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ULN2803 AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

ULN2803 product

ULN2803

Power Distribution Switches

Darlington arraylow-side driver50 V500 mAintegrated clamp diodesSOP-18

ULN2803 is an 8-channel Darlington low-side driver for switching inductive or resistive loads from logic-level control signals.

Best for

  • Relay and solenoid low-side switching
  • Lamp and LED load driving
  • Stepper and DC motor interface stages

Avoid if

  • Low voltage drop or high efficiency is required
  • Load current or total dissipation exceeds package capability
  • A high-side switch is needed

Check before use

  • Connect pin 9 to ground as the common emitter.
  • Connect COM pin 10 to the positive load supply when using the internal clamp diodes.
  • Validate temperature and channel-count information against the manufacturer before production.

Key specifications

Outputs
8 NPN Darlington low-side channels
Output voltage
50 V max
Peak channel current
500 mA max
Package
SOP-18, 18 pins

Compliance & Environment

RoHS
-
REACH
-
MSL
-
ECCN
-
HTSUS
-

Application

Relay and solenoid driversStepper motor drive stagesLamp and LED load control

Datasheet

536e54a5b1ff2f0157e719b3b0a5fd7d.pdf

800 KB

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CAD Models

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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

ULN2803 is an 18-pin array of eight NPN Darlington low-side transistor drivers. Its outputs sink current to the common emitter pin and include clamp diodes for inductive loads.