Also known as a voltagedependent resistor vdr, it has a nonlinear, non ohmic currentvoltage characteristic that is similar to that of a diode. Amperes volts amperes joules pf 11 14 16 20 100 36 1 0. Littelfuse datasheet, high surge current radial lead metal oxide varistor ultramov varistor series, march 2001. Mouser is an authorized distributor for many varistor manufacturers including avx. They are also known by the name vdr voltage dependent resistor and have nonohmic characteristics. Transistor, diode, ic, thyristor or triac semiconductor protection. Circuit protection from transient voltage by varistor. Varistor provide protection by voltage clamping method which is similar to that in a zener diode.
Varistor voltage v 9 series standard products are taping style. The energy of the incoming surge is partially conducted and partially. Pdf download jan 26, 2015 varistors, also called metaloxide varistors movs, are used to protect sensitive circuits from a. Stacking many varistors in a series as one varistor can increase the clamp voltage of a mov. Metaloxide varistors movs ultramov varistor series mouser. The energy of the incoming surge is partially conducted and partially absorbed, protecting the circuit. Vdr metal oxide varistors standard vishay intertechnology. The device characteristics and parameters in this data sheet can and do vary in different. S14k150 varistor 150v rms 14mm radial epcos inc datasheet pdf data sheet free from datasheet data sheet search for integrated circuits ic, semiconductors and other.
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. Line voltage operation, radial lead datasheet catalog. The metal oxide varistors offer a choice of varistor voltages from. 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. Even though the name varistor is derived from the terms variable resistor, the resistance in. For more information on this article, circle 334 on reader service card. Varistor, 10d241k datasheet, 10d241k circuit, 10d241k data sheet.
V1maa vb c v1maa vb c apower voltage ripple coefficient usually take 1. 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. Even though the name varistor is derived from the terms variable resistor, the resistance in varistor cant be varied manually unlike potentiometer or rheostat where the resistance can be varied manually between their maximum and minimum values. Select the right varistors for overvoltage circuit protection.
Metal oxide varistor mov, basics, working, specifications. Varistor datasheet, varistor pdf, varistor data sheet, datasheet, data sheet, pdf. Mov radial 125 vac varistors, mm varistors, mov smdsmt 15 vdc varistors, 140 vac 198 v to 242 v varistors, mov mov20dxxxk varistors, mov 250 vac varistors recordcount images are for. The metal oxide varistor is designed to protect various types of. Varistor, 10d221k datasheet, 10d221k circuit, 10d221k data sheet. Varistor schematic symbol learning about electronics. Applications n power supplies n power systems n line. A series metal oxide varistor high voltage axial lead 85c maximum temperature actual size, varistor axial lead unit. Item main material coating material marking appearance zinc oxide epoxy. Maximum energy during the application of one pulse of current, a certain energy will be. Fast response to the rapidly rising surge voltage m. Specifications are subject to change without notice. Varistors are available for a broad range of specifications and are classified by maximum voltage, clamp voltage, peak current, surge energy and response time. S10k150 varistor 150vrms 10mm radial epcos inc datasheet pdf.
The quantity of dissipation energy is a function of. Metal oxide varistors overvoltage protection device raychem circuit protection products product. Ceramate, alldatasheet, datasheet, datasheet search site for electronic components and. Users should verify actual device performance in their specific applications. Since a varistors task to clamp excess voltage down to ground, it is put in parallel to. 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. A varistor is an electronic component with an electrical resistance that varies with the applied voltage. Thermofuse varistor description the thermofuse varistor tvz is a family of transient voltage surge suppression.
Thermally protected movs improve transient suppression. Products recommended for poc use poc filter inductors, chip beads the demand for highspeed automotive onboard interfaces is increasing, with a view towards supporting driving safety, reducing the environmental load, and improving comfort. Plastic package, 1 varistor 1 capacitor 1if skvc 20 a 460 615 180 320 560 615 745 750 220 390 680 750. S14k420 varistor 420vrms 14mm radial epcos inc datasheet pdf. The capacitance parameter in varistor data sheet electrical. Littelfuse datasheet, high surge current radial lead metal oxide varistor ultramov varistor. It is called so as the component is made from a mixture of zinc oxide and other metal oxides like cobalt, manganese and. Transient vc clamping transient voltage transient current protected smd transient voltage suppressors n formation or designer overvoltage clamping voltage level. Energy typical capacitance part number acrms dc dc volts. Allowable voltage varistor voltage withstanding surge current 8 20. Sep 22, 2015 varistor provide protection by voltage clamping method which is similar to that in a zener diode. Peak voltage across the varistor with a specified peak impulse current of 8. You can see the varistor is in parallel to the circuit to the right. S10k150 varistor 150vrms 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.
The mov20dxxxk series of 20 mm radial leaded varistor devices protects against overvoltage transients such as lightning, power contact and power induction. Mov14dxxxk series metal oxide varistor rohs directive 200295ec jan. When the circuit is exposed to a high voltage transient, the varistor starts to conduct and clamps the transient voltage to a safe level. What is the meaning of the capacitance parameter in the datasheet of a varistor. When the voltage increase above the threshold of the varistor, the suppressor draws a rapidly increasing current. S10k150 varistor 150vrms 10mm radial epcos inc datasheet pdf data sheet free from datasheet data sheet search for integrated circuits ic, semiconductors and other. I have noticed that 7mm 430 varistor voltage07d431k and 14mm 430 varistor voltage 14d431k have the. Littelfuse datasheet, thermally protected metal oxide varistor tmov varistor, march 2001. For this reason, varistors are also called metaloxide varistors mov. The name has been coined by linguistic blend of words. Jan 26, 2015 the mova s datasheet will provide a pulserating curve. Jan 26, 2015 select the right varistors for overvoltage circuit protection. S14k420 varistor 420vrms 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. Varistor datasheet, varistor pdf, varistor data sheet, datasheet, data sheet, pdf home all manufacturers by category part name, description or manufacturer contain.
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. Smd transient voltage suppressors table of contents. Varistor symbol and applications metal oxide varistor. A series metal oxide varistor high voltage axial lead 85c. 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. A varistor is a varying resistor whose resistance depends on the applied voltage. The ultramov metal oxide varistor series is designed for applications requiring high peak.
Features n high voltage rating n high current rating n bidirectional n surge protection n fast response time n rohs compliant n agency listing. However, when the surge voltage exceeds the varistor voltage, the impedance across the varistor terminals decreases sharply. Since a varistor s task to clamp excess voltage down to ground, it is put in parallel to electronic circuitry which we want to protect. Varistors are in stock and ship sameday at mouser electronics from industry leading manufacturers. Also known as a voltagedependent resistor vdr, it has a nonlinear, nonohmic currentvoltage. Vdr metal oxide varistors standard additional resources ordering information the varistors are available in a number of packaging options. 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.
Varistors are voltage dependent resistors with symmetrical ui characteristic curve, the. Plastic package, 1 varistor skvc 20 a 251 skvc 20 a 460 250 460 120 120 45 45 45 45 145 121 plastic package, 1 varistor 1 capacitor 1if skvc 20 a 460 615 180 320 560 615 745 750 220 390. The metal oxide varistor or mov is a voltage dependent, nonlinear device that provides excellent transient voltage suppression. Varistor datasheet, varistor pdf, varistor data sheet, varistor manual, varistor pdf, varistor, datenblatt, electronics varistor, alldatasheet, free, datasheet. Therefore, they come under non linear type of resistors.