Inductor Color Codes
| Inductor Color Codes (4-Band EIA and 5-Band Mil-Spec Inductors) | ||
|---|---|---|
| Color | 1st Significant Digit | Tolerance |
| Red | 2 | ±2% |
| Orange | 3 | ±3% |
| Yellow | 4 | ±4% |
How do you identify inductor markings?
Inductors can be labeled with a number of different ways. The most common are text codes and color codes….Band colors:
- 1st band: yellow=4.
- 2nd band: violet=7.
- 3rd band: black=10^0=1.
What is the tolerance value of a 4 band inductor if the fourth band color is black?
Fig 3.4.1 Four Band Standard EIA Colour Code For Inductors.
| Band | 1 | 4 |
|---|---|---|
| Meaning | 1st Digit | Tolerance % |
| Gold | +/-5% | |
| Silver | +/-10% | |
| Black | 0 | +/-20% |
What is inductor unit?
An inductor is characterized by its inductance, which is the ratio of the voltage to the rate of change of current. In the International System of Units (SI), the unit of inductance is the henry (H) named for 19th century American scientist Joseph Henry.
Are inductors green?
Axial inductors tend to be sea foam green, although some are pea green or even cyan. The cyan ones you can tell from 1% resistors because they have one fewer band. The easiest, and most reliable, way is to look at the designator (and on a through-hole board, there is almost always a printed designator).
How do you read the inductance of an inductor?
One method, measuring inductance on a voltage-current slope, involves connecting the inductor to a pulsed voltage source with a duty cycle less than 50%. Using an oscilloscope’s current probe, read the peak current in amps and the time between pulses in microseconds.
What do inductors look like?
An inductor is a component consisting of a wire or other conductor shaped to increase the magnetic flux through the circuit, usually in the shape of a coil or helix, with two terminals.
How do you decode an inductor?
Surface mount inductors or chip inductors use color dots instead of color bands. There are generally three dots that are read clockwise from the top. The first two dots indicate the significant digits of the inductance value, and the third dot indicates the multiplier. The value of inductance is obtained in Nano Henry.
Which digit on the 1st band does the color yellow denote on a resistor color band?
4
For example, a resistor with bands of yellow, violet, red, and gold will have first digit 4 (yellow in table below), second digit 7 (violet), followed by 2 (red) zeros: 4,700 ohms. Gold signifies that the tolerance is ±5%, so the real resistance could lie anywhere between 4,465 and 4,935 ohms.
How do you read an inductor code?
Inductor Value Identification using Text Marking
- It consists of three or four letters (including alphabets and numerical digits).
- First two digits indicate the value.
- Third digit is the power to be applied for the first two , this means it is the multiplier and power of 10.
What is inductor 12th?
An inductor is a passive component that is used in most power electronic circuits to store energy in the form of magnetic energy when electricity is applied to it. One of the key properties of an inductor is that it impedes or opposes any change in the amount of current flowing through it.
What is indinductor color code?
Inductor color code. The inductance of an inductor can be calculated with the colors of the bands. Inductors can have four or five bands. Smaller inductors use numbers instead of colors, You can find more about these here. Inductance: 0. Tolerance: 0.
What is the tolerance of a 47 UH inductor with 5 bands?
Consider the below inductor with band colors yellow, violet, black and silver. 4th band is silver = ±10% tolerance. Thus by this we can say that the inductor is 47 uH with ±10% tolerance. Usually cylindrical molded inductors are marked with 5 coloured bands.
How to calculate multiplier band color of an inductor?
If the multiplier is gold divide the value by ‘10’ and if the multiplier band is silver, divide the value by ‘100’. Consider the below inductor with band colors yellow, violet, black and silver.
What do the colors of the inductance and tolerance bands mean?
The next three bands indicate the inductance in micro-henries and the fourth band is the tolerance. Color coding is in accordance with the color code table shown right. If the first or second band is gold, this represents the decimal point for inductance values less than ten.
