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Darlington Transistors Seven NPN Array

ULQ2003A General Description

The ULx200xA devices are high-voltage, high-current Darlington transistor arrays. Each consists of seven NPN Darlington pairs that feature high-voltage outputs with common-cathode clamp diodes for switching inductive loads.

The collector-current rating of a single Darlington pair is 500 mA. The Darlington pairs can be paralleled for higher current capability. Applications include relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line drivers, and logic buffers. For 100-V (otherwise interchangeable) versions of the ULx2003A devices, see the SLRS023 data sheet for the SN75468 and SN75469 devices.

The ULN2002A device is designed specifically for use with 14-V to 25-V PMOS devices. Each input of this device has a Zener diode and resistor in series to control the input current to a safe limit. The ULx2003A devices have a 2.7-kΩ series base resistor for each Darlington pair for operation directly with TTL or 5-V CMOS devices.

The ULx2004A devices have a 10.5-kΩ series base resistor to allow operation directly from CMOS devices that use supply voltages of 6 V to 15 V. The required input current of the ULx2004A device is below that of the ULx2003A devices, and the required voltage is less than that required by the ULN2002A device.




Key Features

  • Seven Darlington per package
  • Extended temperature range: -40 to 105 °C
  • Output current 500 mA per driver (600 mA peak)
  • Output voltage 50 V
  • Automotive Grade product in SO16 package
  • Integrated suppression diodes for inductive loads
  • Outputs can be paralleled for higher current
  • TTL/CMOS/PMOS/DTL compatible inputs
  • Inputs pinned opposite outputs to simplify layout


  • Power Conversion Circuit
  • Reverse Battery Protection
  • Gate Driving Circuit
  • Protection and Free-Wheeling


Category Discrete Semiconductor ProductsTransistorsBipolar (BJT)Bipolar Transistor Arrays Series -
Transistor Type 7 NPN Darlington Current - Collector (Ic) (Max) 500mA
Voltage - Collector Emitter Breakdown (Max) 50V Vce Saturation (Max) @ Ib, Ic 1.6V @ 500µA, 350mA
Current - Collector Cutoff (Max) - DC Current Gain (hFE) (Min) @ Ic, Vce 1000 @ 350mA, 2V
Power - Max - Frequency - Transition -
Operating Temperature 150°C (TJ) Mounting Type Through Hole
Base Product Number ULQ2003

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Ratings and Reviews

J**s 03/03/2023

High speed charge will be well

D**o 12/08/2022

Received in 22 days in good condition. It's how se d is cribe. I haven't tried it yet.

J**n 03/22/2022

We drove 5 days without track.If the timing is not critical, you can take. Ims are brand new.

C**n 03/05/2020

Great thing. Binds instantly, good stereo signal transmission. True maximum distance of 5 m, but for me it is enough.



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ULQ2003A Datasheet PDF

Preliminary Specification ULQ2003A PDF Download

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