Professional high voltage thin film melf resistors mma 0204 hv and mmb 0207 hv professional thin film melf resistors are the perfect choice for most fields of modern professional electronics where reliability and stability is of major concern. Metal electrode leadless face melf is a type of leadless cylindrical electronic surface mount device that is metallized at its ends. Download resistor color code calculator 4, 5 and 6 band. Vishay has developed software support tools, and technical content to assist design engineers. Download book 50 555 circuits by talkingelectronics. Resistor color code calculator and chart 4band, 5band or 6. In both of these calculations, the color code scheme is applicable for 4, 5, and 6 band resistors. Resistor calculator is an application that calculates the resistance value by selecting the color codes on the resistor. Resistor color code calculator the calculator above will display the value, the tolerance and performs a simple check to verify if the calculated resistance matches one of the eia standard values. Resistors used in modern electronics often experience transients e. High voltage melf resistor performance specifications characteristics test conditions limits short time overload iec 601151 4. Both ends of the core are plated with precious metal to ensure low noise and small temperature coefficient. Download this app from microsoft store for windows 10 mobile, windows phone 8. Melf construction melf resistors consist of a homogeneous film of metal alloy deposited on a highgrade ceramic body.
Resistor color code calculator decodes value and tolerance of 4 and 5 band resistors. Melf resistors 0102 e24 series 1% and 5% 3d cad model. The terminals on melf resistors are forcefitted steel caps with sn plated termination. The admin of this site has disabled the download button for this page. Land pattern sizes for melf resistors are the same as smd chip resistor. Excluding national holidays more stock available week commencing 72020. A wide variety of melf resistor options are available to you, there are,543 suppliers who sells melf resistor on, mainly located in asia. Resistor color code calculator 3, 4 and 5 band resistors hobby hour. Online electrical calculator to determine the resistance of three band resistors. Where applications require even tighter tolerance, token offer ultra precision range in the rjm package, with values from 0. To use this tool, simply click on a particular color and number and watch how the actual bands on the resistor illustration change. Resistive products melf resistors the worlds most reliable.
Files 9 melf resistors 0102 e24 series 1% and 5% melf resistors 0102 e24 series 1% and 5% loading. Metal electrode leadless face melf resistors dummy. Resistor colour code solver is a featured resistor value calculator which offers both color code to value and value to color code conversions. Both of these conversions are available for 4 band, 5 band, and 6 band resistors. The main advantage of using melf in stead of standard smd packages is the lower thermal coefficient and better stability. Mmb02070c1002fb200 vishay surface mount melf resistor. This application note is intended to guide designers in selecting the optimum resistor by identifying the pulse properties power, duration, and shape that need to be considered. The en 140401803 and do2 standards describe multiple melf components. Production of the cmb 0207 specialty melf resistor is strictly controlled and follows an extensive set of instructions established for reproducibility. Tt electronics is a manufacturer of a range of resistors, including wrm0204.
Melf resistors metal film resistor melf 120r 207 1w. The program was tested rigorously, but it still may have a few bugs. Carbon film melf resistors for engineers only vishay digikey. The resistor color code calculator decodes and identifies a value and tolerance of 5 band wire wound resistors. Download entire melf resistor catalogue in pdf file 579kb. The 1w melf package is obviously useful for dissipation reasons. Melf, resistors, fixed manufactured by vishay, a global leader for semiconductors and passive electronic components. This simple calculator will help you determine the value of any smd resistor. Download book 200 transistor circuits talking electronics. Fusible resistor contain both functions, as being resistor in normal condition and changed into fuse while abnormal current comes in to protect machine and equipment. The challenge is to cram more powerhandling capability into eversmaller spaces, making the resistor s powerhandling ability a key datasheet quantity, not only in terms of dc and rms dissipation, but also regarding a devices ability to. Our resistor color code calculator is a handy tool for reading carboncomposition resistors whether its a 4band, 5band or 6band type.
The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Metal film melf resistor mm102melf 0102 resistors the worlds most reliable and smallest, highperforming thinfilm resistors. Software that calculates the resistor value and its power consumption in different leds circuit configurations simple, series o parallel according to the source voltage, the leds voltage and the wanted current value. The top countries of suppliers are japan, china, and taiwan, china, from which the percentage of melf resistor supply is 1%, 99%, and 1% respectively. Vishay melf resistors offer superior smd resistor performance in terms of accuracy, stability, reliability, and pulse load capability. To download the online resistors color code script for offline use on pc, iphone or android, ask for price. Carbon film melf pulse load champion eeweb community. Resistor color code calculator 3, 4 and 5 band resistors. Melf resistors are available at mouser electronics. Is 26 years experienced professional manufacturer of high precision resistors, high precision resistor networks, high precision melf resistors and lot of special resistors in china the quality of the products is always the first priority in thunder precision resistors and that is our quality policy. This tool is used to decode information for color banded axial lead resistors.
Melf and leaded resistor products e24 series melf and leaded resistor products e96 series and e192 series band 2 coding band 1 coding band 3 coding band 4 coding band 5 coding tc dots near band 4 or 6 tc 1001 tc 501 tc 15 tc 25 tc 05 tc 10 5 % 1 % 2 % 0. Calculate resistor color codes with this handy reference app. The cylindrical construction of melf devices provides an optimal power rating and pulse load capability related to the mounting space. Three 3 band resistor resistance color code calculator. The app is useful for every maker, engineer, student and arduino or raspberry pi tinkerer when. The value for the selected band is expressed in terms of ohms. The resistors are insulated with layers of lacquer. The wmf melf series metal film melf resistors are manufactured using the latest magnetron vacuum sputtering system. Nowadays the most used are the rectangular surface mount resistors, but also the good old axial resistor is still used extensively in through hole designs. Our products can be used in a wide variety of industries. Melf, minimelf, micromelf the two latter are in the powerrating range of 06030805 resistors.
You can calculate the value of an unknown resistor with this program. To get started, input the 3 or 4 digit code and hit the calculate button or enter note. Download resistor calculator for leds serial and parallel 2. Instead of using advanced javascript functions that would make the script incompatible with older browsers, i elected to leave the quantization errors. The ability of melf resistors to handle pulse loads beyond 8,000 w is one reason for their popularity. Metal film resistor are made by depositing special treated metal film onto ceramic core in ultra high vacuum. Melf 0102 resistors the worlds most reliable and smallest, highperforming thinfilm resistors. Melf resistors and pulseload handling electronic products. To calculate the failure rate and mtbf of a resistor using the milhdbk217f failure model, thermistor or variable resistor, enter its parameters in the following table.
Surge resistant melf resistor performance specifications test characteristics test conditions limits short time overload iec 601151 4. Resistor color code calculator calculate 4 and 5 band resistors. Nickelplated steel termination caps are pressed on the metalized rods, before a special laser cuts a helical grove in the resistive layer to achieve the target resistance value. There are some similarities between resistor and fuses in material and structure. Vishays carbon film melf resistors are the perfect circuit protection choice with. Sometimes surface mount resistors are also used as melf packages metal electrode leadless face. Resistor color code calculator for 3456 band online software tool. The wmf melf series resistors are suitable for surface mount technologies. Use this website to convert resistor color codes into resistor ohm value and tolerance. So, when in doubt and when its possible dont hesitate to use a multimeter to doublecheck the critical components. Melf 0102 melf resistors, 1 w 360 ohms melf resistors, 20 kohms 0.
Dec 30, 2015 there are three types of resistor color coding. All are shown in the same screen in order to make direct comparisons on values. Since two functions performed by one resistor, the cost therefore saved. The typical applications in the fields of automotive, telecommunication and medical equipment reflect the outstanding level of proven reliability. Melf resistors smd, size 0102, with color coding, e24 series, with. Surge stress test of 0204 melf resistor and 1206 chip resistor test condition. They are available in embossed plastic tape on 7 reels. Select the first 3 or 4 bands for 20%, 10% or 5% resistors and all 5 bands for precision 2% or less, 5band resistors. Quantization errors in resistor values are inherent to javascript. Just copy and paste the below code to your webpage where.
An increased surface area is made available for the resistive element, which far exceeds conventional chip resistors. Metal electrode leadless face melf resistors dummy components. These can include 3d models, custom calculators, and demonstration videos which are available by product category. For this, the effects of pulses on resistors, the factors determining their pulse load capability, and the resulting advantages of carbon film melf resistors are. The challenge is to cram more powerhandling capability into eversmaller spaces, making the resistors powerhandling ability a key datasheet quantity, not only in terms of dc and rms dissipation, but also regarding a devices ability to. Download calculator for parabolic satellite dish antenna design. Metal electrode leadless face melf resistors are round or cylindrical in shape. The main feature is the surface area to cost ratio, this is a result of the cylindrical shape. F notice 2 learn about environmental test chambers. Sep 14, 2018 download resistor calculator a practical, effective and useful application that helps you to determine the color code of a resistor and calculate resistors for led circuits. They have different numbers of color bands and hence provide different information. Melf resistors metal film resistor melf 100r 204 0.
Melf devices are usually diodes and resistors the en 140401803 and do2 standards describe multiple melf components melf mmb 0207 l. Bsi issued iso9000 quality management certificate to thunder precision resistor co. Simply put, a melf resistor is a cylindrical resistor for use with smt equipment, so why is it as popular as ever. The typical applications in the fields of lighting and medical equipment reflect the. This page will inform you about the dimensions of smd, axial and melf packages and about the. A homogeneous and dense carbon film is deposi ted on a high grade ceramic body al2o3. Select the number of bands, then their colors to determine the value and tolerance of the resistors or view all resistors digikey has to offer. Melf 0207 melf resistors, 27 kohms melf 0207 melf resistors, 400 mw 0. The calculator above will display the value, the tolerance and performs a simple check to verify if the calculated resistance matches one of the eia standard.