The ULN2803A is a high-voltage, high-current 8-channel Darlington transistor array IC designed to interface low-power digital circuits with high-current loads. It features eight NPN Darlington pairs with common-emitter outputs and integrated flyback diodes for driving inductive loads such as relays, solenoids, motors, and lamps.
Compatible with TTL and CMOS logic levels, the ULN2803A is widely used in microcontroller-based projects, industrial automation, embedded systems, and control applications. Its built-in protection diodes simplify circuit design and improve reliability when switching inductive loads.
Features
- 8 NPN Darlington transistor outputs
- High-current sink driver outputs
- Integrated flyback diodes for inductive load protection
- Compatible with TTL and CMOS logic
- Suitable for relays, motors, LEDs, and solenoids
- DIP-18 package for easy prototyping and assembly
Applications
- Relay driver circuits
- Stepper motor and DC motor control
- LED displays and lighting control
- Industrial automation systems
- Microcontroller and Arduino projects
- Embedded control applications
| Parameter | Value |
|---|---|
| Toshiba | |
| Product Category: | Darlington Transistors |
| RoHS: | Yes |
| Octal | |
| NPN | |
| 50 V | |
| 500 mA | |
| Through Hole | |
| PDIP-18 | |
| - 20 C | |
| + 85 C | |
| ULN2803A | |
| Tube | |
| Brand: | Toshiba |
| Continuous Collector Current: | 500 mA |
| Product Type: | Darlington Transistors |
| File Name | Action |
|---|---|
| ULN2803A Datasheet | Download |
