Description

The 3K9 Ohm (3.9K) 1/2W 5% Through Hole Resistor is a widely used electronic component designed to provide specific resistance values in circuits that require current limiting, voltage division, and signal conditioning. With a resistance value of 3.9K ohms (3,900 ohms), a power rating of 1/2 watt (0.5W), and a 5% tolerance, this resistor is ideal for use in moderate power applications. The through-hole mounting style allows for easy and secure integration into printed circuit boards (PCBs), making it a perfect choice for both prototyping and mass production.

Key Specifications:

• Resistance: 3.9K ohms (3,900 ohms)

  • The 3.9K ohm resistor is often used in applications where a moderate resistance is needed to control current flow or scale voltage. It is frequently utilized in voltage divider circuits, signal processing, and current limiting applications.

• Power Rating: 1/2 watt (0.5W)

  • With a 1/2 watt power rating, this resistor can safely dissipate up to 0.5 watts of power without overheating, making it suitable for low-to-medium power circuits.

• Tolerance: ±5%

  • The 5% tolerance means that the actual resistance value may vary by 5% from the nominal value. For the 3.9K ohm resistor, the actual resistance could range from 3,705 ohms to 4,095 ohms.

• Mounting Type: Through-hole

  • The through-hole mounting type allows the resistor’s leads to pass through holes in a PCB, where they are soldered to create a secure and stable electrical connection. This mounting style is ideal for both prototyping and mass production in PCBs.

Applications:

• Current Limiting:
  The 3.9K ohm resistor is commonly used in current-limiting applications, such as in circuits with LEDs or other sensitive components, to ensure that the current does not exceed safe levels.

• Voltage Regulation:
  This resistor is often used in voltage regulation circuits to help stabilize and control the voltage levels supplied to sensitive components.

• Voltage Divider Circuits:
  The 3.9K ohm resistor is used in voltage divider circuits to reduce or scale down voltage levels for sensors, ADCs (Analog-to-Digital Converters), or measurement devices.

• Signal Processing and Filtering:
  It is also used in signal conditioning and filtering applications, where it helps to stabilize signals, filter out noise, and provide clean output signals for further processing.

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. Dimensions may vary slightly depending on the manufacturer.

• Construction:
  The resistor has a cylindrical body with metal leads extending from both ends. These leads pass through holes in the PCB and are soldered to ensure a stable electrical connection.

Summary:
The 3K9 Ohm (3.9K) 1/2W 5% Through Hole Resistor is a dependable and versatile electronic component that is widely used in applications requiring current regulation, voltage division, and signal processing. With its 3.9K ohm resistance, 1/2 watt power rating, and 5% tolerance, this resistor is suitable for low-to-medium power circuits. The through-hole mounting design makes it easy to integrate into PCBs, ensuring a secure connection in both prototype and mass-production applications. Whether used for current limiting, voltage regulation, or signal filtering, this resistor delivers reliable performance across various electronic systems.