SMD резисторы. Маркировка SMD резисторов, размеры, онлайн калькулятор

В общем, термин SMD (от англ. Surface Mounted Device) можно отнести к любому малогабаритному электронному компоненту, предназначенному для монтажа на поверхность платы по технологии SMT (технология поверхностного монтажа).

SMT технология (от англ. Surface Mount Technology) была разработана с целью удешевления производства, повышению эффективности изготовления печатных плат с использованием более мелких электронных компонентов: резисторов, конденсаторов, транзисторов и т. д. Сегодня рассмотрим один из таких видов резисторов  – SMD резистор.

SMD резисторы

SMD резисторы – это миниатюрные резисторы, предназначенные для поверхностного монтажа. SMD резисторы значительно меньше, чем их традиционный аналог. Они часто бывают квадратной, прямоугольной или овальной формы, с очень низким профилем.

Вместо проволочных выводов обычных резисторов, которые вставляются в отверстия печатной платы, у SMD резисторов имеются небольшие контакты, которые припаяны к поверхности корпуса резистора. Это избавляет от необходимости делать отверстия в печатной плате, и тем самым позволяет более эффективно использовать всю ее поверхность.

Типоразмеры SMD резисторов

В основном термин типоразмер включает в себя размер, форму и конфигурацию выводов (тип корпуса) какого-либо электронного компонента. Например, конфигурация обычной микросхемы, которая имеет плоский корпус с двусторонним расположением выводов (перпендикулярно плоскости основания), называется DIP.

Типоразмер SMD резисторов стандартизированы, и большинство производителей используют стандарт JEDEC. Размер SMD резисторов обозначается числовым кодом, например, 0603. Код содержит в себе информацию о длине и ширине резистора. Таким образом, в нашем примере код 0603 (в дюймах) длина корпуса составляет 0,060 дюйма, шириной 0,030 дюйма.

Органайзер для SMD компонентов

Отлично подходит для хранения 1206/0805/0603/0402/0201…

Паяльная станция Eruntop 8586D

Электрический паяльник + фен для SMD, двойной цифровой дисплей…

Набор SMD резисторов 1206

100 шт., 0R…10M 1/2 Вт, 0, 1, 10, 100, 150, 220, 330…

Профессиональный тестер SMD компонентов

Цифровой тестер проверки SMD резисторов, конденсаторов, диодов…

Такой же типоразмер резистора в метрической системе будет иметь код 1608 (в миллиметрах), соответственно длина равна 1,6 мм, ширина 0,8мм. Чтобы перевести размеры в миллиметры, достаточно размер в дюймах перемножить на 25,4.

Размеры SMD резисторов и их мощность

Размер резистора SMD зависит главным образом от необходимой мощности рассеивания. В следующей таблице перечислены размеры и технические характеристики наиболее часто используемых SMD резисторов.

Маркировка SMD резисторов

Из-за малого размера SMD резисторов, на них практически невозможно нанести традиционную цветовую маркировку резисторов.

В связи с этим был разработан особый способ маркировки. Наиболее часто встречающаяся маркировка содержит три или четыре цифры, либо  две цифры и букву, имеющая название EIA-96.

Маркировка с 3 и 4 цифрами

В этой системе первые две или три цифры обозначают численное значение сопротивления резистора, а последняя цифра показатель множителя. Эта последняя цифра указывает степень, в которую необходимо возвести 10, чтобы получить окончательный множитель.

Еще несколько примеров определения сопротивлений в рамках данной системы:

• 450 = 45 х 10⁰ равно 45 Ом
• 273 = 27 х 10³ равно 27000 Ом (27 кОм)
• 7992 = 799 х 10² равно 79900 Ом (79,9 кОм)
• 1733 = 173 х 10³ равно 173000 Ом (173 кОм)

 

Буква “R” используется для указания положения десятичной точки для значений сопротивления ниже 10 Ом. Таким образом, 0R5 = 0,5 Ом и 0R01 = 0,01 Ом.

Маркировка EIA-96

SMD резисторы повышенной точности (прецизионные)  в сочетании с малыми размерами, создали необходимость в новой, более компактной маркировке. В связи с этим был создан стандарт EIA-96. Данный стандарт предназначен для резисторов с допуском по сопротивлению в 1%.

Эта система маркировки состоит из трех элементов: две цифры указывают код номинала резистора, а следующая за ними буква определяет множитель. Две цифры представляют собой код, который дает трехзначное число сопротивления (см. табл.)

Например, код 04 означает 107 Ом, а 60 соответствует 412 Ом. Множитель дает конечное значение резистора, например:

• 01А = 100 Ом ±1%
• 38С = 24300 Ом ±1%
• 92Z = 0.887 Ом ±1%

Онлайн калькулятор SMD резисторов

Этот калькулятор поможет вам найти величину сопротивления SMD резисторов. Просто введите код, написанный на резисторе и его сопротивление отразится внизу.

Калькулятор может быть использован для определения сопротивления SMD резисторов, которые маркированы 3 или 4 цифрами, а так же по стандарту EIA-96 (2 цифры + буква).

Хотя мы сделали все возможное, чтобы проверить функцию данного калькулятора, мы не можем гарантировать, что он вычисляет правильные значения для всех резисторов, поскольку иногда производители могут использовать свои пользовательские коды.

Поэтому чтобы быть абсолютно уверенным в значении сопротивления, лучше всего дополнительно измерить сопротивление с помощью мультиметра.

90000 Resistor Calculator 90001 90002 The following are tools to calculate the ohm value and tolerance based on resistor color codes, the total resistance of a group of resistors in parallel or in series, and the resistance of a conductor based on size and conductivity. 90003 90004 Resistor color code calculator 90005 90002 Use this calculator to find out the ohm value and tolerance based on resistor color codes. 90003 90008 90009 90010 90011 90012 90011 90010 90015 90011 90017 90018 90004 Parallel resistor calculator 90005 Provide all of the resistance values ​​in parallel, separated by a comma «,» and click the «Calculate» button to determine total resistance.90004 90022 Resistors in series calculator 90005 Provide all of the resistance values ​​in series separated by a comma «,» and click the «Calculate» button to determine total resistance. 90004 90022 Resistance of a Conductor 90005 90002 Use the following to calculate the resistance of a conductor. This calculator assumes the conductor is round. 90003 RelatedOhms Law Calculator 90022 90030 Resistor Color Code 90031 90002 An electronic color code is a code that is used to specify the ratings of certain electrical components, such as the resistance in Ohms of a resistor.Electronic color codes are also used to rate capacitors, inductors, diodes, and other electronic components, but are most typically used for resistors. Only resistors are addressed by this calculator. 90003 90002 90035 How the color coding works: 90036 90003 90002 The color coding for resistors is an international standard that is defined in IEC 60062. The resistor color code shown in the table below involves various colors that represent significant figures, multiplier, tolerance, reliability, and temperature coefficient.Which of these the color refers to is dependent on the position of the color band on the resistor. In a typical four-band resistor, there is a spacing between the third and the fourth band to indicate how the resistor should be read (from left to right, with the lone band after the spacing being the right-most band). In the explanation below, a four-band resistor (the one specifically shown below) will be used. Other possible resistor variations will be described after. 90003 90040 90002 90035 Significant figure component: 90036 90003 90002 In a typical four-band resistor, the first and second bands represent significant figures.For this example, refer to the figure above with a green, red, blue, and gold band. Using the table provided below, the green band represents the number 5, and the red band is 2. 90003 90002 90035 Multiplier: 90036 90003 90002 The third, blue band, is the multiplier. Using the table, the multiplier is thus 1,000,000. This multiplier is multiplied by the significant figures determined from the previous bands, in this case 52, resulting in a value of 52,000,000 Ω, or 52 MΩ. 90003 90002 90035 Tolerance: 90036 90003 90002 The fourth band is not always present, but when it is, represents tolerance.This is a percentage by which the resistor value can vary. The gold band in this example indicates a tolerance of ± 5% which can be represented by the letter J. This means that the value 52 MΩ can vary by up to 5% in either direction, so the value of the resistor is 49.4 MΩ — 54.6 MΩ. 90003 90002 90035 Reliability, temperature coefficient, and other variations: 90036 90003 90002 Coded components have at least three bands: two significant figure bands and a multiplier, but there are other possible variations.For example, components that are made to military specifications are typically four-band resistors that may have a fifth band that indicates the reliability of the resistor in terms of failure rate percentage per 1000 hours of service. It is also possible to have a 5 90064 th 90065 band that is the temperature coefficient, which indicates the change in resistance of the component as a function of ambient temperature in terms of ppm / K. 90003 90002 More commonly, there are five-band resistors that are more precise due to a third significant figure band.This shifts the position of the multiplier and tolerance band into the 4 90064 th 90065 and 5 90064 th 90065 position as compared to a typical four-band resistor. 90003 90002 On the most precise of resistors, a 6 90064 th 90065 band may be present. The first three bands would be the significant figure bands, the 4 90064 th 90065 the multiplier, the 5 90064 th 90065 the tolerance, and the 6 90064 th 90065 could be either reliability or temperature coefficient. There are also other possible variations, but these are some of the more common configurations.90003 90002 90084 90003 90086 90087 90012 Color 90011 90012 1 90064 st 90065, 2 90064 nd 90065, 3 90064 rd 90065 90022 Band Significant Figures 90011 90012 Multiplier 90011 90012 Tolerance 90011 90012 Temperature Coefficient 90011 90017 90009 90107 90002 90003 Black 90011 90111 0 90011 90111 × 1 90011 90012 90011 90111 250 ppm / K (U) 90011 90017 90009 90107 90002 90003 Brown 90011 90111 1 90011 90111 × 10 90011 90012 ± 1% (F) 90011 90111 100 ppm / K (S) 90011 90017 90009 90107 90002 90003 Red 90011 90111 2 90011 90111 × 100 90011 90012 ± 2% (G) 90011 90111 50 ppm / K (R) 90011 90017 90009 90107 90002 90003 Orange 90011 90111 3 90011 90111 × 1K 90011 90012 ± 0.05% (W) 90011 90111 15 ppm / K (P) 90011 90017 90009 90107 90002 90003 Yellow 90011 90111 4 90011 90111 × 10K 90011 90012 ± 0.02% (P) 90011 90111 25 ppm / K (Q) 90011 90017 90009 90107 90002 90003 Green 90011 90111 5 90011 90111 × 100K 90011 90012 ± 0.5% (D) 90011 90111 20 ppm / K (Z) 90011 90017 90009 90107 90002 90003 Blue 90011 90111 6 90011 90111 × 1M 90011 90012 ± 0.25% (C) 90011 90111 10 ppm / K (Z) 90011 90017 90009 90107 90002 90003 Violet 90011 90111 7 90011 90111 × 10M 90011 90012 ± 0.1% (B) 90011 90111 5 ppm / K (M) 90011 90017 90009 90107 90002 90003 Grey 90011 90111 8 90011 90111 × 100M 90011 90012 ± 0.01% (L) 90011 90111 1 ppm / K (K) 90011 90017 90009 90107 90002 90003 White 90011 90111 9 90011 90111 × 1G 90011 90012 90011 90243 90017 90009 90107 90002 90003 Gold 90011 90012 90011 90111 × 0.1 90011 90012 ± 5% (J) 90011 90243 90017 90009 90107 90002 90003 Silver 90011 90012 90011 90111 × 0.01 90011 90012 ± 10% (K) 90011 90243 90017 90009 90107 90002 90003 None 90011 90012 90011 90012 90011 90012 ± 20% (M) 90011 90012 90011 90017 90018 90002 Resistors are circuit elements that impart electrical resistance.While circuits can be highly complicated, and there are many different ways in which resistors can be arranged in a circuit, resistors in complex circuits can typically be broken down and classified as being connected in series or in parallel. 90003 90030 Resistor in parallel: 90031 90290 90002 The total resistance of resistors in parallel is equal to the reciprocal of the sum of the reciprocals of each individual resistor. Refer to the equation below for clarification: 90003 90008 90009 90012 R 90296 total 90297 = 90011 90012 90008 90009 90302 1 90011 90017 90009 90306 90017 90009 90012 90011 90243 90012 + 90011 90243 90012 + 90011 90243 90012 +… + 90011 90243 90012 90011 90017 90018 90011 90017 90018 90022 90030 Resistor in series: 90031 90331 90002 The total resistance of resistors in parallel is simply the sum of the resistances of each resistor. Refer to the equation below for clarification: 90003 90002 R 90296 total 90297 = R 90296 1 90297 + R 90296 2 90297 + R 90296 3 90297 … + R 90296 n 90297 90003 90022 90030 Resistance of a conductor: 90031 90002 Where: 90022 L is the length of the conductor 90022 A is the cross-sectional area of ​​the conductor 90022 C is the conductivity of the material 90003 .90000 SMD resistor code calculator 90001 90002 SMD resistor code calculator 90003 90004 This simple calculator will help you determine the value of any SMD resistor. To get started, input the 3 or 4 digit code and hit the «Calculate» button or 90005 Enter 90006. 90007 90004 90009 Note: 90010 The program was tested rigorously, but it still may have a few bugs. So, when in doubt (and when it’s possible) do not hesitate to use a multimeter to double-check the critical components.90007 90004 See also the color code calculator on this page for MELF and standard through-hole resistors. 90007 90014 How to calculate the value of an SMD resistor 90015 90004 Most chip resistors are marked with a 3-digit or 4-digit code — the numerical equivalent of the familiar color code for through-hole components. Recently, a new coding system (the EIA-96) has appeared on precision SMDs. 90007 90018 The 3-digit code 90019 90004 Standard-tolerance SMD resistors are marked with a simple 90009 3-digit code 90010.The first two numbers will indicate the significant digits, and the third will be the multiplier, telling you the power of ten to which the two significant digits must be multiplied (or how many zeros to add). Resistances of less than 10 ohms do not have a multiplier, the letter ‘R’ is used instead to indicate the position of the decimal point. 90007 90004 3-digit code examples: 90007 90018 The 4-digit code 90019 90004 The 90009 4-digit code 90010 is used for marking precision surface mount resistors.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). Resistances of less than 100 ohms are marked with the help of the letter ‘R’, indicating the position of the decimal point. 90007 90004 4-digit code examples: 90007 90018 EIA-96 90019 90004 Recently, a new coding system (EIA-96) has appeared on 1% SMD resistors.It consists of a three character code: the first 2 numbers will tell us the 3 significant digits of the resistor value (see the lookup table below) and the third marking (a letter) will indicate the multiplier. 90007 90038 90039 90040 Code 90041 90040 Value 90041 90040 Code 90041 90040 Value 90041 90040 Code 90041 90040 Value 90041 90040 Code 90041 90040 Value 90041 90056 90039 90058 01 90059 90058 100 90059 90058 25 90059 90058 178 90059 90058 49 90059 90058 316 90059 90058 73 90059 90058 562 90059 90056 90039 90058 02 90059 90058 102 90059 90058 26 90059 90058 182 90059 90058 50 90059 90058 324 90059 90058 74 90059 90058 576 90059 90056 90039 90058 03 90059 90058 105 90059 90058 27 90059 90058 187 90059 90058 51 90059 90058 332 90059 90058 75 90059 90058 590 90059 90056 90039 90058 04 90059 90058 107 90059 90058 28 90059 90058 191 90059 90058 52 90059 90058 340 90059 90058 76 90059 90058 604 90059 90056 90039 90058 05 90059 90058 110 90059 90058 29 90059 90058 196 90059 90058 53 90059 90058 348 90059 90058 77 90059 90058 619 90059 90056 90039 90058 06 90059 90058 113 90059 90058 30 90059 90058 200 90059 90058 54 90059 90058 357 90059 90058 78 90059 90058 634 90059 90056 90039 90058 07 90059 90058 115 90059 90058 31 90059 90058 205 90059 90058 55 90059 90058 365 90059 90058 79 90059 90058 649 90059 90056 90039 90058 08 90059 90058 118 90059 90058 32 90059 90058 210 90059 90058 56 90059 90058 374 90059 90058 80 90059 90058 665 90059 90056 90039 90058 09 90059 90058 121 90059 90058 33 90059 90058 215 90059 90058 57 90059 90058 383 90059 90058 81 90059 90058 681 90059 90056 90039 90058 10 90059 90058 124 90059 90058 34 90059 90058 221 90059 90058 58 90059 90058 392 90059 90058 82 90059 90058 698 90059 90056 90039 90058 11 90059 90058 127 90059 90058 35 90059 90058 226 90059 90058 59 90059 90058 402 90059 90058 83 90059 90058 715 90059 90056 90039 90058 12 90059 90058 130 90059 90058 36 90059 90058 232 90059 90058 60 90059 90058 412 90059 90058 84 90059 90058 732 90059 90056 90039 90058 13 90059 90058 133 90059 90058 37 90059 90058 237 90059 90058 61 90059 90058 422 90059 90058 85 90059 90058 750 90059 90056 90039 90058 14 90059 90058 137 90059 90058 38 90059 90058 243 90059 90058 62 90059 90058 432 90059 90058 86 90059 90058 768 90059 90056 90039 90058 15 90059 90058 140 90059 90058 39 90059 90058 249 90059 90058 63 90059 90058 442 90059 90058 87 90059 90058 787 90059 90056 90039 90058 16 90059 90058 143 90059 90058 40 90059 90058 255 90059 90058 64 90059 90058 453 90059 90058 88 90059 90058 806 90059 90056 90039 90058 17 90059 90058 147 90059 90058 41 90059 90058 261 90059 90058 65 90059 90058 464 90059 90058 89 90059 90058 825 90059 90056 90039 90058 18 90059 90058 150 90059 90058 42 90059 90058 267 90059 90058 66 90059 90058 475 90059 90058 90 90059 90058 845 90059 90056 90039 90058 19 90059 90058 154 90059 90058 43 90059 90058 274 90059 90058 67 90059 90058 487 90059 90058 91 90059 90058 866 90059 90056 90039 90058 20 90059 90058 158 90059 90058 44 90059 90058 280 90059 90058 68 90059 90058 499 90059 90058 92 90059 90058 887 90059 90056 90039 90058 21 90059 90058 162 90059 90058 45 90059 90058 287 90059 90058 69 90059 90058 511 90059 90058 93 90059 90058 909 90059 90056 90039 90058 22 90059 90058 165 90059 90058 46 90059 90058 294 90059 90058 70 90059 90058 523 90059 90058 94 90059 90058 931 90059 90056 90039 90058 23 90059 90058 169 90059 90058 47 90059 90058 301 90059 90058 71 90059 90058 536 90059 90058 95 90059 90058 953 90059 90056 90039 90058 24 90059 90058 174 90059 90058 48 90059 90058 309 90059 90058 72 90059 90058 549 90059 90058 96 90059 90058 976 90059 90056 90489 90038 90039 90040 Code 90041 90040 Multiplier 90041 90056 90039 90058 Z 90059 90058 0.001 90059 90056 90039 90058 Y or R 90059 90058 0.01 90059 90056 90039 90058 X or S 90059 90058 0.1 90059 90056 90039 90058 A 90059 90058 1 90059 90056 90039 90058 B or H 90059 90058 10 90059 90056 90039 90058 C 90059 90058 100 90059 90056 90039 90058 D 90059 90058 1000 90059 90056 90039 90058 E 90059 90058 10000 90059 90056 90039 90058 F 90059 90058 100000 90059 90056 90489 90004 EIA-96 code examples: 90007 90004 01Y = 100 x 0.01 = 1Ω 90555 68X = 499 x 0.1 = 49.9Ω 90555 76X = 604 x 0.1 = 60.4Ω 90555 01A = 100 x 1 = 100Ω 90555 29B = 196 x 10 = 1.96kΩ 90555 01C = 100 x 100 = 10kΩ 90555 90007 90004 more EIA-96 SMD examples … 90007 90004 90007 90004 90009 Notes: 90010 90007 90570 90571 an SMD resistor with a marking of 0, 00, 000 or 0000 is a jumper (a zero-ohm link). 90572 90571 a chip resistor marked with the standard 3 digit code and a short bar below the marking denotes a precision (1% or less) resistor with a value taken from the E24 series (these values ​​are usually reserved for 5% resistors).For example: 1 90574 2 90575 2 = 1.2kΩ 1%. Some manufacturers underline all three digits — do not confuse this with the code used on low value current sensing resistors. 90572 90571 SMDs with values ​​in order of milliohms, made for current sensing applications are often marked with the help of the letters M, m or L, showing the decimal point location (with the value in milliohms). For example: 1M50 = 1.50mΩ, 2M2 = 2.2mΩ, 5L00 = 5mΩ. 90572 90571 Current sensing SMDs can also be marked with a long bar on top (1m5 = 1.5mΩ, R001 = 1mΩ, etc.) or a long bar under the code (90574 101 90575 = 0.101Ω, 90574 047 90575 = 0.047Ω). The underline is used when the starting ‘R’ has to be omitted due to the limited space on the resistor’s body. So, for example, R068 becomes 90574 068 90575 = 0.068Ω (68mΩ). 90572 90587 90014 Power rating 90015 90004 To find out the 90009 approximative power rating 90010 of your SMD resistor, measure its length and width. A few commonly used package dimensions with the corresponding typical power ratings are presented in the table below.Use this table as a guide only, and always consult the component’s datasheet for the exact value. 90007 90038 90039 90596 Package 90041 90598 Size in inches (LxW) 90041 90600 Size in mm (LxW) 90041 90602 Power rating 90041 90056 90039 90058 0201 90059 90058 0.024 «x 0.012» 90059 90058 0.6 mm x 0.3 mm 90059 90058 1 / 20W 90059 90056 90039 90058 0402 90059 90058 0.04 «x 0.02» 90059 90058 1.0 mm x 0.5 mm 90059 90058 1 / 16W 90059 90056 90039 90058 0603 90059 90058 0.063 «x 0.031» 90059 90058 1.6 mm x 0.8 mm 90059 90058 1 / 16W 90059 90056 90039 90058 0805 90059 90058 0.08 «x 0.05» 90059 90058 2.0 mm x 1.25 mm 90059 90058 1 / 10W 90059 90056 90039 90058 1206 90059 90058 0.126 «x 0.063» 90059 90058 3.2 mm x 1.6 mm 90059 90058 1 / 8W 90059 90056 90039 90058 1210 90059 90058 0.126 «x 0.10» 90059 90058 3.2 mm x 2.5 mm 90059 90058 1 / 4W 90059 90056 90039 90058 1812 90059 90058 0.18 «x 0.12» 90059 90058 4.5 mm x 3.2 mm 90059 90058 1 / 3W 90059 90056 90039 90058 2010 90059 90058 0.20 «x 0.10» 90059 90058 5.0 mm x 2.5 mm 90059 90058 1 / 2W 90059 90056 90039 90058 2512 90059 90058 0.25 «x 0.12» 90059 90058 6.35 mm x 3.2 mm 90059 90058 1W 90059 90056 90489 90014 Tolerance 90015 90004 The standard 3 and 4 digit code does not give us a way to determine the SMD resistor’s tolerance. 90007 90004 In most cases, however, you’ll find that a surface mount resistor marked with the 3-digit code has a tolerance of 5% and a resistor marked with 4-digit code or the new EIA-96 code has a tolerance of 1% or less.90007 90004 There are many exceptions to this rule, so always check the manufacturer’s datasheet, especially if the component’s tolerance is critical for your application. 90007 90004 90007 .90000 Resistor color code calculator — 3, 4 and 5 band resistors 90001 90002 Resistor color code calculator 90003 90004 The calculator above will display the 90005 value 90006, the 90005 tolerance 90006 and performs a simple check to verify if the calculated resistance matches one of the EIA standard values. Select the 90005 first 3 or 4 bands 90006 for 20%, 10% or 5% resistors and 90005 all 5 bands 90006 for precision (2% or less), 5-band resistors. Hover above the tolerance for min.and max. range values. 90013 90004 If you want to find out the color bands for a value, use the tool on the left. Enter the value, select the multiplier (Ω, K or M), the desired precision and hit ‘Display resistor’ or ENTER. You can also type in resistor values ​​in 90005 shorthand notation 90006 like 1k5, 4M7 or 100R. 90013 90004 90013 90020 Standard EIA Decade Resistor Values: 90021 90004 90023 E6 series: 90024 (20% tolerance) 90025 90005 10, 15, 22, 33, 47, 68 90006 90013 90004 90023 E12 series: 90024 (10% tolerance) 90025 90005 10, 12, 15, 18, 22, 27, 33, 39, 47, 56, 68, 82 90006 90013 90004 90023 E24 series: 90024 (5% tolerance) 90025 90005 10, 11, 12, 13, 15, 16, 18, 20, 22, 24, 27, 30, 33, 36, 39, 43, 47, 51, 56, 62, 68, 75, 82, 91 90006 90013 90004 90023 E48 series: 90024 (2% tolerance) 90025 90005 100, 105, 110, 115, 121, 127, 133, 140, 147, 154, 162, 169, 178, 187, 196, 205, 215, 226, 237, 249, 261, 274, 287, 301, 316, 332, 348, 365, 383, 402, 422, 442, 464, 487, 511, 536, 562, 590, 619, 649, 681, 715, 750, 787, 825, 866, 909, 953 90006 90013 90004 90023 E96 series: 90024 (1% tolerance) 90025 90005 100, 102, 105, 107, 110, 113, 115, 118, 121, 124, 127, 130, 133, 137, 140, 143, 147, 150, 154, 158, 162, 165, 169, 174, 178 , 182, 187, 191, 196, 200, 205, 210, 215, 221, 226, 232, 237, 243, 249, 255, 261, 267, 274, 280, 287, 294, 301, 309, 316, 324 , 332, 340, 348, 357, 365, 374, 383, 392, 402, 412, 422, 432, 442, 453, 464, 475, 487, 491, 511, 523, 536, 549, 562, 576, 590 , 604, 619, 634, 649, 665, 681, 698, 715, 732, 750, 768, 787, 806, 825, 845, 866, 887, 909, 931, 959, 976 90006 90013 90004 90023 E192 series: 90024 (0.5, 0.25, 0.1 and 0.05% tolerance) 90025 90005 100, 101, 102, 104, 105, 106, 107, 109, 110, 111, 113, 114, 115, 117, 118, 120, 121, 123, 124, 126, 127, 129, 130, 132, 133 , 135, 137, 138, 140, 142, 143, 145, 147, 149, 150, 152, 154, 156, 158, 160, 162, 164, 165, 167, 169, 172, 174, 176, 178, 180 , 182, 184, 187, 189, 191, 193, 196, 198, 200, 203, 205, 208, 210, 213, 215, 218, 221, 223, 226, 229, 232, 234, 237, 240, 243 , 246, 249, 252, 255, 258, 261, 264, 267, 271, 274, 277, 280, 284, 287, 291, 294, 298, 301, 305, 309, 312, 316, 320, 324, 328 , 332, 336, 340, 344, 348, 352, 357, 361, 365, 370, 374, 379, 383, 388, 392, 397, 402, 407, 412, 417, 422, 427, 432, 437, 442 , 448, 453, 459, 464, 470, 475, 481, 487, 493, 499, 505, 511, 517, 523, 530, 536, 542, 549, 556, 562, 569, 576, 583, 590, 597 , 604, 612, 619, 626, 634, 642, 649, 657, 665, 673, 681, 690, 698, 706, 715, 723, 732, 741, 750, 759, 768, 777, 787, 796, 806 , 816, 825, 835, 845, 856, 866, 876, 887, 898, 909, 920, 931, 942, 953, 965, 976, 988 90006 90013 90025 90065 FAQs 90066 90020 I have a 6-band resistor.How can I calculate its value? 90021 90004 Enter the first five colors. Resistors with 6 bands are basically 5-band resistors with an additional ring indicating the 90005 reliability 90006 or the 90005 temperature coefficient 90006. 90013 90020 The resistor has only 3 bands 90021 90004 You do not have to enter the 4th band, as 20% resistors do not have a tolerance ring. They will be calculated using the 4 band rule (digit, digit, multiplier). 90013 90004 Examples: 90025 Red, red, brown is a 220 ohm, 20% resistor 90025 Brown, black, orange is a 10k, 20% resistor 90013 90020 Which band is the first? 90021 90004 The short answer: you’ll know that from experience! But there are some rules you can follow: 90025 90013 90004 1.) Some resistors have the color bands grouped together and / or close to one end. Hold the resistor with the closely grouped bands to your left and read the resistor from the left to the right. 90013 90004 2.) With 5% and 10% resistors the procedure is simple: hold the resistor with the silver or gold band to the right and read the resistor from the left to the right. 90013 90004 3.) The first band can not be silver or gold, so if you hold such a resistor you’ll know instantly where to start.Also, the 3rd color for 4-band resistors will be blue (10 90093 6 90094) or less and the 4th color for 5 band resistors will be green (10 90093 5 90094) or less, as basic resistor values ​​range from 0.1 Ohm to 10 Mohms. 90013 90020 What happens, if I start reading from the wrong end? 90021 90004 You should always attempt to work out the value, then check your result against a resistor value chart to see if it’s listed there. If it is not, then try reading it again starting from the other end and check again.This is a necessary step especially with five and six banded metal film resistors. 90013 90004 Our color code calculator runs this check automatically for you, and if the result is not a standard value, it will display a small tip. The warnings are there for your information only and do not always imply that the resistor is was read the wrong way — see the notes below. 90013 90025 90020 Notes 90021 90004 1.) The resistor color code and the EIA preferred values ​​are internationally accepted standards, but some manufacturers have their own way of doing things.For example, many resistor manufacturers make every single value on the E24 list in 1% and 2% tolerance even though the practice makes little mathematical sense. 90013 90004 2.) Although the program was tested rigorously, it still may have a few bugs. Therefore, when in doubt (and when it’s possible) do not hesitate to use your trusted, old friend — the multimeter — to double-check the critical components. 90013 90025 90020 Examples 90021 90114 3 bands: 90115 90004 Yellow, violet, black -> 47 ohm 20% 90013 90004 Orange, orange, brown -> 330 ohm 20% 90013 90004 Brown, black, red -> 1k 20% 90013 90114 4 bands: 90115 90004 Green, blue, red, gold -> 5.6kohm 5% 90013 90004 Red, yellow, orange, gold -> 24kohm 5% 90013 90004 Blue, gray, yellow, silver -> 680k 10% 90013 90004 More 4 band resistor color code examples: E12 and E24 series. 90013 90114 5 bands: 90115 90004 Red, yellow, orange, black, brown -> 243 ohms, 1% precision 5-band resistor 90013 90004 Yellow, violet, gold, gold, yellow -> 4.7 ohms, 5% — this resistor is calculated with the 4-band rule (the yellow band is ignored).90013 90004 Orange, black, black, brown, brown -> 3.00 k ohms, 1% — note: this is a non-standard 1% (E96) resistor, but some manufacturers make every value from the E24 series with 1% tolerance! 90013 90004 More: 5 band E48 (2%) series resistor color code examples. 90013 90114 6 bands: 90115 90004 Red, red, brown, brown, brown, red -> 2.21k, 1% 50ppm / ° C 90013 90004 White, black, white, brown, red, red -> 9.09k, 2% 50ppm / ° C 90013 90004 — do not enter the last band (red in the two examples above) 90025 90013 90004 90013 90004 90013 90004 90005 Hobby Electronics -> Resistor color code table -> Resistor color code calculator 90006 90013 .90000 LED Series Resistor Calculator 90001 90002 LED Series Resistor Calculator 90003 90004 All LEDs require some form of 90005 current limiting 90006. Connecting an LED directly to the power supply will burn it out in a heartbeat. Overdriving, even briefly, will significantly reduce it’s life and light output. 90007 90004 Fortunately, driving a single or a string of low current (20-30 mA) LEDs is a simple task — adding a small 90005 resistor in series 90006 is the easiest and cheapest way to limit the current.Keep in mind however, that high current (above a few hundreds of mA) LEDs are tougher to drive, and while they can be operated with a series resistor, to minimize power loss and ensure reliability, it’s advisable to use a more expensive 90011 switching current regulator 90012. 90007 90004 Our 90005 LED calculator 90006 will help you determine the value of the current limiting series resistor when driving a single or an array of low-current LEDs. To get started, input the required values ​​and hit the «Calculate» button.90007 90004 The program will draw a small schematic, display the calculated resistance and will tell you the value and color code of the nearest lower and higher standard resistor. It will calculate the power dissipated by the resistor and LED (s), the recommended resistor Wattage, the total power consumed by the circuit and the efficiency of the design (Power consumed by the LED (s) / Total circuit power consumption) x 100 ). 90007 90020 Input fields 90021 90004 90005 Supply voltage 90006: Type in a voltage greater than the LED voltage drop for a single LED circuit and parallel connection or the sum of all voltage drops when connecting multiple LEDs in series.90007 90004 90005 LED current 90006: Type in the single LED current in milliamperes. Common 3 mm and 5 mm LEDs usually operate in the range of 10-30 milliamps, but power LEDs used in lighting and automotive applications can have current requirements above 200 mA. A current of 20 mA is usually a safe value if you do not have access to the component’s datasheet. 90007 90004 90005 LED color 90006 and 90005 Voltage drop 90006: Select the color of your LED. The 90011 voltage drop 90012 box will auto-fill with the typical value for the selected color (e.g. 2V for a standard red LED; 3.6V for a white LED used in lighting, stroboscope, etc .; 1.7V for an infrared LED used in remote controls, etc.). However, the voltage drop varies greatly between different types of LEDs and also changes slightly with the current, so please change it if you know the correct value for your component. 90007 90004 90005 Number of LEDs 90006: Select the number of LEDs you want to use in your circuit. For multiple LEDs a second drop-down will appear where you can select either a 90005 series or parallel 90006 connection.90007 90004 Note: You should avoid connecting LEDs in parallel with just one resistor shared between them. Identical LEDs can be successfully connected in parallel, but each LED may have a slightly different voltage drop, and the brightness of the LEDs will differ. If you want to connect the LEDs in parallel each one should have its own resistor. Calculate the value for a single LED and connect all the LED-resistor pairs in parallel. 90007 90004 90005 Resistor precision 90006: select the desired standard resistor precision: 10% (E12), 5% (E24), 2% (E48) or 1% (E96).Use our resistor color code calculator to find out the color bands for different (20%, 0.5% …) precision resistors. 90007 90020 How to interpret the results 90021 90004 A simple 90005 schematic 90006 is generated with every pageload. Only the nearest standard resistor’s value is shown on the diagram and only two LED connections are drawn regardless of how many LEDs are in the circuit (but I’m sure you can easily fill in the missing bits). 90007 90004 There are 90005 two resistors 90006 shown on the right.They are the nearest (upper and lower) standard values ​​closest to the raw calculated resistance. You have to use only one in your circuit — it’s best to select the one which is closer (the one with * after the value). 90007 90004 The 90005 recommended resistor Wattage 90006 is calculated with a small safety margin, so that the dissipated power stays within 60% of the rated value. 90007 90004 The 90005 efficiency 90006 [%] will show you how much of the total power consumed by the circuit is actually used by the LED (s).90007 90020 How to identify the leads of an LED 90021 90004 An LED has two leads: a positive (anode) and a negative (cathode). On schematic diagrams, its symbol is similar to the simple diode, with two arrows pointing outwards. The anode (+) is marked with a triangle and the cathode (-) with a line. Sometimes you’ll find additional labels: A or + for anode and K or 90005 — 90006 for cathode. 90007 90004 There are several ways to identify the leads of an LED: 90007 90076 90077 The cathode (negative) is usually marked with a 90011 flattened edge 90012 on the bottom of the LED’s body.90080 90077 Most LEDs are manufactured with one longer leg, indicating the positive (anode). 90080 90077 Take a look inside the LED itself — the smaller metal piece inside the LED connects to the positive electrode and the bigger one connects to the negative electrode. 90080 90085 90004 90007 .