voltage should be more than the operating voltage in over protective circuit, the formula is shown as the following. Varistor provide protection by voltage clamping method which is similar to that in a zener diode. For leaded varistors b722 or b723 10 s 2 271 k 1 0 1 monolithic varistor nominal disc diameter design. Epcos, alldatasheet, datasheet, datasheet search site for electronic components and.
Antennaguard series low capacitance varistors are designed for reliable bidirectional circuit protection against transient overvoltages in rf circuits and other capacitance sensitive applications. Check to make sure the withstanding surge current of the varistor is sufficient. Quality assurance acceptance tests screen milstd750 method condition tx requirements high temperature life stabilization bake 1032 24 hours min at max rated storage temperature. Varistor voltage at 1 ma maximum allowable voltage clamping voltage at 820s maximum peak current at 820sa recommended applications type name approvals v acrms vdc v max.
The varistor is composed primarily of zinc oxide with small additions of bismuth, cobalt, manganese and other metal oxides. Siov, leaded varistors, standard series, s05, s07, s10, s14 and s20. Usually, zinc oxide is used in its manufacturing thus is also known as metal oxide varistor the figure below shows the structure of metal oxide varistor. Vdr metal oxide varistors standard additional resources ordering information the varistors are available in a number of packaging options. Item main material coating material marking appearance zinc oxide epoxy resin gnr, part number, ul, csaor cul and vde recognized component mark, date code. Communication bus varistor general description the can bus and flexray varistor is a zinc oxide zno based ceramic semiconductor device with nonlinear voltagecurrent characteristics bidirectional similar to backtoback zener diodes and an emc capacitor in parallel see equivalent circuit model. The structure of the body consists of a matrix of conductive zinc oxide grains separated by grain boundaries providing pn junction semiconductor characteristics. Varistors are in stock and ship sameday at mouser electronics from industry leading manufacturers. Varistor voltage maximum allowable voltage clamping, 10 2 t timime es s 10 es s 20 10 9 8 7 6 5 4 3 680 10d zv 60 r e 0d5 70 1 0d4 zv er rzv1 0 e 39 10d zv 30 er d3 10 v z er 270 0d v1 20 z er 0d2 1 zv 80 er. Varistor, 320v, typ s20 laborsortiment, varistoren, ccr62 laborsortiment, varistoren. Calculate the required varistor voltage at 10% to 25% above the system rms or dc voltage. Reproduction, publication and dissemination of this publication, enclosures hereto and the information contained therein without epcos prior express consent is prohibited. In contrast to a diode however, it has the same characteristic for both directions of traversing current. Mov smdsmt varistors are available at mouser electronics.
Tvs varistors, movs specifications the varistor is a nonlinear bidirectional voltage dependent protection device with a relatively high transient current and energy rating in the nanosecond to millisecond time frame. Varistor datasheet, varistor pdf, varistor data sheet, varistor manual, varistor pdf, varistor, datenblatt, electronics varistor, alldatasheet, free, datasheet. Energy typical capacitance part number acrms dc dc volts 1 time vc ip 2 ms 10 1,000 s at 1 khz volts volts min. Avx transguard automotive series multilayer varistors provide wide range of highly reliable, aecq200 qualified smt components for bidirectional overvoltage protection with the advantage of emirfi attenuation in the offstate for automotive applications. Sep 17, 2019 fnr10k471 datasheet 470v, zinc oxide varistor fenghua, fnr10k471 datasheet, fnr10k471 pdf, fnr10k471 pinout, fnr10k471 manual, fnr10k471 data. Generally, 90% of the grains are of zinc oxide, and 10% of grains are of other metals like bismuth, cobalt, manganese. Calculate the varistor energy rating needed based on energy in transient voltage. I have noticed that 7mm 430 varistor voltage07d431k and 14mm 430 varistor voltage 14d431k have the same max continuous voltage and the same maximum clamping voltage, but the larger varistor 14d431k has higher maximum surge current, higher rated power, and higher reference capacitance. Varistor datasheet, varistor pdf, varistor data sheet, datasheet, data sheet, pdf home all manufacturers by category part name, description or manufacturer contain. Users should verify actual device performance in their specific applications. Bending of the leads for different angle placement is not recommended. S14k385 varistor 385vrms 14mm radial epcos inc datasheet pdf.
A varistor is a varying resistor whose resistance depends on the applied voltage. Mov14dxxxk series metal oxide varistor rohs directive 200295ec jan. For example if there is a power surge, the varistor, normally having a very high resistance, responds to the voltage spike by absorbing its energy with a. Circuit protection from transient voltage by varistor. Murata varistors are available at mouser electronics. Leaded varistors, s10k300 datasheet, s10k300 circuit, s10k300 data sheet. They are also known by the name vdr voltage dependent resistor and have nonohmic characteristics. Smd varistors varistors passives wide offer of products at transfer multisort elektronik. Plastic package, 1 varistor 1 capacitor 1if skvc 20 a 460 615 180 320 560 615 745 750 220 390 680 750.
Metal oxide varistors overvoltage protection device raychem circuit protection products product. Therefore, they come under non linear type of resistors. Page 1 varistorssmd for highspeed differential signal line avf16 series a lowvoltage varistor applicable in high frequencies has been manufactured by using tdk circuit and material technology. B72220s0271k101 epcos datasheet and cad model download octopart. Nvd metal oxide varistor disc type koa speer electronics, inc. S14k385 varistor 385vrms 14mm radial epcos inc datasheet. A simple varistor circuit learning about electronics. The capacitance parameter in varistor data sheet electrical. The za series of transient voltage surge suppressors are radial leaded varistors movs designed for use in the protection of low and medium.
Vishay varistors provide a reliable and efficient way to protect against highvoltage transients and surges. S14k385 varistor 385vrms 14mm radial epcos inc datasheet pdf data sheet free from datasheet data sheet search for integrated circuits ic, semiconductors and other electronic components such as resistors, capacitors, transistors and diodes. 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 applied voltage. Varistor, 320v, typ s20 laborsortiment, varistoren, ccr62 laborsortiment, varistoren, ccr63 varistor, zertifiziert sind. The name has been coined by linguistic blend of words.
Allowable voltage varistor voltage withstanding surge current 8 20. Peak voltage across the varistor with a specified peak impulse current of 8. Varistors are available for a broad range of specifications and are classified by maximum voltage, clamp voltage, peak current, surge energy and response time. Types qualified to aecq200 available in snf automotive series or upon request. A varistor is an electronic component that protects expensive devices from harmful power surges, much like a shock absorber. Bulk on tape and reel on tape in ammopack fanfold the basic ordering code for each option is given in tables titled varistors on tape on reel, varistors on tape in ammopack and varistors in bulk. The varistors are suitable for handmounting bulk or automatic pick and place mounti ng tape on reel or fanfold.
They have the capability to absorb high transient energies and. Line voltage operation, radial lead datasheet catalog. Varistor testing introduction this note details the common tests of varistor parameters and describes suitable test methods using simpli. The test circuits and methods given herein are intended as a general guide. It s called varistor or transient surge absorbers 18v1. Fzk105 upd101 snf10 sn761 taa700 fzh111 mfc8010 fzj101 mfc8001 text. Oct 02, 2014 suscribete siguenos en facebook curso electronica aprender completo fuente conmutada pdf baixar download basic. All tests are performed at 25oc, unless otherwise speci. A standard silicon carbide is different from the metal oxide varistor in the way that a mov exhibits less leakage current and its. Stacking many varistors in a series as one varistor can increase the clamp voltage of a mov. The power so developed must be within the specifications shown on the. A varistor is an electronic component with an electrical resistance that varies with the applied voltage.
Mov metal oxide varistor 24z50 harris 100j west florida. Epcos, alldatasheet, datasheet, datasheet search site for electronic. Glass encapsulated smd varistor mlv avx corporation. Varistor voltage, 56 erzv10d820 to erzv10d182cs part no. Varistor, metal oxide, 630pf, 100a, clamping, 710v, varistor 430v, s20k275. Varistor datasheet, varistor pdf, varistor data sheet, datasheet, data sheet, pdf. Transient vc clamping transient voltage transient current protected smd transient voltage suppressors n formation or designer overvoltage clamping voltage level. V1maa vb c v1maa vb c apower voltage ripple coefficient usually take 1. Vdr metal oxide varistors standard vishay intertechnology.
Varistor symbol and applications metal oxide varistor. Tnr15g221k varistors datasheet pdf oxide varistors. Varistor datasheet, varistor pdf, varistor data sheet, datasheet, data sheet, pdf, page 3 home all manufacturers by category part name, description or manufacturer contain. However, when the surge voltage exceeds the varistor voltage, the impedance across the varistor terminals decreases sharply. This disadvantage of semiconductor varistor can be overcome if we use metal oxide varistor. S10k300 varistor 300vrms 10mm radial epcos inc datasheet pdf data sheet free from datasheet data sheet search for integrated circuits ic, semiconductors and other electronic components such as resistors, capacitors, transistors and diodes. In the case of metal oxide varistors, grains of zinc oxide or oxides of other metals are used. Smd transient voltage suppressors table of contents. Construction round varistor element, leaded coating. The parts can be soldered by hand or wave soldering. Amperes volts amperes joules pf 11 14 16 20 100 36 1 0.
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