1kΩ Resistor

The most popular resistor value in digital electronics

E12 Series
±5%, ±1% Tolerance
0.25W, 0.5W Power
Color Code Configurations

3-Band Configuration

1st2nd×

3-band: Brown-Black-Red

Brown
Black
Red

4-Band Configuration

1st2nd×±

4-band: Brown-Black-Red-Gold (±5%)

Brown
Black
Red
Gold

5-Band Configuration

1st2nd3rd×±

5-band: Brown-Black-Black-Red-Brown (±1%)

Brown
Black
Black
Red
Brown

6-Band Configuration

1st2nd3rd×±TC

6-band: Brown-Black-Black-Red-Brown-Brown (±1%, 100ppm/°C)

Brown
Black
Black
Red
Brown
Brown
Practical Applications

Pull-up Resistors

Standard pull-up value for digital inputs and open-drain outputs

Base Resistors

Common base resistor value for transistor switching circuits

Voltage Dividers

Frequently used in voltage divider networks

General Digital Circuits

Universal resistor for digital electronics projects

Detailed Information

The 1kΩ resistor is arguably the most important and widely used resistor value in electronics. It's the go-to choice for pull-up resistors in digital circuits, base resistors for transistors, and countless other applications. Its popularity stems from providing a good balance between current limiting and power consumption, making it suitable for most digital logic applications.

💡 Pro Tips

  • Most common resistor in digital circuits
  • Excellent for learning electronics
  • Standard pull-up value for most applications
  • Good balance of current and power consumption
Specifications
Resistance:
1
Tolerance:±5%, ±1%
Power Rating:0.25W, 0.5W
Temp. Coeff.:±100 ppm/°C
Voltage Rating:Up to 250V
Series:E12
Circuit Calculations
Current At5 V:
5mA
Power At5 V:
0.025W
Pull Up Current:
~5mA

Why Choose 1 Resistors?

Key Benefits

  • Standard E12 series value for universal compatibility
  • Available in multiple tolerance and power ratings
  • Cost-effective and widely available
  • Suitable for both hobbyist and professional applications

Technical Advantages

  • Stable performance across temperature ranges
  • Low noise characteristics for sensitive circuits
  • Multiple package sizes available
  • Compatible with automated assembly processes