820K Ohms (1/4 Watt) Resistor

Introduction

The 820K Ohms (1/4 Watt) resistor is a high-value resistor commonly used in electronic circuits where precise resistance is required. With a resistance of 820,000 Ohms and a power rating of 1/4 Watt, this resistor plays a critical role in various applications, including voltage regulation, signal conditioning, and biasing circuits. Its reliable performance and durability make it a preferred choice for engineers and electronic enthusiasts.

Key Specifications

• Resistance Value: 820,000 Ohms (820K 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 stable resistance performance across different temperatures

Construction and Design

The 820K Ohms resistor is typically constructed from materials such as metal film, carbon film, or metal oxide. It features a cylindrical body with color bands that indicate its resistance value and tolerance. The resistor is equipped with axial leads, suitable for through-hole mounting on printed circuit boards (PCBs) or breadboards. Its compact and lightweight design makes it easy to integrate into various circuit layouts.

Applications

The 820K Ohms resistor is used in a variety of electronic applications, including:

• High-Value Voltage Dividers: Essential for 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 maintain stable logic levels and prevent floating states, ensuring reliable operation.
• Signal Conditioning: Assists in filtering and stabilizing signals in communication and audio circuits, providing clean and accurate signal transmission with minimal noise and interference.
• Biasing Circuits: Used in biasing circuits to set appropriate bias points for transistors and other active components, optimizing performance and reducing signal distortion.
• Leakage Current Limiting: Helps limit leakage current in circuits, protecting sensitive components and ensuring stable and reliable operation.

Advantages

• Precision: Offers accurate and stable resistance values, crucial for maintaining consistent performance in various electronic applications.
• Durability: Designed to withstand temperature variations, voltage changes, and other environmental factors, making it suitable for long-term use.
• High Resistance: With a resistance value of 820K Ohms, it is ideal 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 densely packed and more open circuit layouts, fitting well into various PCB designs.

Conclusion

The 820K Ohms (1/4 Watt) resistor is an essential component for managing high resistance levels in electronic circuits. Its precise resistance value, durability, and versatility make it a valuable 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.

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