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# how to read varistor code

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Grab amazing varistor codes on alluring offers at Alibaba.com and redefine your entertainment experience. 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. Varistor Fire Safety Solutions specializes in a full range of services from the design, install and commissioning of fire protection systems, to testing and compliance in accordance with the relevant Indian legislation and building codes. Many varistors also have the voltage code prefaced by a size designation (in mm) such as 07, 10, 14, or 20. Real Time Availability. The basic electrical model for the varistor that could relate to all three regions of operation is shown in Fig. Metal Oxide Varistor B72225M ***M*** ThermoFuse Varistor MT25*** PPD VAR PD 2020-01-21 Please read Cautions and warnings and Page 2 of 12 Important notes at the end of this document. Metal Oxide Varistor B60K680 B60K680SIE SIEMENSOLB Epcos Metal Oxide Varistor from HAERF 565 at Heriot Watt University Dubai Keyword Suggestions. Explore more at Arrow.com Varistors are manufactured from a non-homogeneous material, giving a rectifying action at the contact points of two particles. 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 . Call us at +91-11-40703001 for free sample of report. varistor initially with the value of the operating current (here 1 A), then decaying towards zero fol-lowing an exponential function. Calculation examples Please read Important notes Page 2 of 7 and Cautions and warnings. 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. To find the varistor that meets your needs, start with Littelfuse. 2 11/07 Please read Cautions and warnings and Important notes at the end of this document. A 6.8 kV varistor would certainly be an uncommon find. Some such codes would make the conclusion obvious. If the file has been modified from its original state, some details may not fully reflect the modified file. 7D471K - Varistor MOV for 220V AC. Call us at +91-11-40703001 for free sample of report. Because of the small size of SMD resistors, there is often not room for the traditional color band code to be printed on them. In case of excessive voltage increases, their resistance drops dramatically. Due to updated CSA standard, the marking will be changed on EPCOS varistors and labels that are produced from October 1, 2019. The most common varistor is a metal oxide varistor … It has CY code and looks like a capacitor. Search Email. These types of varistors protect from heavy devices from transient voltages. filed at Indian customs. Fig. For this reason, varistors are also called Metal-Oxide Varistors (MOV). 3.1 A shows a typical V–I characteristic of an MOV. Product Code 4980 . What is this and which is the value of it? Willen Well-Known Member. If such a resistor is mounted with the marked side down, you cannot read its value unless you take it out of the circuit. When its value changes it then changes the amount of electricity it drops. This is the minimum voltage that would cause 1 mA to flow into the device. We operate in Mumbai, Bangalore, and Delhi. To determine the value of a given resistor look for the gold or silver tolerance band and rotate the resistor as in the photo on the left. China Metal Oxide Varistor varistor 14D560 14D560KJ 560KD14 560KD14J is supplied by Metal Oxide Varistor varistor manufacturers, producers, suppliers on Global Sources Available We dispatch same day if ordered by 1PM (excluding holidays), then courier usually takes 2-5 days. We are utilizing our experience, innovation, and technology to serve the best to our customers. varistor model curve gives the varistor transient current and the value of clamped peak transient voltage. In order to illustrate the three distinct regions of operation over a wide range of current, a log–log format is used. (Tolerance band on the right-hand end of the colors -- refer to the tolerance chart below for exact values). Metal Oxide Varistor LS40K680QP LS40K680QPSIE SIEMENSOLB Epcos Metal Oxide from HAERF 565 at Heriot Watt University Dubai 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. In contrast to a diode however, it has the same characteristic for both directions of traversing current. If the letter is p, n, or u, this tells you the units (pico-, nano-, or microfarad). Protect electronics against high voltage spikes and surges. Varistor; Usage on vi.wikibooks.org Biểu tượng điện tử ; Công thức điện tử; Quy ước điện tử; Metadata. Find out most authentic and trusted Varistor export data & price based on shipping bill no. A varistor is an electronic component with an electrical resistance that varies with the applied voltage. The ability of the varistor to limit the transient voltage is sometimes expressed in terms of a clamp ratio. 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. MENU MENU Alibaba.com. Their resistance decreases when the voltage increases. Resistor Color Code Calculator; Ohms Law Calculator; Circuit Design; PCB Design; Infographics; News; Varistor/Voltage Dependent Resistor Circuit with Working . Varistors are available for a broad range of specifications and are classified by maximum voltage, clamp voltage, peak current, surge energy and response time. Metal Oxide Varistor – Basics. The simplest ways of determining the current duration are simulation or measurement (τ= t*r). Not being able read marking of a part (update: Varistor) Thread starter Willen; Start date Feb 13, 2013; Status Not open for further replies. Just a note to let you know. The 'B' component used here to earth the ground plane. 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