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

What is a 47k Resistor?

A 47K resistor refers to a resistor with a resistance value of 47,000 ohms. The "K" in 47K represents the metric prefix "kilo," which denotes a multiplication factor of 1,000. Therefore, a 47K resistor has a resistance 47,000 times greater than the base unit of resistance, which is the ohm.

Similar to other resistors, a 47K resistor is an electronic component used to impede the flow of electric current in a circuit. The resistance value of 47K determines how much the resistor limits the flow of current. In this case, the resistance of a 47K resistor is higher than lower-value resistors such as 1K (1,000 ohms) or 10K (10,000 ohms).

Resistors are widely used in electronics for various purposes, including current limiting, voltage division, biasing, and signal conditioning. They come in different power ratings, tolerance levels, and physical sizes. The color code or numerical marking on the body of the resistor indicates its resistance value and tolerance, making it easy to identify and utilize in circuits.

47k Ohm Resistor Color Code

The color code for a 47K resistor, according to the standard 4-band resistor color code system, is:

Yellow, Purple, Orange, Gold

Let's break down the color code for a 47K resistor:

1st Band (1st significant digit): Yellow = 4 2nd Band (2nd significant digit): Purple = 7 3rd Band (Multiplier): Orange = 1,000 4th Band (Tolerance): Gold = ±5%

Putting it all together, the 47K resistor has a resistance value of 47,000 ohms (+/- 5% tolerance).

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

To read the 4-band color code for a 47K Ohm resistor, follow these steps:

1. Identify the color bands:

   • Locate the four color bands on the resistor.

2. Determine the digit associated with each color band:

   • Use a resistor color code chart or table to determine the value associated with each color band.

3. Decode the color code:

   • Apply the color code to the resistor's bands.

For a 47K Ohm resistor with a 4-band color code:

• The first band (1st significant digit) is yellow, which represents the value 4.
• The second band (2nd significant digit) is purple, which represents the value 7.
• The third band (Multiplier) is orange, which represents a multiplier of 1,000.
• The fourth band (Tolerance) is gold, representing a tolerance of ±5%.

4. Combine the values:
   • Combine the significant digits (4 and 7) and multiply them by the multiplier (1,000).

Therefore, the resistance value of the 47K Ohm resistor is 47,000 ohms or 47 Kiloohms (KΩ), with a tolerance of ±5%.

Applications of 47k Resistor

A 47K resistor, with its specific resistance value, finds applications in various electronic circuits. Here are some common applications of a 47K resistor:

1. Voltage Dividers: A 47K resistor can be used as one of the resistors in a voltage divider circuit to divide a voltage signal. It helps in scaling down the input voltage to a desired value based on the ratio of the resistor values in the voltage divider network.

2. Pull-Up and Pull-Down Resistors: In digital circuits, a 47K resistor can function as a pull-up or pull-down resistor. It ensures that the voltage level of an input signal is well-defined when it is not actively driven. The 47K resistor is usually chosen when a moderate level of resistance is needed.

3. Biasing Networks: In amplifier circuits, a 47K resistor can be employed in biasing networks to establish the operating conditions of the amplifier stages. It helps set the appropriate voltage levels for transistors or operational amplifier inputs, ensuring proper amplification.

4. Current Limiting: The 47K resistor can be used as a current-limiting resistor in various parts of a circuit. By placing it in series with a load, it restricts the amount of current flowing through the load, protecting the load and preventing excessive current.

5. Timing Applications: The combination of a 47K resistor with capacitors can create timing circuits, such as RC oscillators and time delay circuits. The 47K resistor affects the charging or discharging time of the associated capacitor, enabling timing functionality in the circuit.

6. Sensor Circuits: In circuits involving sensors, such as temperature sensors or photoresistors (LDRs), a 47K resistor can be used for biasing or as a part of the sensor circuit to achieve the desired operating range and sensitivity.

These are just a few examples of how a 47K resistor can be applied in electronic circuits. The specific application depends on the requirements of the circuit and the nature of the components and signals involved.

Final Words

In conclusion, resistors are fundamental components in electronic circuits and play a crucial role in various applications. They provide resistance, voltage division, current limiting, biasing, and other functionalities that are essential for proper circuit operation. Different resistor values, such as the 47K resistor, are selected based on specific circuit requirements.

Throughout this conversation, we discussed the importance of pull-up and pull-down resistors in maintaining defined logic levels in digital circuits, as well as the overview, features, and applications of specific components like the SBAV99WT1G diode array and the BSS123 MOSFET.

Remember to always consult datasheets, application notes, and design guidelines specific to the components and circuits you are working with. Electronic components and their applications continue to evolve, so staying updated with the latest information and best practices is important.

I hope this information has been helpful to you. If you have any further questions, feel free to ask. Happy circuit building!

What is the meaning of 47k ohm?

The term "47k ohm" refers to a resistor with a resistance value of 47,000 ohms. The "k" suffix represents the metric prefix "kilo," which denotes a multiplication factor of 1,000. In the case of 47k ohm, the resistance value is 47 times 1,000, equaling 47,000 ohms.

The ohm (symbol: Ω) is the standard unit of electrical resistance. It measures how much a resistor opposes the flow of electric current in a circuit. A higher resistance value, such as 47k ohm, restricts the flow of current more than a lower resistance value.

Resistors with different resistance values are used in electronics for various purposes, including current limiting, voltage division, biasing, and signal conditioning. The specific value of the resistor depends on the requirements and specifications of the circuit.

What is the value of the 47K resistor?

The value of a 47K resistor is 47,000 ohms. The "K" in 47K represents the metric prefix "kilo," which denotes a multiplication factor of 1,000. Therefore, the resistance of a 47K resistor is 47 times 1,000, which is equal to 47,000 ohms.

How can you represent 47 kilo ohm resistance in the carbon colour code?

To represent a 47 kilo-ohm (kΩ) resistor using the carbon color code, you would typically use a 5-band resistor color code. Here is the color code breakdown for a 47kΩ resistor:

1st Band (1st significant digit): Yellow 2nd Band (2nd significant digit): Violet 3rd Band (3rd significant digit): Orange 4th Band (Multiplier): Red 5th Band (Tolerance): No band (default tolerance of ±20%)

Putting it all together, the color code for a 47kΩ resistor would be:

Yellow, Violet, Orange, Red

Please note that while the 5-band color code is commonly used for higher precision resistors, lower precision resistors may use a 4-band color code, where the tolerance band is omitted. In such a case, only the first 4 bands would be used to represent the resistance value.

What is the difference between 4.7k and 47k?

The difference between 4.7k and 47k lies in the magnitude of the resistance value.

4.7k refers to a resistor with a resistance value of 4.7 kilo-ohms (4.7kΩ). The "k" represents the metric prefix "kilo," which denotes a multiplication factor of 1,000. Therefore, 4.7kΩ corresponds to 4.7 times 1,000, equal to 4,700 ohms.

On the other hand, 47k represents a resistor with a resistance value of 47 kilo-ohms (47kΩ). Similar to the previous example, the "k" signifies the kilo prefix, which implies a multiplication factor of 1,000. In this case, 47kΩ is equal to 47 times 1,000, resulting in 47,000 ohms.

In summary, the primary distinction is that 4.7kΩ has a resistance value of 4,700 ohms (4.7 kilo-ohms), while 47kΩ has a resistance value of 47,000 ohms (47 kilo-ohms).

How do I know if my resistor is 47k?

To determine if a resistor is 47k, you can use a multimeter or identify the resistor color code. Here are two methods you can use:

1. Multimeter Method:

   • Set your multimeter to the resistance (ohms) mode. Look for the Ω symbol on the multimeter.
   • Disconnect one end of the resistor from the circuit, if necessary, to obtain an accurate measurement.
   • Touch the two leads of the multimeter across the resistor terminals, ensuring a good connection.
   • Read the resistance value displayed on the multimeter. If the measured resistance is close to 47,000 ohms or within the expected tolerance range (considering the resistor tolerance), then the resistor is likely 47k.

2. Resistor Color Code:

   • Examine the color bands on the resistor carefully. Most resistors use a color code system to indicate their resistance.
   • Identify the color bands and their corresponding values. A typical four-band resistor color code for 47k ohms is yellow, purple, orange, and gold (respectively representing 4, 7, 3 zeros, and a tolerance of ±5%).
   • You can also use an online resistor color code calculator to visually verify the color code and determine the resistance value.

Remember that the accuracy of the measurement and identification relies on using reliable equipment and distinguishing the color bands accurately. If you have any doubts or difficulties, it is advisable to seek assistance from someone experienced in working with electronic components or consult a professional.