Manufacturer Part Number
ULN2802A
Manufacturer
STMicroelectronics
Introduction
The ULN2802A is a high-voltage, high-current Darlington transistor array. It is designed to interface between low-level logic circuitry and high-power loads.
Product Features and Performance
8 NPN Darlington connected transistors
Capable of handling up to 500mA per channel
Withstands up to 50V between collector and emitter
Internal clamp diodes for inductive load switching
Operates over a wide temperature range (-20°C to 150°C)
Power dissipation up to 2.25W
Product Advantages
Simplifies design of power interface circuits
Provides high-current drive capability
Suitable for driving a wide range of inductive and non-inductive loads
Protects against inductive kickback
Reliable performance across a broad temperature range
Key Technical Parameters
Collector-Emitter Voltage (Vceo): 50V
Collector Current (Ic): 500mA
Saturation Voltage (VceSat): 1.6V @ 500mA, 350mA
DC Current Gain (hFE): 1000 min @ 350mA, 2V
Quality and Safety Features
RoHS3 compliant
Designed for reliable and safe operation
Compatibility
Through-hole mounting (18-DIP package)
Suitable for various industrial, consumer, and automotive applications
Application Areas
Motor controllers
Solenoid drivers
Relay drivers
Lamp and LED drivers
Printer hammer drivers
Magnetically actuated device drivers
Product Lifecycle
The ULN2802A is an established product and is currently in production.
Replacement or upgrade options may include newer Darlington array ICs from STMicroelectronics or other manufacturers.
Key Reasons to Choose the ULN2802A
High-current driving capability (up to 500mA per channel)
Wide operating voltage range (up to 50V)
Protection against inductive kickback with internal clamp diodes
Reliable performance across a broad temperature range (-20°C to 150°C)
RoHS3 compliance for environmental sustainability
Suitable for a wide range of industrial, consumer, and automotive applications
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