What is a 47k Resistor？47k ohm Resistor Color Code

What is a 47k Resistor?

47k resistor is a crucial electronic component designed to govern the flow of electric current within circuits. Like all resistors, it is pivotal in controlling current or voltage, finding applications in voltage division, transistor biasing, and amplifier gain setting. The designation "47k" specifies a resistor with a resistance value of 47,000 ohms, much like the 1k resistor, which signifies 1,000 ohms. Compared to higher resistance values, such as 10k or 100k, the 47k resistor strikes a balance, allowing an intermediate current to traverse the circuit. This precise control over current flow makes the 47k resistor indispensable for achieving desired electrical characteristics in various electronic applications.

47k Ohm Resistor Color Code

The resistor color code is a system used to represent the resistance value of a resistor. This code comprises 3, 4, or 5 color bands, each assigned a specific number to create a resistance value. The body color of the resistor holds no significance.

The figure below displays the color code for a 47k Ohm resistor with a tolerance of ±5%. The color sequence for a resistor with 4 bands is Yellow, Violet, Orange, and Gold.

Color	Digit	Multiplier	Tolerance
Yellow	4	10^0	-
Violet	7	10^1	-
Orange	-	10^3	-
Gold	-	-	5%

For the 47k ohm resistor:

Yellow (1st band): The yellow color now represents the first digit of the resistance value, which corresponds to the number 4.

Violet (2nd band): The violet color indicates the second digit of the resistance value. In the context of a 47k resistor, violet corresponds to the number 7.

Orange (3rd band): The orange color continues to denote the multiplier for the resistance value. In this case, red corresponds to 10^3, meaning the resistance should be multiplied by 1,000. Thus, the value of the resistor is 47 * 1,000 = 47,000 ohms or 47k ohms.

Gold (4th band): The gold color is the tolerance indicator. For a 47k ohm resistor with a 5% tolerance, the actual resistance can fluctuate from 44,650 ohms (47,000 - 5%) to 49,350 ohms (47,000 + 5%).

To summarize, a 47k ohm 4-band resistor with the color code of yellow-violet-orange-gold has a resistance value of 47,000 ohms, with a tolerance of 5%. For a 47k ohm resistor with a 5-band color code, the sequence would be yellow-violet-black-red-(Tolerance). Understanding these color codes is pivotal for electronics professionals to identify and implement resistors in diverse circuit applications accurately.

How to Read 4-band 47K Ohm Resistor Color Code

The initial band's color signifies the value of the first significant digit, denoted by Yellow, which corresponds to the digit 4.

The second band's color indicates the value of the second significant digit, denoted by Violet, corresponding to the digit 7. This value is appended to the right of the first digit (from the first band). Consequently, the combined digits from the first and second bands are 47.

The third band's color signifies a decimal multiplier used to multiply the first two digits to determine the resistor's resistance value. It involves taking the digits and multiplying them by a multiplier denoted by this band. The multiplier is expressed as 10^n, where n represents the value of the band color. In this instance, the third band is Orange, corresponding to 3. Therefore, the multiplier is 10^3 = 1000.

Consequently, the total resistance value derived from the colors is 47 x 10^3 Ω = 47000 Ω.

The fourth band indicates the tolerance values, with a Gold band used in this instance, resulting in a tolerance of 5%.

In conclusion, the resistance value of the resistor with color bands Yellow, Violet, Orange, and Gold is 47k Ohms with a ±5% tolerance.

If you want to measure the color code of other resistors besides 47k ohm resistor color code, you can use Resistor Color Code Calculator, which will help you to identify the color code of resistors accurately and quickly. Besides that, you can read this article for details about the color codes of the 1k resistors: What is a 1k Resistor？1k ohm Resistor Color Code.

Applications of 47k Resistor

The versatility of the 47k ohm resistor makes it a valuable component in electronics, contributing to tasks. Here are the common uses:

Voltage Division

The 47k ohm resistor is commonly used in voltage divider circuits. In these configurations, it works with another resistor to create a fraction of the input voltage, enabling precise voltage levels for various components in a circuit.

Biasing Transistors

In transistor circuits, the 47k ohm resistor is employed for biasing purposes. Biasing ensures that the transistor operates in its linear region, allowing for accurate amplification of signals. The resistor helps set the base voltage, influencing the transistor's operating point.

Setting Gain in Amplifier Circuits

Amplifier circuits often utilize 47k ohm resistors to set the gain of the amplifier. By determining the ratio between input and output resistors, the gain can be adjusted to meet the application's specific requirements, providing the desired amplification.

Final Words

In summary, the 47k resistor holds significant importance in various electronics endeavors. It serves the crucial function of regulating the flow of electrical current, preventing potential burnouts and establishing a secure environment for soldering activities. Despite the apparent simplicity of this resistor type, it is advisable to consult reputable sources for accurate information and selection guidance. Before installing a 47k resistor, it is imperative to meticulously verify measurements and ensure the utilization of appropriate tools for the task at hand. Not all resistors share identical attributes; therefore, a prudent approach involves comparing ratings and brands before finalizing a purchase. Through thorough research and preparedness, securing the ideal 47k resistor for specific requirements becomes straightforward. Jotrin provides high-quality resistors. Welcom to RFQ.

Read More

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• What is a 10k Resistor? 10k Ohm Resistor Color Code

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