ULN2805A - STMicroelectronics

Manufacturer Part Number

ULN2805A

Manufacturer

STMicroelectronics

Introduction

The ULN2805A is a high-voltage, high-current Darlington transistor array capable of driving inductive loads such as relays, solenoids, and stepping motors.

Product Features and Performance

8 NPN Darlington transistors in a single package

Capable of driving inductive loads up to 500mA per channel

Voltage rating of up to 50V between collector and emitter

Low collector-emitter saturation voltage of 1.6V at 350mA

High DC current gain of 1000 at 350mA, 2V

Operating temperature range of -20°C to 150°C

Product Advantages

Compact 18-DIP package design

Simplified circuit design by integrating multiple transistors

Efficient power handling for driving high-current loads

Wide operating temperature range

Key Technical Parameters

Manufacturer Part Number: ULN2805A

Package: 18-DIP (0.300", 7.62mm)

Operating Temperature: -20°C to 150°C

Power Dissipation: 2.25W

Collector-Emitter Breakdown Voltage: 50V

Collector Current (Max): 500mA

Collector-Emitter Saturation Voltage: 1.6V @ 500A, 350mA

Transistor Type: 8 NPN Darlington

Quality and Safety Features

RoHS3 compliant

Designed for reliable and safe operation

Compatibility

The ULN2805A is compatible with a wide range of control systems and industrial applications requiring high-current switching.

Application Areas

Relay and solenoid driving

Stepper motor control

Industrial automation and control systems

Home appliances and consumer electronics

Product Lifecycle

The ULN2805A is an actively supported product by STMicroelectronics and is not nearing discontinuation. Replacement or upgrade options are available for this device.

Several Key Reasons to Choose This Product

High-performance Darlington transistor array for driving inductive loads

Compact and space-saving 18-DIP package design

Excellent power handling and efficiency with up to 500mA per channel

Wide operating temperature range of -20°C to 150°C

RoHS3 compliance for environmental safety

Proven reliability and compatibility with various control systems

Availability of replacement and upgrade options for long-term support