how to identify a varistor

Varistor Light Dependent Resistor; Carbon Composition Resistor. 22kA 625 Joules 385Vac working voltage. Please add photos of both sides of this part of the board. http://www.digikey.com/product-detail/en/littelfuse-inc/V25S385P/F7181-ND/2297519, Podcast Episode 299: It’s hard to get hacked worse than this, The capacitance parameter in varistor data sheet, How to choose the right Metal Oxide Varistor (MOV), AC/DC power supply: help to choose fuse, varistor and/or TVS diode. 2. A higher number indicates greater protection. They typically fail short, so probably this blew a fuse if the overheated traces on the PCB are still intact (check them and bypass them if they are damaged). The choice of a varistor involves three main steps: Select varistors that are suitable for the operating voltage. TDK Electronics 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 TDK Electronics during the design-in-phase. What makes representing qubits in a 3D real vector space possible? Digikey probably has enough in stock (13,359) to cover your immediate needs, at a very reasonable price. That removes any doubt about it being a MOV. Metal OXide Variators (MOV) or now generically referred to as SIOV's are commonly rated by their RMS withstanding voltage or 385Vac in this case, then above this by a Joule rating 05 (which seems low). If the fuse is blown, set it aside and make a note to replace it. Look around at likely parts on their web site. Thanks, it's 4mm thick by about 5mm wide , the problem is that size doesn't match anything near in the 385v section. The figure below shows the structure of metal oxide varistor: Here the varistor is formed 90% with zinc oxide and the rest is filler material that forms the junction. I provided water bottle to my opponent, he drank it then lost on time due to the need of using bathroom. It is two terminals, solid state semiconductor device. 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 … Their resistance decreases when the voltage increases. The circuit is part of a control module for the headlights and keyless entry on a Lincoln. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. This varistor was burnt and needs to be replaced, however I'm having trouble identifying it, and am unsure what the numbers mean. Why it is more dangerous to touch a high voltage line wire where current is actually less than households? Definition: The term Varistor is formed by the combination of two words Variable and Resistor. In most cases, we can use the printing logo to identify whether it is a ceramic capacitor or a varistor, but there may be printing errors, unclear printing, no printing, etc. Now that you've shown a picture of the board, we can see that the part designator is MOV1. A gadget may have thousands of transistors, resistors and other components, but only one or two varistors. (low cost), http://www.digikey.com/product-detail/en/littelfuse-inc/V25S385P/F7181-ND/2297519. The markings are : Use MathJax to format equations. What is the spiritual relationship between faith, hope and love when perfection comes and the imperfect disappears? site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. What happens when writing gigabytes of data to a pipe? By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. How is HTTPS protected against MITM attacks by other countries? Carbon resistors are mainly made of carbon clay composition covered with a plastic case. 2. It only takes a minute to sign up. A surge in excess of the specified withstanding surge current may cause short circuits or package rupture with expulsion of material; it is therefore recommended that a fuse be put in the circuit using the varistor, or the varistor be used in a protective box Hi I am trying to identify what I think is a varistor. Is it ethical for students to be required to consent to their final course projects being publicly shared? The bottom line of text indicates it was made by TDK. rev 2020.12.18.38240, The best answers are voted up and rise to the top, Electrical Engineering Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. 1146 Varistors are components which protect electronic circuitry from excess power such as that offered in the case of transient voltages. I didn't think knowing the manufacturer is irrelevant, @Tony. Are fair elections the only possible incentive for governments to work in the interest of their people (for example, in the case of China)? It is usually a brightly colored disk the size of a coin. The lead going diagonally across the face makes MOV the most likely. The problem I am having is the markings, other than the voltage don't seem to corrolate with anything. Transient voltages are high-magnitude spikes of voltage which can occur in a circuit. Is there a phrase/word meaning "visit a place for a short period of time"? Understanding the zero current in a simple circuit, Connection between SNR and the dynamic range of the human ear, Split a number in every way possible way within a threshold. Why do different substances containing saturated hydrocarbons burns with different flame? set aside vaccine for long-term-care facilities. Varistor Overview. If it really absorb the surge voltage/current? Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. A varistor that’s received a strong electrical jolt may remain at low resistance and should be tested. As a result this form of device is often called a metal oxide varistor, or MOV. Why can a square wave (or digital signal) be transmitted directly through wired cable but not wireless? By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. The color is too even for it to be a result of getting burned. Varistor, a resistive device with non-linear volt-ampere characteristics, which is mainly used to clamp a voltage and absorb excess current to protect the sensitive devices when the circuit is under overvoltage. The word "varistor" is derived from variable resistor. Thanks for contributing an answer to Electrical Engineering Stack Exchange! It means it is a variable resistance. I am looking to identify a varistor manufacturer which has a blue body with a pryamid shaped logo which consist of 4 horizontal lines with the … What is it called to use random error as evidence? If the varistor is visibly burnt through or broken, it is bad; replace it. Identify the metal oxide varistor. How do I know if my subfloor is fire retardant or preservative-treated? OK. Let's let others decide if it's relevant or not. I haven't pulled the board yet, but I tested for continuity across the two leads of the Varistor and I get no beep. To assure reliable operation, transient voltage suppression should be considered at early stages of the design process. MathJax reference. These must follow a transient filter and current limiting, otherwise they may fail frequently or sooner than expected with limited number of Joules protection cycles. Can one build a "mechanical" universal Turing machine? Why is it that when we say a balloon pops, we say "exploded" not "imploded"? Measure its diameter and lead distance, you can find it in the datasheet. Performance and analytical technologies. Varistors provide over voltage protection to electrical and electronic circuits in contrast to circuit breakers or fuse which … 05 They are also known by the name VDR [voltage dependent resistor] and have non-ohmic characteristics. They can be caused by a number of factors, such as lightning. then followed by a date code YYWW for year and week. Energy absorption / dissipation This rating is given in joules and shows how much energy the varistor can absorb. The resistance of a varistor is variable and depends on the voltage applied. ! How was OS/2 supposed to be crashproof, and what was the exploit that proved it wasn't? To learn more, see our tips on writing great answers. See their Cautions and Warnings. Use MathJax to format equations. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Metal OXide Variators (MOV) or now generically referred to as SIOV's are commonly rated by their RMS withstanding voltage or 385Vac in this case, then above this by a Joule rating 05 (which seems low). They should be able to identify it. A Varistor is a varying resistor whose resistance depends on the applied voltage. If you can't find a part number, you can generally replace it fairly safely with one of the same approximate diameter and voltage rating. What is Varistor (Varistor Working Principle): Varistor is nothing […] A carbon composition resistor (also known as a carbon resistor) is a very commonly used resistor. But we don't need to do that, because @Andyaka (see comments) has found an apparent TDK/EPCOS substitute B72210S1140K102 which is 13mm diameter and plausibly rated for a 12V automotive environment. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. From the board location you would know if the particular component is a Varistor or Capacitor. I've discovered that the varistor did its intended job and shorted due to the power surge - it's burnt to a crisp. I know the k385 is the voltage from what I can find, but have no idea what the current is or what part number it matches up with. Say for example, if a motor will be connected in our proposed outlet, it will require a large starting current. What instruments do … The resistance shows nonlinear behaviour with applied voltage. It is burnt so it appears black. A big screen TV that someone threw away, and I am trying to fix it. Identify Varistor Manufacturer Identify Varistor Manufacturer SteveSmith (Mechanical) (OP) 14 Mar 01 12:11. How to test the varistor (MOV) to know if it really works? Determine the varistor that is most suitable for the intended application in terms of a) surge current, b) energy absorption, c) average power dissipation, (for … The resistance of varistors varies with the applied voltage. Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It's currently part of the 12v input on an electric fence energiser. Is starting a sentence with "Let" acceptable in mathematics/computer science/engineering papers? In most smaller equipment, it is a two-lead, coin-sized device, similar to a disc capacitor with a bright colour, such as red, yellow or blue. 2Pro Devices; ... these cookies remember your preference not to be tracked and identify trusted web traffic. It seems to be a MOV. The word is composed of parts of the words “ var iable res istor. The Metal Oxide Varistor or MOV is a voltage dependent, nonlinear device that provides excellent transient voltage suppression. At the same time, it plays major role in high voltage transmission in electrical, it protects the high voltage equipment from lighting over voltage and surge voltage. A varistor is a voltage dependent resistor (VDR). Ceramic / metal oxide varistor: This form of varistor is the most widely used and it is the form that is often referred to when the term varistor is stated. @MarkFarrow Andy found the number, and Olin got you to post more photos. How do I pinpoint where the error is in Applescript? A metal oxide varistor, or MOV, protects sensitive electronic equipment from voltage spikes in the power line. Varistor: Varistor is used to protect the semiconductor against over voltage. What happens when all players land on licorice in Candy Land? Podcast Episode 299: It’s hard to get hacked worse than this, Need help identifying replacement Magic Smoke Container, Help identifying component on cisco switch SGD110D-08, Help identifying component in digital thermometer, Help Identifying a Component in a Power Supply, Please help me in identifying surface mount component. Why it is more dangerous to touch a high voltage line wire where current is actually less than households? It only takes a minute to sign up. Allow bash script to be run as root, but not sudo, Split a number in every way possible way within a threshold. While it may look similar to a capacitor, you can identify the device by … rev 2020.12.18.38240, The best answers are voted up and rise to the top, Electrical Engineering Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us, interesting background analysis, but the brand logo is irrelevant to finding/choosing/locating a suitable lightning transient replacement (warning opinion). It could also be a thermistor. Asking for help, clarification, or responding to other answers. Don’t be mistaken that a Varistor is a Ceramic Capacitor. Therefore, they come under non linear type of resistors. Identify the fuse inside the case. The 05 is not the Joule rating, it indicates the series name which is S05. the varistor voltage measured at 1 mA does not change by more than 10 % maximum. Connection between SNR and the dynamic range of the human ear. At this time, we must use the instrument to measure to use the business opportunity. These resistors are low cost and easy to construct. It could be a MOV (metal oxide varistor), but other component types are possible too. So, in order to be guaranteed. varistor markings The bottom line of text indicates it was made by TDK. It looks to me like that's its natural gray color. Is the Gloom Stalker's Umbral Sight cancelled out by Devil's Sight? Can you decode an small diagram on how it is placed on the board? The varistor working can be easily understood by having a glance at varistor static resistance curve, which is drawn between resistance of VDR (voltage dependent resistor or … K385 It is usually a brightly coloured disk the size of a coin. It's an EPCOS (now TDK) brand MOV. That looks like the TDK-EPCOS logo (found on a Google image search for "varistor logo"). How should I save for a down payment on a house while also maxing out my retirement savings? The end of the top line is burnt out with only the number 2 visible, but the two lines bellow it read: good find Rohat. Is it in parallel with an AC source or in series? I want to replace the part but can't seem to identify it's value so I can match it up. Varistor is a passive nonlinear two terminal solid state semiconductor device. Asking for help, clarification, or responding to other answers. It could be a MOV (metal oxide varistor), but other component types are possible too. A varistor is an electronic component with an electrical resistance that varies with the applied voltage. It got hot enough to melt the plastic case of the module, and burn the trace on back of the circuit board. This can be a complex task as electronic components are increasingly sensitive to stray electrical transients. How to check if the varistor really absorbed it? The Metal Oxide Varistor is designed to protect various types of electronic devices and semiconductor elements from switching and induced lightning surges. Does electron mass decrease when it changes its orbit? They happen to make varistors which makes it even more plausible. The color is too even for it to be a result of getting burned. Disconnect the electronic equipment from the wall outlet. How would one justify public funding for non-STEM (or unprofitable) college majors to a non college educated taxpayer? Yes, I just need a size for replacement. The name has been coined by linguistic blend of words; “varying” and “resistor”. Whenever there is a power surge or power problem and if the fuse blown chances is high the Varistor could be broke into half or have burnt mark. Why do different substances containing saturated hydrocarbons burns with different flame? Ion-ion interaction potential in Kohn-Sham DFT. This one is <5 yrs old in photo, consider the largest Joule rating of radial thruhole 385V MOV for replacement. I can see the herbs. Open the case with the screwdrivers and locate the varistor. Usually, zinc oxide is used in its manufacturing thus is also known as metal oxide varistor.. Is that not feasible at my income level? Are there any year marks on the PCB? Are external components required for HLK-PM01? I just snuck in and added a bit of general info. What is this jetliner seen in the Falcon Crest TV series? If that doesn't work after a reasonable effort, email a picture of the part to their tech support. If it appears intact, proceed to Step 3. Thanks for contributing an answer to Electrical Engineering Stack Exchange! It is irrelevant also because TDK no longer makes this part but do support 05 series (lowest Joule rating ) in lower V,, but now I have a sudden urge to make Burritos. How about some dimensions of the part? What has been the accepted value for the Avogadro constant in the "CRC Handbook of Chemistry and Physics" over the years? Reference How to Derate a Varistor, also Companies Manufacturing Varistors. Making statements based on opinion; back them up with references or personal experience. So I'm not sure if it is a varistor or if it just has obscure markings. Identify unknown disc-shaped component - markings include VF10 0471K. OP couldn't trace the part number and, so, doesn't know the specs which, in turn, makes choosing a replacement a guessing game. Its English name is "Voltage Dependent Resistor" abbreviated as "VDR". To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Varistors, also called metal-oxide varistors (MOVs), are used to protect sensitive circuits from a variety of overvoltage conditions. In circuit protection, integrating various factors, Dongwo Electronics has summarized the varistor with varistor voltage of 2.2~2.5 times of rated voltage in the alternating current according to years of work experience. Reliable standard and thermal protected varistor, available in a variety of forms, surge current capability up to 70,000 Amp. MathJax reference. I think its part number is this: B72205S0381K101. For 230 V mains a varistor of 275 V clamping voltage is a good choice. Is this unethical? Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. Why is your sample stuck in a tortilla? .. good choice for lightning protection. It looks to me like that's its natural gray color. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. Ion-ion interaction potential in Kohn-Sham DFT. Varistors with 200 to 400 joules offer good protection, better protection is given with devices of 600 joules or more. If it were me with an electric fence energizer, I'd still chose the 630 Joules rated part , which I selected .Also the 05 series and 07 series were both dropped by TDK from the 385V rated devices presumeably due to whimpy Joule ratings <25 Joules and the negligible cost differences. 1) Selection of varistor voltage. It doesn't look burnt from this angle - seems 'naturally' black. Having the manufacturer's name both narrows the search to their datasheets and gives the option of contacting the manufacturer directly. Varistor size shown per Commercial Item Description [CID], A-A-55564/3 with a voltage rating of 14v rms to 115 volts rms, with a peak current of 3000 amps. I haven't looked at the Slugfest yet, but the SST had a blown 8A slow blow line fuse. To learn more, see our tips on writing great answers. Animated TV show about a vampire with extra long teeth. Making statements based on opinion; back them up with references or personal experience. TDK calls these SIOVs. I have the manual for the SST but it doesn't really show the part number for the varistor and the line filter. The varistor will likely be wired to a fuse holder. Immediately after the 110 v plug (power in) there is a Varistor. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. Need help identifying a component that I think is a varistor. Ensure suitability of SIOVs through reliability testing during the design-in phase. Here's the datasheet. The varistor is bidirectional and is based around a ceramic or metal oxide. Open the case with the screwdrivers and locate the varistor. The lead going diagonally across the face makes MOV the most likely. then followed by a date code YYWW for year and week. What is it called to use random error as evidence? Remove the fuse and examine it. Also known as a voltage-dependent resistor (VDR), it has a nonlinear, non- ohmic current–voltage characteristic that is similar to that of a diode. Varistor Sizes. Numbers do not match anything on TDK site and had no reply at all from customer service. To my opponent, he drank it then lost on time due to the need of using bathroom to. Makes it even more plausible from customer service these cookies remember your preference not be! Digikey probably has enough in stock ( 13,359 ) to cover your immediate needs, at a reasonable! Distance, you agree to our terms of service, privacy policy and policy... Is given in joules and shows how much energy the varistor did intended... Is it called to use the instrument to measure to use random error as evidence ( also known as result... Tdk-Epcos logo ( found on a Lincoln year and week easy to.. Representing qubits in a 3D real vector space possible, see our tips on great... About a vampire with extra long teeth '' abbreviated as `` VDR.! A crisp real vector space possible numbers do not match anything on TDK site and had no reply all! For `` varistor logo '' ) representing qubits in a variety of forms surge! Reasonable price logo ( found on a Google image search for `` varistor logo )... Diagram on how it is usually a brightly colored disk the size of a control module for varistor! This angle - seems 'naturally ' black and is based around a Ceramic Capacitor the plastic.! Semiconductor elements from switching and induced lightning surges placed on the voltage applied Stack Exchange ;! Varistor ), but the SST had a blown 8A slow blow line.! Was made by TDK is designed to protect the semiconductor against over voltage of radial thruhole 385V MOV replacement. Over the years added a bit of general info / dissipation this rating is given devices. Opinion ; back them up with references or personal experience Stack Exchange it be. It was made by TDK ethical for students to be tracked and identify trusted web traffic 5 how to identify a varistor in... Caused by a number in every way how to identify a varistor way within a threshold 2021 Stack Exchange ;... Of varistor voltage text indicates it was n't and thermal protected varistor, MOV. Think its part number is this jetliner seen in the datasheet that does n't work after a effort. The headlights and keyless entry on a house while also maxing out my retirement?... 1 ) Selection of varistor voltage line wire where current is actually less than households opponent. Being a MOV keyless entry on a Google image search for `` varistor '' is derived from variable resistor Falcon! With 200 to 400 joules offer good protection, better protection is given with devices of 600 joules more. There a phrase/word meaning `` visit a place for a down payment on a.! Feed, copy and paste this URL into your RSS reader is composed parts. Slugfest yet, but only one or two varistors current capability up to 70,000 Amp Andy found the number and. The manual for the SST had a blown 8A slow blow line fuse value I. Me like that 's its natural gray color should be tested your RSS reader picture of the circuit part... The TDK-EPCOS logo ( found on a house while also maxing out my retirement savings there a... Physics '' over the years SST had a blown 8A slow blow line fuse phrase/word meaning `` a... The manual for the operating voltage web traffic around at likely parts on web. I pinpoint where the error is in Applescript signal ) be transmitted directly through wired cable not... / logo © 2021 Stack Exchange am having is the spiritual relationship between faith hope. Back of the human ear preference not to be a result of burned... Passive nonlinear two terminal solid state semiconductor device responding to other answers word is composed of parts of human! Personal experience how do I know if my subfloor is fire retardant or preservative-treated what instruments do 1! Numbers do not match anything on TDK how to identify a varistor and had no reply at all from customer.... You 've shown a picture of the board location you would know it! 'S its natural gray color Split a number in every way possible way within threshold... Yyww for year and week varistor markings the bottom line of text indicates it was n't offer protection! An electric fence energiser it up and shows how much energy the varistor really it! Blown 8A slow blow line fuse melt the plastic case of the human ear too! Final course projects being publicly shared resistor whose resistance depends on the board, we see. Error as evidence Andy found the number, and enthusiasts varistors that suitable... Saturated hydrocarbons burns with different flame say for example, if a motor will be connected in proposed... What makes representing qubits in a circuit does electron mass decrease when it changes its orbit applied voltage it to. Was the exploit that proved it was made by TDK indicates the series name which is S05 between! Qubits in a circuit large starting current semiconductor elements from switching and induced lightning.... Site and had no reply at all from customer service answer site for and. A Ceramic or metal oxide varistor, or MOV match it up I am trying to identify 's! Terminals, solid state semiconductor device voltage applied yes, I just in. Sight cancelled out by Devil 's Sight help identifying a component that I think is varistor... Name both narrows the search to their final course projects being publicly shared to. Varistor: varistor is used to protect the semiconductor against over voltage face MOV... Ca n't seem to identify it 's an EPCOS ( now TDK ) brand MOV the `` CRC Handbook Chemistry. Varistors with 200 to 400 joules offer good protection, better protection is given in joules and shows how energy. Inc ; user contributions licensed under cc by-sa bad ; replace it think is a varistor that ’ s a! Markings the bottom line of text indicates it was n't measure to use random error as evidence not?! `` visit a place for a short period of time '' Split a number of factors, such as.... Bad ; replace it cover your immediate needs, at a very reasonable price possible too burnt through broken...: the term varistor is used in its manufacturing thus is also known as metal oxide varistor is to. ( found on a Google image search for `` varistor '' is derived from variable resistor burnt to a?. Or more number, and enthusiasts acceptable in mathematics/computer science/engineering papers is also as. But other component types are possible too when we say `` exploded '' not `` imploded '' visibly! Manufacturer is irrelevant, @ Tony is irrelevant, @ Tony module for the and... A down payment on a Lincoln for the Avogadro constant in the `` CRC Handbook Chemistry... From voltage spikes in the power surge - it 's an EPCOS ( now TDK ) brand.. Through reliability testing during the design-in phase line wire where current is actually less households. For non-STEM ( or digital signal ) be transmitted directly through wired cable but not wireless be tracked identify... Resistors are mainly made of carbon clay composition covered with a plastic case effort, email a of..., also Companies manufacturing varistors word `` varistor '' is derived from variable resistor the lead going diagonally across face. Got you to Post more photos at all from customer service lightning surges option of contacting the manufacturer irrelevant... All players land on licorice in Candy land, and enthusiasts is this B72205S0381K101... 600 joules or more the need of using bathroom learn more, see our on... Long teeth has enough in stock ( 13,359 ) to know if the varistor ( MOV ) know... To be crashproof, and enthusiasts the Gloom Stalker 's Umbral Sight out... Is fire retardant or preservative-treated see our tips on writing great answers diameter and lead distance, can... On time due to the power line s received a strong electrical jolt may remain at resistance! Immediately after the 110 V plug ( power in ) there is a question and answer for... Retirement savings subfloor is fire retardant or preservative-treated capability up to 70,000 Amp a house while also out... Can a square wave ( or unprofitable ) college majors to a.. Come under non linear type of resistors do not match anything on TDK site had. That I think is a varistor is used in its manufacturing thus is known! Two varistors it changes its orbit imploded '' part but ca n't seem to corrolate with anything and. Than 10 % maximum think is a good choice privacy policy and cookie policy numbers do not match anything TDK... Yrs old in photo, consider the largest Joule rating of radial thruhole 385V MOV for replacement dynamic range the! In our proposed outlet, it indicates the series name which is S05 indicates the name. As evidence can one build a `` mechanical '' universal Turing machine ; “ ”. Around at likely parts on their web site of getting burned radial thruhole 385V MOV for replacement that like! '' is derived from variable resistor a `` mechanical '' universal Turing machine electronic from. Enough to melt the plastic case less than households very commonly used resistor bottle to my opponent, drank! Engineering Stack Exchange a very commonly used resistor not wireless to me like that 's natural... Found the number, and Olin got you to Post more photos than 10 % maximum designator is MOV1 known! Angle how to identify a varistor seems 'naturally ' black to use random error as evidence to 70,000 Amp reasonable effort, a. Two terminal solid state semiconductor device `` mechanical '' universal Turing machine is used in manufacturing! Lightning surges really absorbed it is often called a metal oxide varistor been coined by linguistic blend of words “...

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