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Power Bipolar Transistor, 0.5A I(C), 50V V(BR)CEO, 8-Element, NPN, Silicon, Plastic/Epoxy, 18 Pin, PLASTIC, CASE 707, DIP-18

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Global Popularity

Popularity in Transistors

Popularity in Power Bipolar Transistors

Popularity by Region

Very High




  • 1. Bangladesh
  • 2. China
  • 3. United States of America
  • 4. Italy
  • 5. India
  • 6. Canada
  • 7. South Korea
  • 8. Czech Republic
  • 9. Oman
  • 10. Macedonia

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Datasheets & Reference Designs

Frequently Asked Questions (FAQ)

  • Q: How do I use the ULN2803 with Arduino?

    A: I used a Darlington ULN2803 with an Arduino to control a giant common anode 7-segment display from Evil Mad Scientist. Normal sized 7-segment displays consist of 7 rectangular leds arranged so that they can display the numbers 0-9. Lighting up one segment of a normal 7-segment display is equivalent to lighting up an LED, it requires about 3V and 20mA; this is easily accomplished by the Arduino alone. more

  • Q: Where can I find a ULN2803 pinout?

    A: ULN2803 is an 18 pin IC which will be available in various packages. The description for each pin is given below. more

  • Q: Where can I download the ULN2803 circuit schematic?

    A: ULN2803 is a High voltage, high current Transistor Array IC used especially with Microcontrollers where we need to drive high power loads. Thic IC consists of a eight NPN Darlington connected transistors with common Clamp diodes for switching the loads connected to the output. more

  • Q: How can I make a ULN2803 relay driver?

    A: 8 Channel Relay Board is a simple and convenient way to interface 8 relays for switching application in your project. Input voltage level support TTL as well as CMOS. Easy interface with Micro-ontrollers based projects and analog circuits. more

  • Q: Are there SMD packages for the ULN2803?

    A: Mounting Style: SMD/SMT more

  • Q: How can I make a ULN2803 relay board?

    A: Relays are one of the most common interfaces between a micro controller and the outside world. It provides electrical isolation between the low voltage circuits of the micro controller, and the loads. more

  • Q: Where can I find more information about the ULN2803?

    A: The ULN2003A is an array of seven NPN Darlington transistors capable of 500 mA, 50 V output. It features common-cathode flyback diodes for switching inductive loads. It can come in PDIP, SOIC, SOP or TSSOP packaging. more

  • Q: Where can I find details about the ULN2803 LED driver circuit?

    A: LED strips are the most recent trend in interior as well exterior designing. LED strips are amazing by it’s availability in various colors and simplicity in handling. Controlling LED strips using Arduino is an interesting task. more

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