4 Color Band Resistor
Patrizia Leones
I don't want to say what color band is last or first(I don't know how to determine the order of the color bands) but the two outer bands are both brown, with there being three black bands in between them, again, making a total of five color bands.
What does all this specify? Does anybody know where I can get quality resistors(that are better documented and come with written specifications) at a good deal? And if I have this problem again, can someone please supply me with links that can instruct me on how to competently decipher resistor color coding and anatomy. Thank you.
Normally the tolerance of the resistors has a slightly farther gap than the other color bands. In the case where it doesn't have the gap i'd measure it from both sides, and use the more realistic value or make a small resistor divider to determine the resistance. You'll just have to know the value of one resistor.
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.
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.
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.
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.
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.
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.
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 5th 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.
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 4th and 5th position as compared to a typical four-band resistor.
On the most precise of resistors, a 6th band may be present. The first three bands would be the significant figure bands, the 4th the multiplier, the 5th the tolerance, and the 6th could be either reliability or temperature coefficient. There are also other possible variations, but these are some of the more common configurations.
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.
I know the values of resistors if they are gold-colored at the end. When both ends are the same, such as brown-o-p-brown and red-x-y-z-red, I am in problems. How to know which side has the last colour and which side is the starting end?
I asked a similar question a long time ago here but the resistor chart which was mentioned there appears to have moved. So from its new home at itll.colorado.edu here's the diagram, as far as I can tell one band will be thicker signifying it as the tolerance band (no-one responded when I queried whether this was the case in the previous post above so if I'm wrong please let me know).
You can try reading it both ways, and see which of them makes more sense. For example brown-orange-violet--brown would be 130M 1% which is a standard value (though a very high one) while brown-violet-orange--brown would be 17K 1% which is not.
After hours of painstaking work of trying to figure out exactly how wide the gaps are on either end, I noticed there was a light print on the package which held the resistors together. That had the Ohms printed.
(BTW some older resistors with 5-bands and a gold 4th band were different, but that's not the case
here with standard modern metal-film in my experience, a 4th gold band is a 0.1x multiplier - all my
stock resistors in the range 1 to 91 ohms are the modern coding)
You and me both! I have started double checking resistors on a meter now. When I buy more, I try to get the three band types where I can. I think the new background colour adds to the difficulty with reading as well as it is not immediately obvious which end is band one.
I, for one, welcome the new 5-band resistors. I think you will soon find that they are the only kind manufactured. It's cool to have 1% resistors for basically no additional cost - and with no difficulty finding a particular value.
aarg:
I, for one, welcome the new 5-band resistors. I think you will soon find that they are the only kind manufactured. It's cool to have 1% resistors for basically no additional cost - and with no difficulty finding a particular value.
I have almost abandoned colour coded resistors these days, preferring a simple A4 folder of surface mount parts to a whole rack of small draws.
The solder very well between tracks on a strip board or across breakers in the track.
Yes Mike, that is certainly a good idea and I have done it with bypass capacitors on linear regulators. However, getting older means a lack of dexterity and eyesight which makes SMD life interesting to say the least. That may also be why I don't like the four band resistors, I just can't see what they are at a quick glance like I can with the older ones.
That might be a four-band, wire-wound resistor at 1 Ohm, 5% tolerance, with a fifth band for a specific purpose. Try the Resistor Color Code Calculator, again, with brown, black, gold, and gold in the 4-Band mode.
I settled on wire-wound because sometimes the wide band indicates that composition. The same color band code may apply, though, because I came across references to older resistors having a fifth band that indicated something other than the preceding resistance, multiplier, and tolerance.
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The online resistor calculator is a tool by Utmel Electronic used to calculate resistor values for 4 band, 5 band, and 6 band resistors, in the range of ohms, Kilo Ohms, and Mega Ohms typically. And this resistance calculator is developed to calculate the color code using the resistor color codes on their surface.Just select the right color corresponding to each column and you can get the Resistor value on the right of the calculator immediately.
Take a 4-band resistor as the example, 10k ohm resistor color code 4 band is: Brown-Black-Orange-Red. So the 1st band of Color: Brown, 2nd band: Black, Multiplier: Orange and Tolerance: Red. Thus, the output of resistor value is 10K ohms 2%. And the below picture shows you the 100 Ohm Resistor Color Code for 4-band resistors.
Resistors are usually used in electrical components with the aim of restricting the flow of electric current. They are usually tiny components with wire leads protruding from all sides. Resistors are special electronic components in circuits. It is made with the purpose of a precise quantity of electrical resistance.
The range of resistors may be from less than 1 Ohm (Ω) to over 20 mega Ohms (Ω) or 20 million Ohms (Ω). And there are two types of resistors: variable resistors and fixed resistors. A variable resistor can provide different values of resistance, however, the fixed resistor just has a single value. Meanwhile, there are 4 main classes of fixed resistors: carbon-composition resistors, Film resistors, wire wound resistors, and surface-mount resistors.
Generally, the carbon-composition resistors have 3 to 6 resistor color bands. And the below electrical color code resistor chart shows you the resistor strips of the 3 band type, 4 band type, 5 and 6 band type. Compared with a 4-band resistor, a 5-band type is more precise because of its third significant digit. And a 6-band resistor has the 6th band, which is a temperature coefficient band.
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