ULN2801A The STMicroelectronics ULN2801A is an 8-channel NPN Darlington bipolar transistor array designed for 50V applications with a 500mA current rating. It is available in a through-hole 18-DIP package.
Mfr Part #:

ULN2801A

Available from 4 distributors
Mfr Name: STMicroelectronics
STMicroelectronics
The STMicroelectronics ULN2801A is an 8-channel NPN Darlington bipolar transistor array designed for 50V applications with a 500mA current rating. It is available in a through-hole 18-DIP package.
✓ Total Stock: 8,959 pcs
$ Price Range: $0.99

ULN2801A Available from 4 distributors

✓ Authorised
✓ Non-Authorised

ULN2801A Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
DC Current Gain (hFE) (Min) @ Ic, Vce
Mounting Type
Operating Temperature
Power
Supplier Device Package
Supplier Package
Transistor Type
Vce Saturation (Max) @ Ib, Ic
Voltage

ULN2801A Description

Short technical summary and product information.

The STMicroelectronics ULN2801A is an 8-channel NPN Darlington bipolar transistor array. This component is rated for a maximum voltage of 50V and a continuous current of 500mA per channel, with a power dissipation of 2.25W. It features a high DC current gain (hFE) of 1000 at 350mA and 2V, and a Vce saturation of 1.6V maximum at 500µA and 350mA.

 

Designed for ease of integration, the ULN2801A utilizes a through-hole mounting type and comes in an 18-DIP package, specifically 18-DIP (0.300", 7.62mm). The operating temperature range is from -20°C to 150°C (TJ). This transistor array is suitable for applications requiring the driving of high-power loads from low-level logic signals.

 

Compliance information indicates RoHS3 compliance, Moisture Sensitivity Level 1, and REACH unaffected status. However, these compliance details are based on available database information and may require verification.

ULN2801A Quick Information

Product Type: Bipolar Transistor Array
Canonical Name: STMicroelectronics ULN2801A Transistor Array
Subcategory: BJT Arrays

ULN2801A Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

ULN2801A Estimated Pricing

Qty Low High
1+ $0.99 $0.99

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

ULN2801A Features

  • Eight NPN Darlington transistor channels.
  • Rated for 50V output voltage.
  • Handles up to 500mA continuous current.
  • Through-hole mounting in 18-DIP package.
  • Wide operating temperature range.

ULN2801A Applications

  • Driving relays and solenoids.
  • Controlling stepper motors.
  • Interfacing with logic circuits.
  • High-current switching applications.

ULN2801A FAQs

3 frequently asked questions generated from this part’s specifications.
What is the minimum DC current gain (hFE)?

Minimum 1000 at Ic=350mA, Vce=2V.

How many Darlington transistors are in the ULN2801A?

8 NPN Darlington pairs.

What is the maximum collector-emitter saturation voltage?

1.6V at Ib=500µA, Ic=350mA.

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