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. Varistors are available for a broad range of specifications and are classified by maximum voltage, clamp voltage, peak current, surge energy and response time. Metaloxide varistors movs surface mount multilayer varistors mlvs mla series peak current and energy derating curve when transients occur in rapid succession, the average power dissipation is the energy wattseconds per pulse times the number of pulses per second. Plastic package, 1 varistor 1 capacitor 1if skvc 20 a 460 615 180 320 560 615 745 750 220 390 680 750.
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. 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. Circuit protection from transient voltage by varistor. Nte1v010 thru nte1v300 nte2v010 thru ntev480 nte524v thru. Tyee series zinc oxide varistor are nonlinear resistors, consisting main of zinc oxide and several kinds of metal oxide additive. Block varistors construction diskshaped varistor element, potted in plastic housing housing flameretardant to ul 94 v0 screw terminals m4 siovb32 40 screw terminals m5 siovb60 80 features heavyduty varistors surge current capability up to 100 ka wide product range siovb40 also available without housing ls40 series. The varistors are suitable for handmounting bulk or automatic pick and place mounti ng tape on reel or fanfold. Therefore, they come under non linear type of resistors. The power so developed must be within the specifications shown. Datasheet search engine for electronic components and semiconductors. The name has been coined by linguistic blend of words.
Varistors are available for a broad range of specifications and are classified by maximum voltage, clamp voltage, peak. They are bilateral and symmetrical vi characteristics. The parts can be soldered by hand or wave soldering. The quantity of dissipation energy is a function of. Sm20 series 20 mm smd varistors the littelfuse sm20 series is a surfacemount metal oxide varistor for applications requiring high energytransient current capability. A varistor is an electronic component with an electrical resistance that varies with the applied voltage. Features n high voltage rating n high current rating n bidirectional n surge protection n fast response time n rohs compliant n agency listing.
Select next varistor diameter level and then reverify 3e. In contrast to a diode however, it has the same characteristic for both directions of traversing current. As a result this form of device is often called a metal oxide varistor, or mov. Specifications are subject to change without notice.
Ultramov 25s varistor series littelfuse ultramov 25s varistor series are designed for applications requiring high peak surge current ratings and highenergy absorption capability. When the voltage increase above the threshold of the varistor, the suppressor draws a rapidly increasing current. However, when the surge voltage exceeds the varistor voltage, the impedance across the varistor terminals decreases sharply. 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. Select next varistor diameter level and then reverify 3d.
Varistor provide protection by voltage clamping method which is similar to that in a zener diode. If varistor voltage is below 82v, selecting an 82v rov may be. 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 460 615 180 320 560 615 745 750 220 390 680. Varistor voltage the voltage across the varistor at a dc current of 1. 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 electronic components such as resistors, capacitors, transistors and diodes.
Vdr metal oxide varistors standard vishay intertechnology. Allowable voltage varistor voltage withstanding surge current 8 20. Varistor datasheet, varistor pdf, varistor data sheet, datasheet, data sheet, pdf. Vdr metal oxide varistors standard additional resources ordering information the varistors are available in a number of packaging options. They are also known by the name vdr voltage dependent resistor and have nonohmic characteristics. This type of structure utilises a diode characteristic to provide the variable resistance. Varistor datasheet, varistor pdf, varistor data sheet, datasheet, data sheet, pdf home all manufacturers by category part name, description or manufacturer contain. Energy ratings are based on a shift of varistor voltage of less than 10% of the initial value.
Select lower varistor diameter level and then reverify 3c, 3d, 3e and 3f. Line voltage operation, radial lead datasheet catalog. Energy the maximum electrical energy which can be dissipated within the varistor by a single impulse of 10 x s current waveform with continuous voltage applied. Metal oxide varistor mov, basics, working, specifications. The varistor is bidirectional and is based around a ceramic or metal oxide. If varistor voltage is below 82v, selecting an 82v rov may be preferable over a higher diameter part. Please confirm technical specifications before you order andor use. V1maa vb c v1maa vb c apower voltage ripple coefficient usually take 1.
Pdf d7580zov321ra640 8x20us 10xus e86730 e38785 lr33468 varistor 503. 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 capacitance parameter in varistor data sheet electrical. Applications n power supplies n power systems n line voltage n telecom systems n white goods appliances mov20dxxxk series metal oxide varistor rohs directive 2015863, mar 31, 2015 and annex. Metal oxide varistors overvoltage protection device raychem circuit protection products product. Varistors are in stock and ship sameday at mouser electronics from industry leading manufacturers.
When the voltage to a circuit is low or within acceptable limits, the varistor has a very high resistance. Metaloxide varistors movs surface mount multilayer. Mov14dxxxk series metal oxide varistor rohs directive 200295ec jan. There are three subsidiary companies under sfi groups, including sun flower semiconductor co. The power so developed must be within the specifications shown on the. Nvd metal oxide varistor disc type koa speer electronics, inc. What is the meaning of the capacitance parameter in the datasheet of a varistor. Sem5025 datasheet led driver control ic samsung, sem5025 pdf, sem5025 pinout, sem5025 data, sem5025 circuit, manual, sem5025 schematic, reference. Smd transient voltage suppressors table of contents. A simple varistor circuit learning about electronics. Mu503 datasheet, mu503 pdf, mu503 data sheet, mu503 manual, mu503 pdf, mu503, datenblatt, electronics mu503, alldatasheet, free, datasheet, datasheets, data sheet.
Varistor specification tyee varistor varistor are voltage dependent, nonlinear device which have an electrical behavior similar to backtoback zener diodes. Sep 22, 2015 varistor provide protection by voltage clamping method which is similar to that in a zener diode. Bending of the leads for different angle placement is not recommended. Also known as a voltagedependent resistor vdr, it has a nonlinear, nonohmic currentvoltage characteristic that is similar to that of a diode. Users should verify actual device performance in their specific applications.
Nvs03 varister, sv03ys varistor diode, used in kenwood models, hss101 diode, view as. Peak voltage across the varistor with a specified peak impulse current of 8. Stacking many varistors in a series as one varistor can increase the clamp voltage of a mov. Epcos metal oxide varistor siov metal oxide varistors highe series. 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. Since the varistor has such a high resistance, current does not flow through it. 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. Varistor symbol and applications metal oxide varistor. Avx miniature mav series varistors have been designed to provide transient voltage protection in low power ac applications and also in higher dc voltage data lines or. Transient vc clamping transient voltage transient current protected smd transient voltage suppressors n formation or designer overvoltage clamping voltage level. S14k150 varistor 150v rms 14mm radial epcos inc datasheet pdf.
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