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The third band represents the multiplier which basically shifts the decimal place around so as to change the value from megaohms to milliohms including the values in between.Tolerance is signified by the fourth color band. The 4-band code is used for marking low precision resistors with 5%, 10% and 20% tolerances. (The third band of the 4 band resistor or the fourth band of the 5 band resistor that is a multiple is the number of zeros after the significant digits.

(3) When the second band is black, the color represented by the third band is an integer, that is, several, several tens, several hundred kΩ, etc. The fourth band is gold, indicating a tolerance of 5%.Example 2: When the four color bands are brown, black, orange, and gold in sequence, because the third band is orange and the second band is black again, the resistance value should be a whole dozen of kΩ.
)(4) Remember the tolerance represented by the color of the fourth band, that is 5% for gold; 10% for silver; 20% for colorless.Example 1: When the four color bands are yellow, orange, red, and gold in sequence, because the third band is red and the resistance range is a few kΩ, the numbers "3" and "4" are represented by the two colors of yellow and orange respectively, and its reading is 4.3 kΩ. For the six-band resistor it’s the same concept as the five-band but with an additional ring which indicates the reliability, or temperature coefficient (ppm/K) specification.Zero-ohm resistors are recognized by their single black band, they are basically wire links used to connect traces on a printed circuit board. Method of finding the value of through hole resistor • Digit digit multiplier tolerance (for 4 band resistor ) • Digit digit digit multiplier tolerance (for 5 band resistor) Yellow Violet Red = 4 7 2 = 4 7 x 102 = 4700Ω or 4.7or 4k7. If the resistors are a mixed bag of singles, that can be quite the chore. The brown band is often used as both a band marks resistor tolerances and a valid number band. Black 0, whose effective number is 220. In the middle of the color chart, you will find the standard rainbow colors in order for numbers 2 through 7, so your childhood ROY-G-BIV acronym comes into play, minus the color indigo.Just remember that brown fits between black and red as number “1” and grey fits between violet and white as “8” and you’ve got it!

The value is 100 × 10000 = 1MΩ, and the tolerance is 1%, which is the normal resistance value. In the above example, the first three color bands are red, red and black, so their corresponding numbers are red 2, red 2. This is a special case when reading resistor color code, so pay attention to it. The color information representing the resistance value can be read at once from any angle. The third band represents the multiplier which basically shifts the decimal place around so as to change the value from megaohms to milliohms including the values in between.

Resistor SMD Code. Then read the fourth multiple color band, Brown 1. Read them in this way, and repeat them a few times to remember.Remember that the order of magnitude of the color of the third band is the key to quick understanding.

Resistors are available in a range of different resistance values from one Ohm ( Ω ) to millions of Ohms. From the other end of the resistor, find the first and second color bands and read their corresponding numbers.

The fifth band tells you the tolerance. It also indicates that the resistance is acceptable, that is, a good resistance between 1140-1260. The value of the resistance is represented by the first few bands.

The color band marking is mainly applied to cylindrical resistors, such as carbon film resistors, metal film resistors, metal oxide film resistors, fuse resistors, and winding resistors.In practice, it is found that the arrangement order of some resistors' color code is not clear, and it is often difficult to read. For example, the third band is red, so its resistance is a few kΩ. The fourth band is gold with a tolerance of 5%.In some cases that are difficult to distinguish, you can also compare the colors at the two starting ends, because the first part of the calculation, that is, the first color, will not be three colors: gold, silver, and black. As such, sometimes you have no option but to verify the resistance with an ohm-meter.

Understanding is key for you to be in a position to read resistor color codes, you also need to have an understanding of the math behind each band that is used in the indication of resistance, tolerance, value, and even temperature coefficient.Resistors come in different physical sizes, values, and shapes.

Figure1. Gold represents 5% and silver represents 10%.

No matter how it is installed, Maintenance staff can easily read its resistance value for detection and replacement.

If the fifth color band is black, it is generally used as a winding resistor.


The fifth color band is the tolerance rate.First, from the bottom of the resistor, find the color band that represents the tolerance accuracy. You can count on the actual resistance of a precision resistor being really close to its nominal value.


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