ULN2803 8-Channel Darlington Transistor Array | High-Voltage, High-Current Driver | SMD-18

Description

The ULN2803 is a high-performance Darlington transistor array designed to act as a powerful interface between low-logic-level signals and high-power inductive loads. It consists of eight independent NPN Darlington pairs, each featuring a common-emitter, open-collector output capable of sinking up to 500mA of current.

This IC is specifically engineered for reliability in control systems, featuring integrated flyback diodes on each channel to suppress inductive voltage spikes (kickback). This makes it the ideal solution for safely driving relays, solenoids, stepper motors, and LED displays from microcontrollers like Arduino, PIC, or Raspberry Pi.

Note: Product images are shown for reference only. The actual product may vary in appearance, manufacturer marking, or logo depending on stock availability.

Features

• Eight (8) independent Darlington transistor channels
• High current capacity: 500mA per channel (peak)
• High output voltage: Rated up to 50V
• Integrated clamp diodes for inductive load protection
• TTL/CMOS compatible inputs (5V logic)
• Compact 18-pin SMD (SOIC-18) package

Benefits

• Compact Power Control: Replaces eight discrete transistor/diode circuits with a single space-saving IC.
• Circuit Safety: Built-in flyback diodes prevent damage to sensitive microcontroller pins during inductive switching.
• Versatility: Perfect for high-current industrial applications and hobbyist automation projects.

Applications

• Driving Relays, Solenoids, and Industrial Valves
• Stepper Motor and High-Current DC Motor Drivers
• Driving LED Matrices and Display Panels
• Hammer Drivers in Printing Systems
• General-Purpose Logic-to-Power Buffering

Package Includes

• 1 x ULN2803 8-Channel Darlington Transistor Array Driver IC (SMD-18 Package)

Specifications