They are a type of nonlinear device that feature similar characteristics to zener diodes. New ordering codes implemented refer to chapter varistor type crossreference list block varistors siov metal oxide varistors. The devices have a high current handling, high energy absorption capability. Because of the metal oxide, the device has been named a metal oxide varistor and has been trademarked mov. This type contains a ceramic mass of zinc oxide grains, in a matrix of other metal oxides, such as small amounts of bismuth, cobalt, manganese oxides, sandwiched between two metal plates, which constitute the electrodes of the device. Nanoenabled metal oxide varistors article in ieee transactions on dielectrics and electrical insulation 164. 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. Siov d32k k6 siov d60k k6 siov d40k qk6 siov d80k k6 note.
Siov siov metal oxide varistors metal oxide va ristors 2008 published by epcos ag corporate center edition 112007 ordering no. They are used to protect vulnerable electronic circuits and components from overvoltage conditions that can cause damage. Nominal discharge current i n according to ul 1449, 4 th edition. Vdr metal oxide varistors standard additional resources ordering information the varistors are available in a number of packaging options. Nippon chemicon corporation metal oxide varistorstnr manufacturing and selling capacitors and electronics components. Maida littelfuseharris panasonicznr epcos siov 18 05d180k d58zov110ra00 v18za05 erzv05d180 s05k11 22 05d220k d58zov140ra00 v22za05 erzv05d220 s05k14 27 05d270k d58zov170ra00 v27za05 erzv05d270 s05k17. Siov metal oxide varistors leaded varistors, automotive 42 v series seriestype. Thereafter, insulation resis tance rins shall be measured at v 500 v insulated varistors. This type contains a ceramic mass of zinc oxide grains, in a matrix of other metal oxides, such as small amounts of bismuth, cobalt, manganese oxides, sandwiched between two metal. Epcos metal oxide varistors are designed for specific applications and should not be used for purposes not identified in our specifications, application notes and data books unless oth erwise agreed with.
Zenamic is the registered trademark for our oxidized metal varistors. They are bilateral and symmetrical v1 characteristics curve and unparalleled large peak current capabilities are used for absorption of transient voltage, suppression of pulse noise and circuit voltage stabilization. Siov metal oxide varistors data book 2008 schmidmultitech sro. Tdk metal oxide varistors series siov s05, s07, s10, s14 pitch.
Features include high energy absorption and surge load capabilities, low leakage currents, selfprotection under abnormal overvoltage conditions, multilayer structures, lead free plating terminal electrodes and large electrostatic resistance. A leakage current, b protection level for worstcase varistor tolerances siov snf14. Nominal discharge current in according to ul 1449, 4th edition. Components for lowvoltage surge protection part 332. A operating conditions and circuit design 1 varistor shall not be operated beyond the, breakdown, flaming or glowing. Var series metal oxide varistor movs a varistor is an electronic component with a significant nonohmic currentvoltage characteristic.
Rga series zinc oxide varistors are nonlinear resistors, consisting mainly of zinc oxide and several kinds of metal oxide additives. The metal oxide varistor or mov for short, is a voltage dependant resistor in which the resistance material is a metallic oxide, primarily zinc oxide zno pressed into a ceramic like material. Leaded varistors, snf high operating temperature varistors b722. The metal oxide varistor, with its extremely attractive price performance ratio. B72207s0321k101 datasheet, b72207s0321k101 datasheets, b72207s0321k101 pdf, b72207s0321k101 circuit.
Load dump or jump start can decrease the varistor voltage in load direction by max. B72220s0271k101 datasheet936 pages epcos siov metal. Epcos metal oxide varistors are designed for specific applications and should not be used for purposes not identified in our specifications, application notes and data books unless otherwise agreed with epcos during the designinphase. Nippon chemicon offers varistors, which are also suitable for automotive compliance according to aecq200. Metal balls method, 2500 vrms, 60 s the varistor is placed in a container holding 1. Metal oxide varistor mov, basics, working, specifications.
Selection and application principles for metal oxide varistors mov. Please read cautions and warnings and page 7 of 23 important notes at the end of this document. Metal oxide varistors, more commonly known as movs are devices that provide excellent transient voltage suppression. The ciii series of metal oxide varistors are specifically designed for applications requiring high surge energy absorption ratings and superior multiple pulse absorbtion rating. Metaloxide varistors movs tmov and itmov varistor series. A test current of 1 ma dc is typically used to determine. No breakdown leaded varistors b722 advancedmp, s10 series. Siov metal oxide varistors leaded varistors, standard series seriestype. Siov metal oxide varistors, leaded varistors, snf high operating temperature varistors. 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 between the terminals of a device varistor voltage test characteristic that is used to classify varistors by type.
A varistor is an electronic component with an electrical resistance that varies with the applied. Contact epcos for consultancy on this kind of problem. No breakdown leaded varistors b722 telecom series please read cautions and warnings and. It is also a non linear device and provides very good transient voltage surge protection.
Metal oxide varistor mov technology is the most prevalent technology utilized in electrical transient protection products today. Siov metal oxide varistors general technical information. Metal oxide varistor basics mov is the most commonly used type of varistor. Siov varistors have proven to be excellent protective devices because of their application flexibility and high reliability.
Metal oxide varistors mov data sheet features wide operating voltage v 1ma range from 18v to 1100v fast responding to transient overvoltage large absorbing transient energy capability low. Make us your source for harris metal oxide varistors and other products. The most common type of varistor utilise a metal oxide and hence they are often known as metal oxide varistors, or mov for short. Epcos varistors and thermistors epcos tdk ul rated ctvs varistors. Thereafter, insulation resis tance rins shall be measured at v 500 v insulated varistors only. Published by epcos ag corporate center edition 112007 ordering no. Stability of zinc oxide varistors a thesis submitted to the university of manchester for the degree of doctor of philosophy in the faculty of engineering and physical. Topdiode var series of transient voltage surge suppressors are radial leaded varistors. Zenamic features large surge current handling ability and transient overvoltage handling. On the use of metal oxide varistors as a snubber circuit in solidstate breakers. The energy absorptions of the two varistors are in the same ratio. Many industry manufacturers, including current technology, integrate various sizes of radial or straptype movs into their products. The overview of delivery mode on pages 11 ff lists disk types available on tape in detail, i.
The metal oxide varistor, with its extremely attractive price performance ratio, is an ideal component for limiting surge voltage and current as well as for ab sorbing. Pdf on the use of metal oxide varistors as a snubber. When solidstate switches are used in dcbreaker topologies, the turnoff operation can cause transient overvoltages that might. Introduction this note details the common tests of varistor. Vdrh series vdr metal oxide varistors high surge vishay. Siov metal oxide varistors b72220wr thermofuse varistors, nt series nt20 series. Upon request are available the varistor elements without plastic housing suitable for soldering. Metal oxide varistor disc type siov s10k510gs5 ordering. Metal oxide varistor disc type siov s10k510gs5 ordering code. Metal oxide varistors mov data sheet features wide operating voltage v 1ma range from 18v to 820v fast responding to transient overvoltage large absorbing transient energy capability low. If the load remains under the maximum ratings, polarity reversal may be admissible. Metal oxide varistors high energy disc varistor series metal oxide disc varistors features the disc varistor series of transient surge suppressors are industrial provided in disc form for unique packing by highenergy disc varistors movs intended for special applications customer requiring unique electrical contact or packaging methods.
The metal oxide varistors offer a choice of varistor voltages from 18 v to 1800 v and vrms voltages from 11 v to 1100 v. Siov metal oxide varistors block varistors, highe series seriestype. Catalogs supplier resources supply chain transparency technical documents. The varistors are available in a number of packaging. Modeling metal oxide varistors mov in short circuit calculations krishnat patil staff software engineer krishnat. Figure 2 shows the conduction mechanism in a varistor element in original pdf k abstract. Test objectives varistor testing thatresources versus more extensive vristor testing. Distributor of metal oxide, thermofuse and multilayer varistors. The most common modern type of varistor is the metal oxide varistor mov. Siov metal oxide varistors b72220wr thermofuse varistors, nt series nt20 series ppd var pd 20181009 please read cautions and warnings and page 3 of 19 important notes at the end of this. Metal oxide varistor is a voltage dependent resistor. This means that if unselected varistors are used in this current region, current distributions of up to. Epcos siov metal oxide varistors,alldatasheet, datasheet, datasheet.
E2 leaded varistors, snf high operating temperature b722 snf automotive series please read cautions and warnings and page 6 of 20. The metal oxide varistor, with its extremely attractive priceperformance ratio, is an ideal component for limiting surge voltage and current as well as for absorbing energy. For further details refer to chapter taping, packaging and lead configuration for leaded varistors. Siov metal oxide varistors siov cu3225k250g2h3 smd varistors, monolithic cu b72651m0251k072 data sheet issue date 28. Then stored at room temperature and normal humidity for 1 to 2 h. Epcos is aleading manufacturer of electronic components and modules and.
Mov please answer as many questions as you can with 1 being unfavorable and 5 most favorable. To assure our customers quality harris metal oxide varistors and other products and services at international standards, galco maintains iso90012000 certification. It is called so as the component is made from a mixture of zinc oxide and other metal oxides like cobalt, manganese and so on and is kept intact between two electrodes which are basically metal. The metal oxide varistors offer a choice of varistor. Epcos metal oxide varistors siovs are designed for specific applications and should not be used for purposes not identified in our specifications, application notes and data books unless otherwise agreed with epcos during the designinphase. Siov metal oxide varistors leaded varistors, snf high operating temperature varistors, snf advanced series. Siov s20v42autos5d1 leaded varistors b722 automotive series for 42 v please read. Metal oxide varistors movs radial lead varistors ciii varistor series should transients occur in rapid succession, the average power dissipation is the energy wattseconds per pulse times the. Siov b60k datasheet, cross reference, circuit and application notes in pdf format. Please read cautions and warnings and page 6 of 22 important notes at the end of this document.
B72220s0271k101 datasheet, b72220s0271k101 datasheets, b72220s0271k101 pdf, b72220s0271k101 circuit. Sep 22, 2015 metal oxide varistor mov to overcome the limitations of semiconductor based varistors like silicon carbide varistors, the metal oxide varistors mov have been developed. S disk type 10 rated disk diameter k tolerance of vv at 1ma. The specified voltage shall be applied between both terminals of the specimen connected together and the electrode inserted between the metal balls. It is called so as the component is made from a mixture of zinc oxide and other metal oxides like cobalt, manganese and so on and is kept intact between two electrodes which are basically metal plates. Metal oxide varistors when to use varistor vs tvs diode. Metal oxide varistors mov part number cross reference guide. Ensure suitability of siovs through reliability testing during the designin phase. Metal oxide varistors consist of approximately 90% zinc oxide as a ceramic base material plus other filler materials for the. B72220s0271k101 datasheet836 pages epcos siov metal. Bulk standard, taped versions on reel or in ammo pack upon request. Nippon chemicon corporation metal oxide varistorstnr. A leakage current, b protection level for worstcase varistor tolerances siov b32k. Metal oxide varistor resistors mov online electronic.
Siov metal oxide varistors varistor type crossreference list. Varistor symbol and applications metal oxide varistor. Numerical modelling of metal oxide varistors boris zitnik1, maks babuder1, michael muhr2, mihael zitnik3 and rajeev thottappillil3 1 milan vidmar electric power research institute, ljubljana, slovenia 2 institute of highvoltag e en gi neerin and system mana m t, graz, austria. Surface mountable mov metal oxide varistor devices facilitate customs in smt. We also have an extensive resource database for sourcing and crossreferencing parts.