Description

The 18K Ohm 1/2W 5% Through Hole Resistor is a widely used electronic component that is ideal for various applications such as current limiting, voltage division, and signal processing. With a resistance value of 18K ohms (18,000 ohms), a power rating of 1/2 watt (0.5W), and a 5% tolerance, this resistor is suitable for use in low-to-medium power circuits. Its through-hole mounting design ensures secure and reliable installation into printed circuit boards (PCBs), making it ideal for both prototyping and mass production.

Key Specifications:

• Resistance: 18K ohms (18,000 ohms)

  • The 18K ohm resistor is commonly used in circuits where higher resistance is needed to control the flow of current or to scale down voltage. It is frequently found in voltage divider circuits, signal conditioning, and filtering applications.

• Power Rating: 1/2 watt (0.5W)

  • This resistor has a 1/2 watt power rating, allowing it to safely dissipate up to 0.5 watts of electrical power without the risk of overheating, making it suitable for low-to-medium power applications.

• Tolerance: ±5%

  • The 5% tolerance indicates that the actual resistance can vary by 5% from the nominal value. For the 18K ohm resistor, the actual resistance could range from 17,100 ohms to 18,900 ohms.

• Mounting Type: Through-hole

  • The through-hole mounting design allows the resistor’s leads to pass through holes in the PCB and be soldered, ensuring a stable and reliable electrical connection. This design is suitable for both prototyping and mass production processes.

Applications:

• Current Limiting:
  The 18K ohm resistor is frequently used in current-limiting circuits to protect sensitive components such as LEDs, transistors, or microcontrollers by controlling the current that flows through the circuit.

• Voltage Regulation:
  This resistor is also used in voltage regulation circuits to help stabilize voltage levels and ensure the safe operation of sensitive components.

• Voltage Divider Circuits:
  The 18K ohm resistor is often used in voltage divider circuits to scale down higher voltage levels to appropriate values for use in sensors, analog-to-digital converters (ADC), or other measurement devices.

• Signal Processing and Filtering:
  It is commonly used in signal processing and filtering applications, such as in audio amplifiers, RF circuits, and noise reduction systems, where it helps filter or stabilize signals to ensure clean and accurate output.

Physical Characteristics:

• Size:
  The 1/2 watt resistor typically measures around 1/4 inch (6.35 mm) in length and 1/8 inch (3.18 mm) in diameter, though exact dimensions may vary slightly depending on the manufacturer.

• Construction:
  The resistor has a cylindrical body with metal leads extending from both ends. These leads are inserted through holes in the PCB, where they are soldered to form a secure electrical connection.

Summary:
The 18K Ohm 1/2W 5% Through Hole Resistor is a reliable and versatile component suitable for use in a wide range of electronic circuits. With its 18K ohm resistance, 1/2 watt power rating, and 5% tolerance, this resistor is well-suited for moderate power applications. The through-hole mounting design ensures easy integration into PCBs, making it ideal for both prototyping and mass production. Whether used in current-limiting, voltage regulation, voltage divider, or signal processing circuits, this resistor provides consistent and dependable performance across various electronic applications.