Bipolar (BJT) Transistor Array 8 NPN Darlington 50V 500mA Surface Mount 18-SOIC
The ULN2803ADW is a high-voltage, high-current Darlington transistor array designed for interfacing low-level digital logic circuits with high-power loads. The device integrates eight NPN Darlington pairs with common-emitter outputs and suppression diodes for inductive load driving. It is commonly used in relay drivers, LED matrix control, solenoid actuation, motor drivers, lamp control, and industrial automation interfaces.
The integrated clamp diodes enable direct driving of inductive loads without requiring additional external protection circuitry. The input stage is compatible with standard TTL and CMOS logic levels, making the device suitable for microcontroller, FPGA, and processor-based systems.
The ULN2803ADW provides compact multi-channel switching capability in a wide-body SOIC surface-mount package optimized for automated assembly and high-density PCB layouts.
Key Features
Eight-channel NPN Darlington transistor array
High-current sink driver outputs
Integrated flyback suppression diodes
TTL and CMOS compatible inputs
Open-collector outputs
Suitable for inductive and resistive loads
High output voltage capability
Parallel output operation supported for increased current handling
Wide operating voltage range
Surface-mount SOIC wide-body package
Industrial and embedded control application support
Electrical Characteristics
Darlington transistor output configuration
High DC current gain
Low input current requirement
Common-cathode clamp diode structure
Open-collector output topology
Logic-level input compatibility
High-voltage output tolerance
Multi-channel simultaneous switching support
Applications
Relay and solenoid drivers
Stepper motor interfaces
LED and lamp driving
Industrial automation systems
PLC output stages
Embedded control systems
Printer and actuator control
Automotive electronics
Logic buffer and level shifting applications
Package Information
Package Type: SOIC Wide Body
Mounting Type: Surface Mount
Multi-pin integrated driver package
RoHS compliant options available
