The 1M Ohm 1/4 Watt Carbon Film Resistor is a high-resistance passive component essential for timing, biasing, and protection circuits. At Electrapac, we provide these high-stability resistors to ensure your precision electronics operate with minimal noise and maximum reliability.

Product Overview

A 1MΩ (One Million Ohm) resistor is commonly used in applications where very low current flow is required or where a high input impedance is necessary. These resistors feature a carbon film deposited on a ceramic carrier, offering excellent long-term stability and low electrical noise. With a ±5% tolerance, they are perfect for general-purpose hobbyist projects and industrial prototyping alike.

Key Features for Electrapac Customers

• Standard 1/4 Watt Size: The most popular power rating for breadboard prototyping and DIY PCB assembly. It handles standard signal-level heat dissipation with ease.

• High Input Impedance: Ideal for pull-up or pull-down applications where you want to minimize the current draw from your microcontroller pins.

• Clear Color Coding: Features standard 4-band color coding for quick identification in your component drawer.

• Tinned Lead Wires: The oxygen-free copper leads are pre-tinned, making them incredibly easy to solder or plug into the breadboards available at www.electrapac.com.

• Wide Operating Temperature: Designed to perform consistently in environments ranging from -55°C to +155°C.

Identifying Your Resistor

To identify a 1M Ohm resistor using the color bands:

1. Band 1 (Brown): Digit 1

2. Band 2 (Black): Digit 0

3. Band 3 (Green): Multiplier 10⁵— this adds 5 zeros.

4. Band 4 (Gold): ±5% Tolerance

Primary Applications

• Timing Circuits: Used with capacitors in 555 Timer circuits to create long delay intervals (RC Time Constants).

• Operational Amplifiers: Setting the gain or input impedance in audio and signal processing circuits.

• Pull-up/Pull-down: Ensuring digital pins stay at a known state (High/Low) while drawing almost zero current.

• Voltage Dividers: Used in high-ratio dividers to measure high voltages with low-power microcontrollers.

• Sensor Interfacing: Perfect for use with Piezo sensors or high-impedance pH probes.

We source our 1MΩ Carbon Film Resistors with high-quality ceramic cores to prevent resistance drifting over time. At www.electrapac.com, we provide the small parts that ensure your complex circuits remain stable and accurate.