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ULN2803A AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

ULN2803A product

ULN2803A

Transistors - Bipolar (BJT) - Arrays

Darlington ArrayDriver IC5V Logic

The ULN2803A is a high-voltage, high-current Darlington transistor array designed for driving inductive loads like relays, solenoids, and lamps using 5V TTL or CMOS logic.

Best for

  • Relay driving
  • Solenoid control
  • LED display driving

Avoid if

  • High-speed switching applications (due to Darlington delay times)

Check before use

  • Thermal dissipation limits when multiple outputs are active

Key specifications

Channels
8
Max Output Current
500 mA
Max Output Voltage
50 V
Logic Level
5 V TTL/CMOS

Compliance & Environment

RoHS
ROHS3 Compliant
REACH
-
MSL
-
ECCN
-
HTSUS
-

Application

Industrial ControlPower Switching

Datasheet

d1cfcceb2bfb7d7343bf7573cf6037a8.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for ULN2803A: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

EDA Symbol
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PCB Footprint
Land pattern for PCB layout
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3D Model
STEP file for mechanical design
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KiCad Library
Verified KiCad 8 symbol, footprint, and 3D model
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Where to Buy

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Alternative components

Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.

Design and risk insights

Questions & answers

It is an 8-channel Darlington transistor array with common emitters and integral suppression diodes, designed to interface low-level logic signals with high-power loads.