11/10/2022 0 Comments Resistor color code![]() By matching the colour of the first band with its associated number in the digit column of the colour chart below the first digit is identified and this represents the first digit of the resistance value. Resistor color code code#The resistor colour code markings are always read one band at a time starting from the left to the right, with the larger width tolerance band oriented to the right side indicating its tolerance. ![]() It consists of a set of individual coloured rings or bands in spectral order representing each digit of the resistors value. These coloured painted bands produce a system of identification generally known as a Resistors Colour Code.Īn international and universally accepted resistor colour code scheme was developed many years ago as a simple and quick way of identifying a resistors ohmic value no matter what its size or condition. In this case, the value of Orange is 1000 or 1k, so the resistance value of the resistor is 47,000 ohms (47×1000 47000) or 47k. Who invented the resistor colour code The colour code was developed in the 1920s by the Radio Manufacturers Association (RMA). The 1000 resistor has a mulitplying factor of 100 (Red) and a tolerance level of 5 (Gold). Multiply the value of the third band value. A 1000 resistor has a four-band colour code following a colour sequence of Brown, Black, Red and Gold. The second color band (purple) gives the second digital value 7. ![]() So to overcome this, small resistors use coloured painted bands to indicate both their resistive value and their tolerance with the physical size of the resistor indicating its wattage rating. The first color band (yellow) gives the first digital value of 4. But when the resistor is small such as a 1/4 watt carbon or film type, these specifications must be shown in some other manner as the print would be too small to read. The standard E3, E6, E12, E24, E48 and E96 resistor values are listed below.The resistance value, tolerance, and wattage rating are generally printed onto the body of the resistor as numbers or letters when the resistors body is big enough to read the print, such as large power resistors. Resistor color code series#Standard Resistor Value Series and Tolerances But in order to do this the actual resistor needs to have some form of resistive or. There are many different types of Resistor available which can be used in both electrical and electronic circuits to control the flow of current or to produce a voltage drop in many different ways. Resistors produced by different manufacturers are compatible for the same designs because of the use of standard values. Resistor color codes Resistor color codes. This helps the supplier with stocking different values. The purpose of this was so that when companies produce resistors with different values of resistance, they would equally space on a logarithmic scale. Capactors, Zener diodes, and inductors also use these standards. The first two color bands represent the resistance, the third represents. 4-Band Resistors: These resistors have three color bands located on the left side of the resistor and one on the right. Resistor color code how to#By using the color code chart, one finds that green stands for 5 and blue for 6. How to Identify Resistor Color Code 3-Band Resistors: Designers use these resistors when there is a need for a low resistance value. These are referred to as preferred values or E-series, published in standard IEC 60063:1963. In the example shown here, the 4 bands are green, blue, red and gold. To make mass manufacturing of resistors easier, the IEC (International Electrotechnical Commision) defined tolerance and resistance values for resistors in 1952. ![]() Orange-Orange-Black-Brown-Violet Color CodeĪ resistor colored Orange-Orange-Black-Brown-Violet would be 3.3 kΩ with a tolerance of +/- 0.1%.Ī resistor colored Brown-Green-Grey-Silver-Red would be 1.58 Ω with a tolerance of +/- 2%.Ī resistor colored Blue-Brown-Green-Silver-Blue would be 6.15 Ω with a tolerance of +/- 0.25%. When you see only three color bands on a resistor, you know that it is actually a 4-band code with a blank (20%) tolerance band. The blank (20%) “band” is only used with the “4-band” code (3 colored bands + a blank “band”).Ī resistor colored Yellow-Violet-Orange-Gold would be 47 kΩ with a tolerance of +/- 5%.Ī resistor colored Green-Red-Gold-Silver would be 5.2 Ω with a tolerance of +/- 10%.Ī resistor colored White-Violet-Black would be 97 Ω with a tolerance of +/- 20%. Violet represents ‘7’ and Black represents the value ‘0’. Yellow corresponds to the value ‘4’ in the color chart. All 5-band resistors use a colored tolerance band. Let us consider the color code for the resistor with the bands YELLOW-VIOLET-BLACK-BROWN-GREY. The colors brown, red, green, blue, and violet are used as tolerance codes on 5-band resistors only. ![]()
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