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Дома > Analog technology > 500 Ohm Resistor Color Code, Feature and Uses

500 Ohm Resistor Color Code, Feature and Uses

Время обновления: 2023-12-21 11:49:02


Resistors, the unsung heroes of electronics, play a critical role in every electronic device around us. Among these components, the 500 Ohm resistor, distinguishable by its unique color code, boasts a range of features and versatile uses. In this article, we will demystify this essential electronic component, diving into its color code for easy identification, examining its characteristic features, and exploring the myriad ways it can be utilized in electronic circuits. 


What is a 500 Ohm Resistor?

A 500 Ohm resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. It is designed to have a resistance of 500 Ohms, a unit of electrical resistance in the International System of Units (SI). 

Resistors are used in electrical circuits for various purposes, including reducing current flow, adjusting signal levels, dividing voltages, biasing active elements, and terminating transmission lines, among others. The key feature of a resistor is to create a voltage drop across its terminals proportional to the current, as prescribed by Ohm's Law (V = IR), where V is the voltage, I is the current, and R is the resistance.

The value of a resistor, including a 500 Ohm resistor, is typically identified through a color code on its surface. The resistor color code is a standard used to mark the values of resistors when it is infeasible to print the resistance value directly on the component.

500 Ohm Resistor Feature

A 500 ohm resistor is a key player in an electrical or electronic circuit. The following are some of its basic characteristics:

  • Resistance: The main characteristic of a 500 ohm resistor is its resistance value. It provides a 500-ohm resistance that is used to limit or control the flow of electricity in a circuit according to Ohm's Law.

  • Power Rating: Each resistor has a power rating that indicates the maximum power it can dissipate in the form of heat without being damaged. The power rating of a 500 ohm resistor may vary, with common examples being 1/4 watt, 1/2 watt, 1 watt, etc.

  • Tolerance: Tolerance refers to the accuracy of the resistor value and is also color coded on the resistor. Common tolerance values are ±1%, ±2%, ±5%, and ±10%.

  • Temperature Coefficient: This feature explains how the resistance value of a resistor varies with temperature. It is usually measured in parts per million (ppm) per degree Celsius.

  • Stability: High quality 500 Ohm resistors have excellent stability, ensuring that their resistance does not drift significantly over time or under various environmental conditions.

  • Reliability: The 500 Ohm resistor is a highly reliable component with a long operating life, which makes it ideal for use in circuits that require ruggedness and reliability.

  • Color Codes: The color codes for 500 Ohm resistors follow the standard resistor color code table, which is green, black, brown, and gold for resistors with a tolerance of ±5%. This color code helps the user identify the resistor value, tolerance, and sometimes reliability or failure rate.

These features make 500 ohm resistors a versatile component in a variety of applications, from the most basic electronic gadgets to complex industrial equipment.


500 Ohm Resistor Package

A 500 Ohm resistor can be found in different types of packages, which are designed to suit various applications, manufacturing processes, and assembly methods. The two main categories of resistor packages are through-hole (Leaded) and surface-mount (SMD or SMT) packages.

  • Through-hole Packages: Through-hole resistors have long leads that are intended to be inserted through holes drilled in a printed circuit board (PCB) and then soldered to pads on the opposite side. They are typically used in applications where high power dissipation is required. Two main types of through-hole resistors are axial and radial.

  • Axial Resistors: These are the most common type of through-hole resistor. They are cylindrical in shape with a lead extending from each end. Axial resistors are often used in breadboarding or in applications where the resistor is being hand-soldered.

  • Radial Resistors: Radial resistors are designed with both leads extending from the same side of the cylindrical body. They're primarily designed for mounting on PCBs where the height above the board is a consideration.

  • Surface-Mount Packages: Surface-mount resistors are tiny and intended to be mounted directly onto the surface of a PCB. They are typically used in automated manufacturing processes. They come in several standard sizes including 0603, 0805, 1206, etc. (referring to their dimensions in hundredths of an inch).

  • Chip Resistors: These are a type of surface-mount device (SMD) resistor. The most common types are thick and thin-film chip resistors. Their small size means that they can't dissipate as much heat as through-hole resistors, but their low profile makes them ideal for use in compact electronic devices.

500 Ohm Resistor Color Code

The color coding of a 500 ohm resistor depends on the tolerance of that resistor.

For a 4 band 500 ohm resistor with a tolerance of ±5% (gold), the color codes are:

Green (5)

Black (0)

Brown (1)

Gold (±5%)

500 ohm resistor with a tolerance of ±5% (gold)

Therefore, a 500 ohm resistor with a tolerance of ±5% has a color code of Green-Black-Brown-Gold.

If the 5 band resistor has a tolerance of ±1% (brown), the color code would be:

Green (5)

Black (0)

Black (0)

Brown (1)

Brown (±1%)

tolerance of ±1% (brown)

Therefore, a 500 ohm resistor with a tolerance of ±1% would have a color code of Green-Black-Black-Brown-Brown.

Keep in mind that these color codes are for four-band and five-band resistors. Some resistors, especially precision resistors, may have a six-band color code, where the sixth band represents the temperature coefficient. However, six-band color codes for 500 ohm resistors are less common.

If you want to measure the color code of other resistors besides 1k 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.

Other related articles:

What is a 1k Resistor? 1k Ohm Resistor Color Code

What is a 4k7 Resistor?4.7k ohm Resistor Color Code

500 Ohm Variable Resistor VS 500 Ohm Resistor

A 500 Ohm resistor and a 500 Ohm variable resistor differ primarily in their adjustability of resistance value.

A 500 Ohm resistor is a fixed resistor, meaning its resistance value is set during manufacture and cannot be changed. It will always have a resistance of 500 Ohms (allowing for its specified tolerance) no matter what happens in the circuit.

On the other hand, a 500 Ohm variable resistor (also known as a potentiometer or rheostat depending on how it's used) is an adjustable resistor. It is a three-terminal device, with the resistance value between two of the terminals (the wiper terminal and one of the end terminals) adjustable by turning or sliding a mechanical control. In a 500 Ohm variable resistor, the total resistance across the two end terminals is 500 Ohms, but the resistance between the wiper and an end terminal can be varied from 0 to 500 Ohms.

In a circuit, you'd use a fixed 500 Ohm resistor when you want a constant 500 Ohms of resistance in the circuit. A 500 Ohm variable resistor is used when you want to be able to manually adjust the resistance in a circuit, such as for a volume control, light dimmer, or to adjust the behavior of an analog circuit.

In terms of construction, a variable resistor is generally larger and more mechanically complex than a fixed resistor. It also typically costs more, due to the added complexity and mechanical parts. But the adjustable resistance offers flexibility that can't be achieved with a fixed resistor.


500 Ohm Resistor Uses

Voltage Division: In a series circuit, resistors can be used to create specific voltages by dividing the total voltage. A 500 Ohm resistor can be part of such a voltage divider circuit.

Current Limiting: A 500 Ohm resistor can be used to limit the amount of current flowing to sensitive components, such as LEDs or transistors, to prevent them from being damaged.

Signal Conditioning: In analog electronics, a 500 Ohm resistor can be part of filter circuits, oscillators, or amplifiers to condition signals for proper use.

Biasing: A 500 Ohm resistor can be used to provide proper biasing voltages to transistors or operational amplifiers in a circuit.

Impedance Matching: In some circuits, especially RF (Radio Frequency) circuits, a 500 Ohm resistor might be used for impedance matching to maximize power transfer or minimize signal reflection.

Pull-Up or Pull-Down Resistor: In digital circuits, a 500 Ohm resistor could be used as a pull-up or pull-down resistor to define default states.

500 Ohm Resistor Price

The price of a 500 ohm resistor depends on several factors, including the type of resistor (through-hole or surface mount), power rating, tolerance, package quantity, and supplier.

In general, a common size through-hole 500 ohm resistor (e.g., 1/4 watt power rating and ±5% tolerance) may cost a few cents when purchased in bulk. Surface mount resistors may be cheaper per unit, again depending on the exact specification and quantity purchased.

For retail quantities (e.g., single pieces or small packages), the price per resistor will be higher. For example, you might pay $0.10 to $0.50 per resistor, or even more for specialized types, such as precision or high-power resistors.


Different Watt Types of 500 Ohm Resistor

500 Ohm 1 Watt Resistor

500 Ohm 1 Watt Resistor: This resistor can handle a power dissipation of up to 1 Watt, making it suitable for circuits that need to deal with more heat. The larger physical size compared to lower wattage resistors provides better heat dissipation, allowing it to be used in power electronics.

500 Ohm 1 2 Watt Resistor

500 Ohm 1/2 Watt Resistor: A 500 Ohm resistor with a power rating of 0.5 (1/2) Watt is a compromise between size and heat handling ability. Its smaller size than a 1 Watt resistor makes it fit better in compact circuits, yet it can handle higher power compared to quarter-watt resistors.

500 Ohm 1 4 Watt Resistor

500 Ohm 1/4 Watt Resistor: This is one of the most common types of resistors. Its small size makes it ideal for use in dense circuits, like those on printed circuit boards. With a power rating of 0.25 (1/4) Watt, it's suitable for low-power circuits, such as signal processing.

500 Ohm 5 Watt Resistor

500 Ohm 5 Watt Resistor: With its 5 Watt power rating, this 500 Ohm resistor can handle significant power dissipation. It's physically larger and more heat-resistant, making it suitable for high-power or high-voltage circuits. It's often used in power supplies, amplifiers, or any application demanding high power dissipation.


As we conclude our exploration of the 500 ohm resistor, we are reminded of the sheer complexity and importance of such a seemingly simple component. Its unique color code, various packages and wide range of usage scenarios prove once again its key role in the world of electronics. We hope you find this article helpful.

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  • What does the tolerance of a 500 Ohm resistor mean?
  • The tolerance of a 500 Ohm resistor specifies the range within which the actual resistance can vary. For example, a 500 Ohm resistor with a ±5% tolerance could have an actual resistance anywhere between 475 Ohms and 525 Ohms.
  • In what kind of circuit would a 500 Ohm, 1 Watt resistor typically be used?
  • A 500 Ohm, 1 Watt resistor would typically be used in circuits where moderate power dissipation is required. This could include power electronics, some types of audio equipment, and various other applications where higher power components are necessary.

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