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ULN2803

The ULN2803 from STMicroelectronics is a high-current Darlington transistor array with eight open-collector pairs. It offers 50V high-voltage outputs and a 500mA rated collector current per output.

✓ Total Stock: 200 pcs

$ Price Range: $0.99

ULN2803 Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Braun Electronic Components ✓ Non-Authorised Inventory information	200 pcs On Request	200 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

ULN2803 Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	STMicroelectronics
Capacitance	15pF
Current	100uA
Mounting Type	Surface Mount
Operating Temperature	-30°C to +105°C
Tape & Reel	Tape & Reel
Voltage	50V

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ULN2803 Description

Short technical summary and product information.

The ULN2803 is a high-voltage, high-current Darlington transistor array manufactured by STMicroelectronics. It contains eight open-emitter common-emitter pairs, each rated for 500 mA collector current. The device features 50V high-voltage outputs and integrated suppression diodes for inductive load driving, simplifying board layout with its input/output pin arrangement.

These arrays are designed to drive a wide variety of loads, including solenoids, relays, DC motors, LED displays, filament lamps, and thermal print-heads. The inputs are compatible with various logic types, making it versatile for different applications.

The ULN2803 is available in an SOP-18 package, suitable for surface mount applications. Its operating temperature range is -30°C to +105°C, ensuring reliability in various environmental conditions. The device's robust design and integrated features make it a suitable choice for power driver applications.

Key electrical characteristics include a typical on-state input voltage of 3V at 2V/300mA and a typical clamp diode forward voltage of 1.5V at 350mA. The output leakage current is rated at 50uA at 40V.

ULN2803 Quick Information

Product Type: Darlington Transistor Array

Canonical Name: ULN2803 High-Current Darlington Transistor Array

Subcategory: Bipolar Transistor Arrays

ULN2803 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

ULN2803 Estimated Pricing

Qty	Low	High
1+	$0.99	$0.99

Estimated market price range - modelled values for guidance only, not live distributor offers.

ULN2803 Features

Eight open-collector Darlington pairs
50V high-voltage outputs
500mA rated collector current per output
Integrated output clamp diodes
SOP-18 surface mount package

ULN2803 Applications

Relay and solenoid driving
DC motor control
LED display driving
High-power buffer applications
Thermal print-head driving

ULN2803 FAQs

7 frequently asked questions generated from this part’s specifications.

What is the maximum operating voltage of the ULN2803?

The maximum collector-emitter voltage is 50V, and the maximum input voltage is 30V.

What package is the ULN2803 available in?

The ULN2803 is available in an SOP-18 surface-mount package.

What is the operating temperature range of the ULN2803?

The operating free-air temperature range is -30°C to +105°C.

What is the maximum collector current per channel?

The rated collector current is 500mA per channel.

Does the ULN2803 include integrated clamp diodes?

Yes, the device includes clamp diodes with a reverse voltage rating of 50V.

What is the typical input current at 3.85V?

The typical input current is 0.93mA at 3.85V input.

What is the typical output leakage current?

The typical output leakage current is 50µA at 40V collector-emitter voltage.