It is also a nonlinear device and provides very good transient voltage surge protection. Tvr10431 high surge zinc oxide varistor components datasheet pdf data sheet free from datasheet data sheet search for integrated circuits ic, semiconductors and other. Pdf zinc oxide zno varistors is a solid state electronic ceramic component whose function to protect electronic devices against over voltage surges. Erzcf1mk820 metaloxide varistor components datasheet pdf data sheet free from datasheet data sheet search for integrated circuits ic, semiconductors and other. The metal oxide varistor, mov, is the most widely used form of varistor. 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.
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 applied voltage. The 10% of metal oxides of cobalt bismuth and manganese act as a binding agent to zinc oxide grains so that it is kept intact in between the two metal plates. Tvr10471 datasheet843 pages etc1 zinc oxide varistor 50. Pdf effect of sintering temperature on zinc oxide varistor. This product has tvr series zinc oxide varistor functions. Zinc oxide varistors are strongly nonlinear resistors that have been used to regulate transient voltage surges of unwanted magnitude for high voltage and powerrelated applications, such as surge. Effect of sintering temperature on zinc oxide varistor ceramics article pdf available in iop conference series materials science and engineering 4401. Zinc oxide znobased pastes with tailored rheological properties have been developed for directwrite fabrication of thickfilm varistor elements in highly integrated, multifunctional electroceramic devices. Part no maximum allowable voltage maximum energy 10s j maximum peak current 820s rated power varistor voltage clamping voltage max.
Both bi 2o 3rich and zn 7sb 2o 12 spinel phases are also usually present at the grain boundaries of the zno, but the presence of a bi 3zn 2sb3o14 phase is possible as well. Var series zinc oxide varistor va r d k packing type. Varistor symbol and applications metal oxide varistor. Zinc oxide varistor suntan tsv zinc oxide varistor 14d specification part no maximum allowable voltage maximum energy 10s j maximum peak current 820s rated power varistor voltage clamping voltage max. Zinc oxide zno varistor, which is a kind of polycrystalline semiconductor ceramic composed of multiple metal oxides and sintered using conventional ceramic. Zinc oxide varistor key features extended temperature range up to 125c higher energy rating than comparable sic ceramics higher continuous power rating dimensions. Varistor voltage voltage across the varistor measured at 1madc see. It is generally manufactured from a material such as zinc oxide, zno, although another. A test current of 1 ma dc is typically used to determine. The percentage of znon was varied from 2 weight percent. Tvr10681 datasheet pdf 14 page list of unclassifed manufacturers. Zinc oxide znobased pastes with tailored rheological prop erties have been developed for directwrite fabrication of thickfilm varistor elements in highly. Zno is a white powder that is insoluble in water, and it is widely used as an additive in numerous materials and products including rubbers, plastics, ceramics, glass, cement, lubricants, paints, ointments, adhesives, sealants, pigments, foods, batteries, ferrites, fire retardants, and firstaid tapes. This second phase consists of a certain number of metallic oxides bi 2o 3,mno,sb 2o 3, etc.
Tvr14621 tvr series zinc oxide varistor, pdf, pinout, equivalent, replacement, schematic, manual, data, circuit, parts, datasheet. Tvr10471 datasheetpdf 8 page list of unclassifed manufacturers. Tvr10471 datasheet843 pages etc1 zinc oxide varistor. Metal oxide znobased varistor ceramics 331 conductors.
The zno varistor is a mutiphase polycrystalline ceramic made by. Zinc oxide varistors ve 07091724 vf 0507101420 features radial lead varistors wide operating voltage range from 14 v to 625 v v rms for ve types or 22 v to v v 1ma for vf. These varistors are composed of zinc oxide an d some other metal oxides, which provide the. Tvr10471 datasheethtml 8 page list of unclassifed manufacturers. The most common modern type of varistor is the metal oxide varistor mov. Typical capacitance reference ac rms v dc rms v w v 1. After shaping, the varistors are sintered at high temperatures in speci. It s called varistor or transient surge absorbers 18v1. Radial lead varistors wide operating voltage range from 14 v to 625 v v. Varistors are voltage dependent, nonlinear devices which have electrical characteristics similar to backto. Sos electronic is an authorized distributor of semikron. Such pastes exhibited pseudoplastic behavior with a low shear apparent viscosity of roughly 1 104 pas. Ingredients zinc oxide varistors consist mainly of zinc oxide about 90 % by weight and small amounts of other metal oxides additives such as bismuth, cobalt, antimony and manganese oxide.
Specialty movs metal oxide varistors are available in unique form fits and possess various voltage range and surge capabilities. Are nonlinear resistors utilize a semiconductor electronic ceramic element mainly composed of zinc oxide and its resistors change as. Tvr10681 datasheetpdf 14 page list of unclassifed manufacturers. Integrated varistors consist of a 40ka varistor building block mov with an integral thermally activated element. Bionanocomposites bncs were prepared using sago starch ss based polymer embedded with nanorods zinc oxide znon as nanofiller. They exhibit a highly nonlinear currentvoltage relation with a 5%. Vdr metal oxide varistors standard additional resources ordering information the varistors are available in a number of packaging options. 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.
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. They exhibit a highly nonlinear currentvoltage relation with a 5% change in voltage serving to increase the current flow an order of magnitude or more. The effects of zinc oxide microstructure on the electrical characteristics of lowvoltage ceramic varistors kesan mikrostruktur zink oksida terhadap ciriciri elektrik varistor seramik voltan rendah by shahrom mahmud thesis submitted in fulfillment of the requirements for the degree of master of science january 2004. Apr 26, 2017 tvr14621 tvr series zinc oxide varistor, pdf, pinout, equivalent, replacement, schematic, manual, data, circuit, parts, datasheet. It forms the heartof the varistor effect since its electrical.
Ohwada skip to main content accessibility help we use cookies to distinguish you from other users and to provide you with a better experience on our websites. Pdf metal oxide znobased varistor ceramics researchgate. It is used in animal feed as a zinc supplement and as a fertilizer additive for zincdeficient soils. Zinc oxide varistors are a polycrystalline structured material consisting of semiconducting zinc oxide crystals and a second phase located at the boundaries of the crystals. Metaloxide varistors are manufactured with traditional ceramic process technology.
Tvr10681 datasheet1443 pages etc1 zinc oxide varistor 50. It is used in animal feed as a zinc supplement and as a fertilizer additive for zinc deficient soils. Figure 3 shows the conduction mechanism in a varistor element in simplified form. 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. 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.
It is generally manufactured from a material such as zinc oxide, zno, although another material that is used is silicon carbide, sic and this provides similar properties. Author links open overlay panel witold mielcarek krystyna prociow. The maximum current with a varistor voltage change of less than 10% when one impulse of an 8x20us current waveform is applied. 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. Tvr10241 datasheet pdf pinout high surge zinc oxide. The zinc oxide grains them selves are highly conductive, diodes protection level approx. Typical capacitance reference ac rms v dc rms v w v. These varistors are composed of zinc oxide and some other metal oxides, which provide the.
Both bi 2o 3rich and zn 7sb 2o 12 spinel phases are also usually present at the grain boundaries of the zno, but the presence of a bi 3zn. Zinc oxide varistor is a nonlinear resistance device, whose voltage and current relationship vary according to the. Zinc oxide varistors consist mainly of zinc oxide about 90 % by weight and small amounts of other metal oxides additives such as bismuth, cobalt, antimony and manganeseoxide. Sandia national laboratories, albuquerque, new mexico 87185 zinc oxide zno based pastes with tailored rheological prop erties have been developed for directwrite fabrication of thickfilm varistor elements in highly integrated, multifunc tional electroceramic devices. Metal oxide varistor is a voltage dependent resistor. Pdf zinc oxide varistors are electronic ceramic materials whose electrical behavior is dominated by grainboundary interface states. Sintering zinc oxide together with other metal oxide additives under specific conditions produces a polycrystalline ceramic whose resistance exhibits a pronounced dependence on voltage. In paints, zinc oxide serves as a mildewstat, acid buffer, and a pigment. Tvr10681 datasheet1443 pages etc1 zinc oxide varistor. Zinc oxide is an inorganic compound with the formula zn o. The shock time is the function of wave shape, amplitude and interval time,when the amplitude decrease to 50% of the initial, it should be increased to 2 times of the initial in order to keep. Ve24m00251k active zinc oxide bi2o3 k 250 varistor zinc oxide varistors varistor text. Degradation of zinc oxide varistors mrs online proceedings. Varistor voltage voltage across the varistor measured at 1madc see specification sheet peak voltage across the varistor with a specific peak impulse current applied 8x20us.
Zinc oxide varistors are strongly nonlinear resistors that have been used to regulate transient voltage surges of unwanted magnitude for high voltage and powerrelated applications, such as surge arresters in power transmission and distribution for the protection of electronic devices. Zinc oxide varistors are electronic ceramic materials whose electrical behavior is dominated by grainboundary interface states. Thermal stress increases the impact energy absorption capacity of zinc oxide varistors. Tvr10431 high surge zinc oxide varistor components 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 is used in cosmetics and drugs primarily for its fungicide properties, and in dentistry in dental cements. The elec trical behavior of the metal oxide varistor, as, implies that the electrical properties are controlled by.
Varistorlike effect in zinc oxide bionanocomposite. Thus, the current distribution is shifted to the varistor with the lower. These ul recognized varistors require very little mounting space, and are. Sep 22, 2015 metal oxide varistor is a voltage dependent resistor. Zinc oxide varistors ve 07091724 vf 0507101420 features radial lead varistors wide operating voltage range from 14 v to 625 v v rms for ve types or 22 v to v v 1ma for vf types available in tape and reel for use with automatic insertion equipment see pages 31 to 33 for details. The percentage of znon was varied from 2 weight percent wt % to 10 wt % of total solid. An experimental study of the failure mode of zno varistors.
These varistors are composed of zinc oxide and some other metal oxides, which provide the desired characteristics for these varistors. Ingredients zinc oxide varistors consist mainly of zinc oxide about 90 % by weight. The elec trical behavior of the metal oxide varistor, as, implies that the electrical properties are controlled by the physical dim ensions of the varistor. Degradation of zinc oxide varistors volume 5 ken takahashi, t. 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 hvr zno varistors have high voltage dependences and high current absorption. Tvr10241 datasheet, tvr10241 pdf, tvr10241 pinout, equivalent, replacement high surge zinc oxide varistor tks, schematic, circuit, manual. Zinc oxide zno varistors is a solid state electronic ceramic component whose function to protect electronic devices against over voltage surges due to their highly nonlinear electrical. Zno is a white powder that is insoluble in water, and it is widely used as an additive in numerous materials and products including rubbers. Zinc oxide varistors are electronic ce ramic devices whose primary function is to sense and limit i. Mechanical properties and microstructure of zinc oxide. Jan 19, 2017 the shock time is the function of wave shape, amplitude and interval time,when the amplitude decrease to 50% of the initial, it should be increased to 2 times of the initial in order to keep the life longer, the surge current which is absorbed by the varistor should be less than max.
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