A varistor that is made with a combination of zinc oxide & other kinds of metal oxides such as manganese, cobalt, etc is known as metal oxide varistor. Electrical specifications and ordering codes Maximum ratings (TA = 85 °C) Ordering code Type SIOV-VRMS V VDC V imax (8/20 µs) A Wmax (2 ms) J Pmax W VRMS = 75 V B72240B0750K001 B40K75 75 100 25000 190 1.4 VRMS = 130 V B72232B0131K001 B32K130 130 … Keyword Suggestions. Just a note to let you know. We operate in Mumbai, Bangalore, and Delhi. (Tolerance band on the right-hand end of the colors -- refer to the tolerance chart below for exact values). Browse a selection of varistors, including the metal oxide varistor, today. The basic electrical model for the varistor that could relate to all three regions of operation is shown in Fig. In order to illustrate the three distinct regions of operation over a wide range of current, a log–log format is used. It has CY code and looks like a capacitor. Bing; Yahoo; Google; Amazone ; Wiki; How to read varistor codes. This results in a longer code format that's uncommon in capacitor markings. If this were a varistor, this would be the nominal varistor voltage at 1mA. The word is composed of parts of the words “variable resistor”. If such a resistor is mounted with the marked side down, you cannot read its value unless you take it out of the circuit. This behavior makes them suitable to protect circuits during voltage surges. Not being able read marking of a part (update: Varistor) Thread starter Willen; Start date Feb 13, 2013; Status Not open for further replies. filed at Indian customs. Read codes that contain letters instead. This is the minimum voltage that would cause 1 mA to flow into the device. Ordering code Marking on varistor Marking on label Joined Jul 18, 2013 21,342. But, you could get a device with the same marking that only draws 1 mA at a voltage of 473 volts (22% higher). Therefore, new resistor SMD codes were developed. If the letter is p, n, or u, this tells you the units (pico-, nano-, or microfarad). When the voltage applied to the varistor is lower than its threshold value, the current flowing through it is extremely small, which is equivalent to a resistor with infinite resistance, vice versa. Varistor; Usage on vi.wikibooks.org Biểu tượng điện tử ; Công thức điện tử; Quy ước điện tử; Metadata. Now that you know how to read a resistor’s estimated values and potential values, let's take a look at how to check for a bad resistor. A varistor is a device with a non-linear volt-ampere characteristic. Varistors, also called metal-oxide varistors (MOVs), are used to protect sensitive circuits from a variety of overvoltage conditions. Resistor Color Code Calculator; Ohms Law Calculator; Circuit Design; PCB Design; Infographics; News; Varistor/Voltage Dependent Resistor Circuit with Working . Show Prices in USD $Quantity: Price: Rs.5.31/-Minimum: 9 Buy Now! 7D471K - Varistor MOV for 220V AC. Because of the small size of SMD resistors, there is often not room for the traditional color band code to be printed on them. SIOV metal oxide varistors Leaded varistors, StandarD series Series/Type: S05, S07, S10, S14, S20 Date: December 2007. In case of excessive voltage increases, their resistance drops dramatically. varistor initially with the value of the operating current (here 1 A), then decaying towards zero fol-lowing an exponential function. A 6.8 kV varistor would certainly be an uncommon find. The most commonly seen codes are the three and four digit system and an Electronic Industries Alliance (EIA) system called EIA-96. 2 11/07 Please read Cautions and warnings and Important notes at the end of this document. To find the varistor that meets your needs, start with Littelfuse. The material is arranged between two metal plates or electrodes to interact with each other. For example, consider a varistor applied to protect the power terminals of electrical equipment. For example, 4R1 means a capacitance of 4.1pF. The V275LA20AP varistor is specified for up to 275 volts RMS and the data sheets ties this in nicely when multiplying 275 volts by approximately \$\sqrt2\$to get 287 volts. Protect electronics against high voltage spikes and surges. Grab amazing varistor codes on alluring offers at Alibaba.com and redefine your entertainment experience. Arrow.com is an authorized distributor of Walsin Technology, stocking a wide selection of electronic components and supporting hundreds of reference designs. Related Searches for varistor codes: coding machinery qr code reader steam wallet code … Varistor Fire Safety Solutions specializes in a full range of services from the design, installation, and commissioning of fire protection systems, to testing and compliance in accordance with the relevant Indian legislation and building codes. Metal Oxide Varistor B60K680 B60K680SIE SIEMENSOLB Epcos Metal Oxide Varistor from HAERF 565 at Heriot Watt University Dubai English Sourcing Solutions Services & Membership Help & Community Ready to Ship Trade Shows Get the App Products. Available We dispatch same day if ordered by 1PM (excluding holidays), then courier usually takes 2-5 days. 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. Their resistance decreases when the voltage increases. Varistor Ordering code: B722(top right header bar) 25M ***M*** Series/Type: (bottom right header bar) MT25*** Preliminary data (optional): Department: PPD VAR PD Date: 20 -01 21 Version: b . Real Time Availability. Thermal Protective Varistor Ordering code: (top right header bar) B72230M ***M401 Series/Type: (bottom right header bar) MT30*** Preliminary data (optional): Department: PPD VAR PD Date: 20 -01 10 Version: b . varistor model curve gives the varistor transient current and the value of clamped peak transient voltage. If the file has been modified from its original state, some details may not fully reflect the modified file. 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 energy. How to read varistor codes keyword after analyzing the system lists the list of keywords related and the list of websites with related content, in addition you can see which keywords most interested customers on the this website. Feb 13, 2013 #1 The 'A' component used instead of two parallel zenere diode. For this reason, varistors are also called Metal-Oxide Varistors (MOV). 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