What is a 4k7 Resistor？4.7k ohm Resistor Color Code
Update Time: 20230217 18:32:10
Have you ever wondered what those colorful little stripes on a resistor mean or what a 4k7 resistor is used for in electronics? Well, wonder no more  in this article, we'll explore the ins and outs of 4k7 resistors, from their basic properties to their various applications.
What is a 4k7 Resistor?
A 4k7 resistor, also known as a 4.7k ohm resistor, is an electronic component with a resistance of 4.7 kiloohms, or 4,700 ohms. The "k" in 4k7 stands for "kilo," which means 1,000. The resistance of a resistor is measured in ohms, a unit of electrical resistance. Resistors are used to limit the flow of electric current in a circuit and are commonly used in various electronic devices.
4k7/4.7k Resistor Color Code
The color code for a 4.7k resistor is typically yellow, purple, red, and then gold.
Color First Band Second Band Multiplier Band Tolerance Band Yellow 4
7 $10^0$ Gold Violet 4 7 $10^1$ None Red 4 7 $10^2$ None Gold N/A N/A $10^{1}$ 5%
The first band (yellow) represents the first digit of the resistance value, which is 4.
The second band (violet) represents the second digit of the resistance value, which is 7.
The third band (red) represents the multiplier, which is 100. So, the total resistance value is 47 x 100 ohms, or 4.7k ohms.
The fourth band (gold) represents the tolerance of the resistor, which is +/ 5%. This means the actual resistance value of the resistor can vary by up to 5% from the nominal value of 4.7k ohms.
The colour code is an important visual indicator that allows you to quickly determine the value and tolerance of a resistor without having to use a multimeter or other measuring tool.
Resistance Tolerance of 4.7k Resistor
The resistor's tolerance specifies the range of acceptable resistance values that the resistor can have. For a 4.7k ohm resistor, the tolerance can vary depending on the manufacturer and the specific series of resistors. The most common tolerance values for 4.7k ohm resistors are 1%, 5%, and 10%.
The actual resistance of a 1% tolerance 4.7k resistor can range from 4.653k ohms to 4.747k ohms.
The actual resistance of a 5% tolerance 4.7k resistor can range from 4.465k ohms to 4.935k ohms.
The actual resistance of a 10% tolerance 4.7k resistor can range from 4.23k ohms to 5.17k ohms.
It's important to note that resistors with tighter tolerances (such as 1%) are generally more expensive than those with looser tolerances (such as 10%). Therefore, it's important to consider the requirements of the circuit and the acceptable range of resistance values when choosing a resistor with a particular tolerance.
Common uses for 4.7k ohm Resistors
Pullup or pulldown resistors
In digital circuits, 4.7k ohm resistors are often used as pullup or pulldown resistors to ensure that the voltage level of a signal is maintained even when the signal is not being actively driven. These resistors can help prevent input signals from floating, resulting in unexpected behavior.
Voltage dividers
4.7k ohm resistors are often used in voltage divider circuits to generate a specific voltage level. A voltage divider consists of two resistors in series, and the output voltage is proportional to the ratio of the two resistor values. 4.7k ohm resistors are popular for voltage dividers due to their availability and tolerance.
Analogue signal conditioning
In analogue circuits, 4.7k ohm resistors can be used as signal conditioning circuits to adjust the gain or offset of an input signal. They can be used with other resistors, capacitors, and op amps to implement various signal conditioning functions.
Current limiting
4.7k ohm resistors can also be used as current limiting resistors, for example, to limit the current flowing through an LED or to protect a microcontroller input from overvoltage.
Oscillator circuits
4.7k ohm resistors are commonly used in oscillator circuits to set the oscillator's frequency. They can be used with other components, such as capacitors and transistors, to generate a precise frequency signal.
4k7 Resistor QAF
Can a 4.7k ohm resistor be used in series to increase resistance?
Connecting two or more 4.7k ohm resistors in series will increase the total resistance.
What is the difference between a 4.7k ohm resistor and a 47k ohm resistor?
Their resistance value is the main difference between a 4.7k ohm resistor and a 47k ohm resistor. The former has a resistance of 4.7k ohms, while the latter has a resistance of 47k ohms.
What is the maximum voltage a 4.7k ohm resistor can handle?
The maximum voltage a 4.7k ohm resistor can handle depends on its power rating and other factors, such as the ambient temperature. Generally, a 1/4watt resistor can handle up to 200 volts.
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