Resistors are basic electronic components that play crucial roles in providing stability and functionality to electronic circuits through current and partial voltage limitations and signal regulation. The result of choosing a wrong resistance value is too high current, unstable performance of the circuit, and eventual destruction of the component. So you need to know very clearly about the resistance value and nature of the resistor for circuit to work in regular way.

In the various resistance values, the resistance of 4.7K (4700 ohms) is preferred because it is in the middle of the resistance level with a wider application range and is a reliable and efficient solution, regardless of laboratory design or industrial-scale PCBA production. The 4.7K resistance color code is essential knowledge for engineers and electronics enthusiasts not only to help select components correctly but also to avoid errors in the SMT assembly line. So, in this article today, you will learn about the 4.7K ohm resistance color code, specifications, and the working utility of a 4.7 k resistor in an electronic circuit.

What is a 4.7k Resistor?

A 4.7K resistor is a passive electronic component with a resistance of 4700 ohms, designed to limit current, divide voltage, or stabilize circuit operation by controlling the flow of electrical energy, and is often used in scenarios where moderate resistance is required.

4.7K resistance characteristics

1. Resistance value

The 4.7K ohm resistor has a resistance value of 4700 ohms, which makes it suitable for a variety of general-purpose circuit designs, and can effectively limits the current flow through a specific path while maintaining a moderate voltage drop. It is a common choice for voltage dividers and signal regulation circuits.

2. Tolerance

Tolerance is the range within which the actual resistance of a resistor is allowed to deviate from the nominal value. Common 4.7K resistance tolerances are:

±1% : The 4.7k resistance of this tolerance, shown below, is commonly used in high-precision circuits such as sensors and amplifiers.

±5%: The figure below is suitable for general electronic design and is the most common tolerance range.

±10%: The 4.7k resistance of this tolerance is commonly used in circuits with low accuracy requirements, such as some basic power supplies or experimental prototypes.

3. Power rating

The power rating is the amount of power that a resistor can safely consume under normal operating conditions. Common power ratings for 4.7K resistors are:

1/4 Watt (0.25W): Suitable for most conventional circuits.

1/8 Watt (0.125W): Commonly used in low-power circuits or compact designs.

When selecting the power rating, you should ensure that the resistor can withstand the power load in the circuit so that the resistor does not overheat or damage.

4. Style

4.7K resistors are available in the following two packages:

Through hole resistance: suitable for hand welding or applications requiring higher mechanical strength, such as prototyping or industrial control circuits.

Chip Resistance (SMD) : suitable for automated assembly and are widely used in high density PCB designs and modern consumer electronics devices.

5. Maximum voltage

The maximum voltage range of a 4.7K resistor depends on its power rating and material characteristics. The common range is 50V to 250V. Low power resistors typically support 50V to 100V, while higher power models may support up to 250V and beyond.

4.7k resistors have become one of indispensable components in analog and digital circuit design because of their stable resistance range, diverse tolerance, flexible power selection, and adaptive package. Whether in experimental development or industrial production, it provides reliable performance and wide applicability.

4.7k Resistor Color Codes

The resistance value of the resistor is identified by the color ring code, which represents the resistance value and tolerance of the resistor, such as the 3.3k resistor color code and 10k resistor color code we talked about earlier. A typical resistor usually has 4 or 5 color rings for the specified value.

Here is a table describing the meanings of each color ring:  Link

Then, according to the two tables above, the 4.7k resistor color (yellow-purple-red-gold) code 4 band represents:

47x100=4700ohm, tolerance:±5%.

4.7k resistance color (yellow - purple - black - brown - brown) code 5 band says:

470x10=4700ohm, tolerance:±5%.

During PCB assembly, the resistance value of the resistor is usually coded as a mark on the PCB board so that the pick and placement machine can quickly identify it and equip the surface mount assembly in bulk. For example, 4.7K resistance is marked with 472, where 4 and 7 represent the first two digits of the resistance value, and 2 indicates the multiplier (10²). This calculation gives 47×10²=4700Ω

Applications of 4.7k Resistor

The 4.7K resistance has more common applications in the circuit, mainly used in the voltage division circuit, together with other resistors to proportionally distribute the voltage, often used to adjust the sensor output or provide a reference voltage for the circuit, etc.

In an LED circuit, it is furthermore used as a a current limiting device to keep the current from overburning the LED. In addition, its use as a pull-up or pull-down resistor can be used to stabilize the high or low potential of the unconnected pins, that is, to avoid interference in the digital circuit. In signal regulation, these 4.7K resistors combine with the capacitors to filter out the high-frequency noise thus enhancing the signal stability and make it free from noise. In such a timing circuit, the value of the resistors with the capacitors used together also controls the time delay of the signal or the oscillation frequency, for which commonly used 4.7K resistors can be found. It can also be used for impedance matching of network terminal devices to minimize reflection and distortion in signal transmission and ensure the stability of data transmission. In summary, 4.7K resistors are essential in controlling, safeguarding, and supporting a circuit, and they form a foundation in most circuit design.

Comparison of 4.7K resistance with other resistance values

FAQs

1. Can I put 4.7K resistors in series to increase the resistance value?

Yes, by connecting two 4.7K resistors in series, a total resistance of 9.4K ohms can be achieved.

2. What is the code for a 3.3K SMD resistor?

The code for a 3.3K SMD resistor is 332.

3. What is the code for a 10K SMD resistor?

The code for a 3.3K SMD resistor is 103.

4. How to identify the burned 4.7K resistor?

Check for discoloration or measure its actual resistance.

Conclusion

Understanding the color ring code and electrical characteristics of 4.7K resistors is critical to optimizing circuit design. 4.7K ohm resistor is a common and versatile component that is widely used in a variety of electronic circuits, especially in voltage separation, current limiting and signal stabilization. The 4.7K resistor has a resistance value of 4700ohm, which is suitable for the design requiring a medium resistance value. By mastering its resistance value, tolerance and power parameters, you can ensure that the correct components are used in the design and assembly process to avoid circuit failure or component damage caused by the wrong resistance. In addition to mastering 4.7k resistance, we also recommend that you understand the color ring code of other common resistance values (such as 1K, 2.2K, 3.3K, 10k, etc.) in order to choose the right components more flexibly and improve the efficiency and reliability of the project design.

As a professional PCB assembler, we(PCBasic) are able to provide high-quality resistors and a full range of circuit assembly services. If you have any questions, please feel free to contact us!