390K Ohms (1/4 Watt) Resistor

Introduction

The 390K Ohms (1/4 Watt) resistor is a high-resistance component designed for various electronic applications where accurate resistance is necessary. With a resistance value of 390,000 Ohms and a power rating of 1/4 Watt, this resistor is ideal for circuits that require stable performance and precision.

Key Specifications

• Resistance Value: 390,000 Ohms (390K Ohms)
• Power Rating: 1/4 Watt (250 mW)
• Tolerance: Typically ±5% or ±1%, depending on the specific model
• Temperature Coefficient: ±100 to ±200 ppm/°C, ensuring consistent resistance performance across different temperatures

Construction and Design

The 390K Ohms resistor is typically constructed from materials like metal film, carbon film, or metal oxide. It features a cylindrical shape with color bands that indicate its resistance value and tolerance. The resistor is equipped with axial leads, making it suitable for through-hole mounting on printed circuit boards (PCBs) or breadboards. Its compact and lightweight design allows for easy integration into various circuit designs.

Applications

The 390K Ohms resistor is used in a range of electronic applications, including:

• Voltage Dividers: Ideal for use in voltage divider circuits where high resistance values are needed to scale down voltage levels for components like sensors, microcontrollers, and analog-to-digital converters.
• Pull-Up/Pull-Down Resistors: Functions as pull-up or pull-down resistors in digital circuits to ensure stable logic levels and prevent floating states, contributing to reliable circuit operation.
• Signal Conditioning: Assists in filtering and stabilizing signals in communication and audio circuits, providing clean and accurate signal transmission with minimal interference.
• Biasing Circuits: Used in biasing circuits to set appropriate operating points for transistors and other active components, optimizing circuit performance and reducing signal distortion.
• Leakage Current Limiting: Helps limit leakage current in circuits, protecting sensitive components and ensuring stable operation.

Advantages

• Precision: Offers accurate and stable resistance values, crucial for maintaining consistent performance in electronic applications.
• Durability: Designed to endure temperature variations, voltage changes, and other environmental factors, ensuring long-term reliability.
• High Resistance: With a resistance value of 390K Ohms, it is suitable for applications requiring high resistance levels, such as voltage dividers and signal conditioning.
• Compact Size: Its small and lightweight design allows for easy integration into both compact and larger circuit layouts, fitting well into various PCB designs.

Conclusion

The 390K Ohms (1/4 Watt) resistor is a vital component for managing high resistance levels in electronic circuits. Its precise resistance value, durability, and versatility make it an essential tool for engineers, hobbyists, and professionals. Whether used in voltage dividers, pull-up/pull-down configurations, signal conditioning, or biasing circuits, this resistor ensures reliable and stable performance, contributing to effective and efficient circuit design.

56 Ohms (1/4 Watt) (Pack of 10)