ULN2002AN Equivalent & Substitute Parts

Part Overview

The ULN2002AN is a 7-channel NPN Darlington power switch/driver manufactured by Texas Instruments, designed for relay and solenoid driving applications. It features a 1:1 input-to-output ratio with low-side output configuration, supporting loads up to 50V and 500mA per channel. The device is packaged in a 16-DIP through-hole format and is currently in Last Time Buy status, making identification of equivalent alternatives essential for ongoing design support and procurement planning.

Substiute Parts

ULN2002AN

Texas InstrumentsIn Stock: 3527ULN2002AN Datasheet

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ULN2001A

STMicroelectronicsIn Stock: 22800ULN2001A Datasheet

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ULN2002A

STMicroelectronicsIn Stock: 2363ULN2002A Datasheet

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ULN2003A

UMWIn Stock: 39129ULN2003A Datasheet

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ULN2004A

STMicroelectronicsIn Stock: 35497ULN2004A Datasheet

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ULQ2001A

STMicroelectronicsIn Stock: 2131ULQ2001A Datasheet

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ULQ2003A

STMicroelectronicsIn Stock: 18539ULQ2003A Datasheet

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ULQ2004A

STMicroelectronicsIn Stock: 2370ULQ2004A Datasheet

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TBD62004APG

Toshiba Semiconductor and StorageIn Stock: 12179TBD62004APG Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the ULN2002AN is determined by strict equivalence across the following critical parameters:

• Number of Outputs: 7 channels (fixed requirement)
• Output Type & Configuration: NPN, Low Side (functional topology)
• Voltage Rating: 50V maximum load voltage
• Current Rating: 500mA maximum output current
• Input-Output Ratio: 1:1 (signal integrity)
• Package: 16-DIP through-hole form factor (mechanical compatibility)
• Interface Type: Parallel input control

Substitute parts are grouped into two categories based on product status and availability:

Active Status Substitutes (ULN2001A, ULN2002A, ULN2004A, ULQ2001A, ULQ2003A, ULQ2004A): These parts maintain full electrical and mechanical compatibility with identical or superior operating temperature ranges (-40°C to 85°C). All are ROHS3 compliant with active manufacturing status.

Manufacturer-Recommended Alternative (TBD62004APG): Toshiba part with equivalent electrical specifications but different output type classification (N-Channel vs. NPN), suitable for applications where output topology flexibility is acceptable.

Surface Mount Alternative (ULN2003A): UMW-manufactured part with identical electrical specifications but 16-SOP surface-mount packaging, applicable only for PCB designs supporting SMD components.

Parameter Comparison

Engineering Selection Recommendations

Direct Through-Hole Replacements (Preferred)

ULN2001A, ULN2002A, and ULN2004A from STMicroelectronics provide pin-compatible substitution with active product status and extended operating temperature range to 85°C. These parts are suitable for direct board-level replacement without design modification. ULN2002A offers the closest part-number alignment to the original ULN2002AN.

Extended Temperature Capability

ULQ2001A, ULQ2003A, and ULQ2004A offer junction temperature ratings to 150°C, providing thermal margin for high-ambient or high-dissipation applications. These parts maintain identical electrical specifications and 16-DIP packaging but are categorized as discrete transistor arrays rather than integrated power drivers.

Manufacturer-Recommended Alternative

TBD62004APG from Toshiba maintains all critical electrical parameters and 16-DIP through-hole packaging. The N-Channel output type differs from the NPN classification but delivers equivalent functional performance in relay and solenoid driver circuits. This part is suitable where Toshiba component qualification is required.

Surface-Mount Option

ULN2003A from UMW provides electrical equivalence with 16-SOP surface-mount packaging. This substitution requires PCB redesign and is applicable only for new designs or boards supporting SMD component footprints.

All substitute parts carry ROHS3 compliance and EAR99 export classification matching the original part.

Frequently Asked Questions (FAQ)

Q: Can ULN2001A, ULN2002A, or ULN2004A be used as direct replacements for ULN2002AN?

A: Yes. All three parts are pin-compatible 16-DIP through-hole devices with identical electrical specifications (7 outputs, 50V, 500mA, 1:1 ratio, low-side configuration). They are manufactured by STMicroelectronics with active product status and extended operating temperature range (-40°C to 85°C). No circuit modification is required.

Q: What is the difference between ULN200xA and ULQ200xA parts?

A: Both families meet identical electrical requirements for this application. ULN parts are classified as integrated power drivers, while ULQ parts are classified as discrete transistor arrays. ULQ parts offer higher junction temperature ratings (150°C vs. 85°C). Functional performance in relay and solenoid circuits is equivalent.

Q: Is TBD62004APG a suitable substitute?

A: Yes, for applications where output type flexibility is acceptable. The TBD62004APG is Toshiba's manufacturer-recommended equivalent with identical electrical specifications and 16-DIP packaging. The N-Channel output type provides equivalent low-side switching performance in relay driver circuits.

Q: Can ULN2003A be used as a substitute?

A: ULN2003A is electrically equivalent but requires PCB redesign. It is packaged in 16-SOP surface-mount format rather than 16-DIP through-hole. This substitution is applicable only for new designs or boards with SMD component support.

Q: Why is the ULN2002AN listed as Last Time Buy?

A: Last Time Buy status indicates the manufacturer (Texas Instruments) is discontinuing production. Substitution with active-status alternatives is recommended for long-term design support and procurement continuity.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the environmental and regulatory status of the original ULN2002AN.

Q: What is the key parameter that determines substitution eligibility?

A: The combination of 7-channel output count, 50V load voltage rating, 500mA output current, 1:1 input-output ratio, low-side output configuration, and 16-DIP through-hole packaging defines the substitution domain. Parts meeting all these parameters are functionally interchangeable.