Description

The 390K Ohm 1/2W 5% Through Hole Resistor is a reliable and versatile electronic component commonly used in various applications requiring resistance values of 390K ohms (390,000 ohms). It has a 1/2 watt (0.5W) power rating and a 5% tolerance, making it suitable for moderate power circuits. The through-hole mounting type ensures a secure and stable connection to printed circuit boards (PCBs), ideal for both prototype and production environments.

Key Specifications:

• Resistance: 390K ohms (390,000 ohms)

  • The 390K ohm resistor is used in applications that require a higher resistance value to control current flow, divide voltages, or stabilize signal levels in a wide variety of circuits.

• Power Rating: 1/2 watt (0.5W)

  • With a 0.5 watt power rating, this resistor is designed for moderate power circuits, providing efficient power dissipation without excessive heat buildup.

• Tolerance: ±5%

  • The 5% tolerance means that the actual resistance value could vary by 5% from the nominal value. For the 390K ohm resistor, the actual resistance could range from 370,500 ohms to 409,500 ohms.

• Mounting Type: Through-hole

  • The through-hole design ensures that the resistor's metal leads pass through holes in the PCB, where they are soldered, providing a secure and reliable electrical connection. This mounting style is commonly used in both prototype and mass production designs.

Applications:

• Current Limiting:
  The 390K ohm resistor is ideal for limiting current in sensitive components such as LEDs, microcontrollers, and other electronic devices, ensuring they do not receive more current than they can handle.

• Voltage Regulation:
  This resistor is often used in voltage regulation circuits, helping maintain stable voltage levels by controlling the flow of current and preventing excessive voltage from reaching sensitive components.

• Voltage Divider Circuits:
  The 390K ohm resistor is frequently used in voltage divider circuits to scale down input voltage to a lower, more manageable level for devices such as sensors, microcontrollers, and analog-to-digital converters (ADC).

• Signal Processing and Filtering:
  This resistor is commonly used in signal processing applications, where it helps stabilize and filter electrical signals in systems like audio amplifiers, radio frequency (RF) circuits, and noise filtering circuits.

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, although the 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 designed to be inserted into PCB holes and soldered for a stable electrical connection.

Summary:
The 390K Ohm 1/2W 5% Through Hole Resistor is a reliable and versatile component suitable for moderate power applications. With a 390K ohm resistance, 1/2 watt power rating, and 5% tolerance, this resistor is ideal for voltage regulation, current limiting, voltage division, and signal processing applications. The through-hole mounting design ensures a secure and stable connection in PCBs, making it perfect for both prototyping and production. This resistor provides consistent performance and plays a key role in ensuring the proper functioning of various electronic circuits.