Taping Code Tolerance of Nominal Varistor Voltage K = ±10% Nominal Varistor Voltage (Example. The capacitor on the left is of a ceramic disc type capacitor that has the code 473J printed onto its body. The Resistor Colour Code system is all well and good but we need to understand how to apply it in order to get the correct value of the resistor. The process of fabricating a Littelfuse Varistor is illustrated in the ﬂow chart of Figure 7. Metal-oxide varistors (MOVs) are available in a variety of form factors and sizes for a broad range of applications. Metal-Oxide Varistors (MOVs) Radial Lead Varistors > LA Varistor Series Part Number Branding Model Size Disc Dia. Varistor Voltage Temp. 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.In contrast to a diode however, it has the same characteristic for both directions of traversing current. An MOV is a Metal Oxide Varistor. The 4-digit code. The radial leaded disc type is the most common version. The 4-digit code is used for marking precision surface mount resistors. Varistors are voltage dependent, nonlinear devices which have an electrical behavior similar to back-to-back Zener diodes. Feel free to make use of our favorite Resistor Color Code Guide, available below. You can use the number of bands and the colors along with the charts below to determine the value and tolerance of the resistors. The “left-hand” or the most significant coloured band is the band which is nearest to a connecting lead with the colour coded bands being read from left-to-right as follows: . Please check on google You can try PF7004, MP352, MP502, PF7000, BYP60A6 A varistor is an electronic component with an electrical resistance that varies with the applied voltage. 07D180K: D73ZOV110RA01: V18ZA1 ERZV07D180: S07K11 22; 07D220K D73ZOV140RA01; Withstanding Surge Current The maximum current within the varistor voltage change of ±10% with the standard impulse current (8/20μs) applied one time. It's similar to the previous system, the only difference is the number of significant digits: the first three numbers will tell us the significant digits, and the fourth will be the multiplier, indicating the power of ten to which the three significant digits must be multiplied (or how many zeros to add). Calculating Resistor Values. Topdiode VAR Series MAIDA Littelfuse/Harris PANASONIC(ZNR) Epcos(SIOV) 18. The starting material may differ in the composition of the additive oxides, in order to cover the voltage range of product. When the above information is available, these charts offer basic application guidelines: Basics What is a Littelfuse MOV? Then the 4 = 1 st digit, the 7 = 2 nd digit, the 3 is the multiplier in pico-Farads, pF and the letter J is the tolerance and this translates to: 47pF * 1,000 (3 zero’s) = 47,000 pF, 47nF or 0.047uF the J indicates a tolerance of +/- 5%. You can use also V420k10 or V420K14(Vrms=420). (Taping code is to be added at the end of model number.) I have no more idea about this type of diode. Metal Oxide Varistors (MOV) Part Number Cross Reference Guide 5mm Series Tel/Fax: +86 (0)769 82827329 Skype: topdiode Email: info@topdiode.com Website: www.topdiode.com. Multilayer Varistors The maximum energy within the varistor voltage change of ±10% when one impulse of 10/1000μs or 2ms is applied. ... Varistor–non-linear component where resistance changes with applied voltage. You can use Varistors V350K14 or V350K20 these have approximately the same current and Vrms parameter. 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