ULN2003BDR Equivalent & Substitute Parts

Part Overview

The ULN2003BDR is a Power Switch/Driver IC manufactured by Texas Instruments, designed for relay and solenoid driving applications. This 7-channel Darlington array operates with a 1:1 input-to-output ratio and supports a maximum load voltage of 50V with 500mA output current per channel. The device is currently in Last Time Buy status, making identification of active equivalent parts essential for ongoing design support and procurement planning.

Substiute Parts

ULN2003BDR

Texas InstrumentsIn Stock: 50296ULN2003BDR Datasheet

Current PartRFQ

ULN2003AIDR

Texas InstrumentsIn Stock: 138996ULN2003AIDR Datasheet

MFR RecommendedRFQ

TBD62003AFWG,EL

Toshiba Semiconductor and StorageIn Stock: 797TBD62003AFWG,EL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ULN2003BDR is determined by the following critical parameters:

• Number of Outputs: Must be 7 channels
• Ratio - Input:Output: Must maintain 1:1 configuration
• Output Configuration: Must be Low Side
• Voltage - Load (Max): Must support minimum 50V
• Current - Output (Max): Must support minimum 500mA
• Package / Case: Must be compatible with 16-SOIC footprint
• Mounting Type: Must be Surface Mount
• RoHS Status: Must be ROHS3 Compliant

The ULN2003BDR has two qualified substitutes that meet these criteria: the ULN2003AIDR (Texas Instruments, Active status) and the TBD62003AFWG,EL (Toshiba Semiconductor and Storage, Active status). Both maintain identical electrical specifications and package compatibility while offering improved availability through Active product status.

Parameter Comparison

Engineering Selection Recommendations

The ULN2003AIDR is the primary recommended substitute for the ULN2003BDR. Both devices are manufactured by Texas Instruments, share identical electrical and thermal specifications, and maintain the same 16-SOIC package footprint. The ULN2003AIDR holds Active product status with significantly higher inventory availability (138,900 pcs vs. 50,200 pcs), providing superior long-term supply chain stability. Both devices are ROHS3 Compliant and carry identical compliance certifications.

The TBD62003AFWG,EL from Toshiba Semiconductor and Storage provides an alternative substitute with equivalent electrical performance across all critical parameters. This device maintains the same 50V load voltage rating, 500mA output current, and 16-SOIC package compatibility. The primary distinction is the output type (N-Channel vs. Darlington) and a reduced operating temperature range (-40°C ~ 85°C vs. -40°C ~ 105°C). This device is also ROHS3 Compliant and holds Active product status. Inventory availability is lower at 750 pcs.

For applications requiring the full -40°C ~ 105°C operating temperature range, the ULN2003AIDR is the appropriate selection. For applications with operating temperature requirements within -40°C ~ 85°C, both the ULN2003AIDR and TBD62003AFWG,EL are suitable.

Frequently Asked Questions (FAQ)

Q: Can the ULN2003AIDR directly replace the ULN2003BDR in existing designs?

A: Yes. The ULN2003AIDR is a direct substitute. Both devices share identical electrical specifications, thermal ratings, and 16-SOIC package footprint. No circuit modifications are required.

Q: What is the key difference between the ULN2003AIDR and TBD62003AFWG,EL?

A: The primary difference is the output type: the ULN2003AIDR uses Darlington output configuration, while the TBD62003AFWG,EL uses N-Channel output configuration. Both maintain identical voltage and current ratings. The TBD62003AFWG,EL has a reduced operating temperature range of -40°C ~ 85°C compared to -40°C ~ 105°C for the ULN2003AIDR.

Q: Are all three parts compatible with the same PCB layout?

A: Yes. All three devices use the 16-SOIC (0.154", 3.90mm Width) package and are Surface Mount components. PCB footprints are identical.

Q: Why is the ULN2003BDR in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer is discontinuing this specific part number. The ULN2003AIDR represents the active continuation of this product line from Texas Instruments.

Q: Are there compliance differences between the three parts?

A: No. All three devices are ROHS3 Compliant, REACH Unaffected, and carry identical regulatory classifications (ECCN: EAR99).

Q: Which substitute should be selected for new designs?

A: The ULN2003AIDR is recommended for new designs. It maintains full compatibility with the original ULN2003BDR specifications while offering Active product status and superior inventory availability.