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Texas Instruments ULN2003AIDR — Analog & Data Acquisition
Texas Instruments

ULN2003AIDR 7-Channel Darlington Driver, 500 mA, 50 V

MPNULN2003AIDR
End of Life

Texas Instruments ULN2003AIDR, Series ULx200xA, 7-channel NPN Darlington relay/solenoid driver, 500 mA per channel, 50 V load, inverting input, parallel interface, 16-SOIC package, -40°C to 105°C.

$0.71Ref. price · indicative, final on quote
ULN2003AIDR datasheet
Packaging16-SOIC (0.154", 3.90mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

ULN2003AIDR Technical Specifications
ParameterValue
SeriesULx200xA
Input typeInverting
Output typeNPN
Switch typeRelay, Solenoid Driver
Mounting typeSurface Mount
Voltage - load50V (Max)
Voltage - supply (Vcc (Vdd))Not Required
Current - output500mA
Number of outputs7
InterfaceParallel
Operating temperature-40°C ~ 105°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
Case16-SOIC (0.154\", 3.90mm Width)
Output configurationLow Side
Ratio - Input:Output1:1

Product details

Where it fits — applications and environments

This part is a staple in industrial control panels, PLC output stages, relay logic replacement, motor-drive interface boards, and appliance control PCBs. The -40°C to 105°C operating temperature range suits it for factory-floor automation, outdoor telecom cabinets, and under-hood automotive environments where ambient heat is a factor. It is not rated for military or avionics temperature extremes, but covers the industrial and extended-commercial band well.

Lifecycle and sourcing reality

It is ROHS3 compliant.

Frequently asked questions

What is the maximum output current per channel for ULN2003AIDR?

The total package dissipation limits how many channels can run at full current simultaneously — derate for ambient temperature and PCB copper area.

What is the ULN2003AIDR used for?

It is a 7-channel Darlington driver for relays, solenoids, stepper motors, and other inductive loads. Common in PLC outputs, industrial control panels, and appliance logic boards. The built-in flyback diodes simplify driving inductive loads from logic-level signals.

What is the difference between ULN2003AIDR and ULN2003?

The ULN2003AIDR is the surface-mount SOIC-16 version of the same die. The base ULN2003 is typically in a DIP-16 through-hole package. Electrical ratings (500 mA per channel, 50 V load, inverting inputs) are identical. The 'A' suffix indicates the industrial temperature range (-40°C to 105°C) versus the commercial 0°C to 70°C of the standard ULN2003.

What is the closest pin-compatible alternative to ULN2003AIDR in this component family?

The ULN2003AIDR is pin-compatible with all SOIC-16 ULN2003 variants from TI and second-source manufacturers (e.g., STMicroelectronics, NXP). The ULN2004AIDR is the same package and pinout but with higher input impedance for CMOS logic instead of TTL. For through-hole designs, the ULN2003AIN (DIP-16) is the same die.