391K Ohm Resistor 1/4 Watt (Pack of 10)

The 391K Ohm 1/4 Watt Resistor is a fixed-value passive electronic component used to control current flow, divide voltage, bias transistors, and stabilize signals in electronic circuits. With a resistance value of 391,000 ohms (391KΩ) and a power rating of 0.25 watts (1/4W), it is widely used in low-current and high-impedance applications such as embedded systems, Arduino projects, sensor circuits, and educational electronics experiments.

Resistors are fundamental components in electronics that ensure proper voltage and current regulation for safe and stable circuit operation. The 391KΩ resistor is commonly used in voltage divider networks, pull-up and pull-down resistor configurations, transistor biasing circuits, RC timing circuits, signal conditioning applications, and sensor interface circuits. Its high resistance value makes it suitable for precision low-current applications and timing-related circuit designs.

Manufactured using high-quality carbon film or metal film technology, these resistors offer stable resistance values, low noise performance, and reliable long-term durability. Their standard through-hole axial-lead design allows easy installation on breadboards, prototype boards, and printed circuit boards (PCBs), making them ideal for both prototyping and permanent circuit assembly.

Since the resistor is non-polarized, it can be connected in either direction without affecting circuit performance, making circuit design simple and flexible.

Key Features

• Resistance Value: 391K Ohms (391,000Ω)

• Power Rating: 1/4 Watt (0.25W)

• Fixed resistor type

• Non-polarized component

• High resistance for low-current applications

• Stable and accurate resistance value

• Low noise characteristics

• Durable and reliable construction

• Easy installation on breadboards and PCBs

Technical Specifications

• Resistance: 391KΩ

• Power Rating: 0.25W (1/4 Watt)

• Tolerance: Typically ±5% (may vary by manufacturer)

• Type: Carbon Film or Metal Film

• Mounting Type: Through-hole

• Lead Type: Axial leads

Working Principle

A resistor limits the flow of electrical current in a circuit. According to Ohm’s Law (V = IR), it creates a voltage drop proportional to the current passing through it. The 391KΩ resistor is commonly used in circuits requiring precise voltage division, signal stabilization, and controlled low-current operation.

Applications

• Arduino and microcontroller projects

• Pull-up and pull-down resistor networks

• Voltage divider circuits

• RC timing circuits

• Transistor biasing applications

• Sensor interface circuits

• Signal conditioning systems

• Embedded system development

• Electronics prototyping

• Educational and laboratory experiments

• Consumer electronics repair

• Industrial control systems

Advantages

• Reliable current and voltage control

• Stable electrical performance

• Long operational lifespan

• Easy installation and replacement

• Compact and lightweight design

• Cost-effective electronic component

• Suitable for students, hobbyists, and professionals

• Compatible with breadboards and PCBs

Package Contents

• 10 × 391K Ohm 1/4 Watt Resistors

The 391K Ohm 1/4 Watt Resistor (Pack of 10) is a reliable and versatile electronic component that provides accurate voltage division, signal conditioning, and current regulation, making it essential for electronics learning, prototyping, repair, and embedded system development.