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BA12003BF-E2 Equivalent & Substitute Parts
Part Overview
The BA12003BF-E2 is a 7/0 Darlington Array interface IC manufactured by Rohm Semiconductor in a 16-SOP surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The Darlington array configuration provides seven independent driver outputs suitable for relay, solenoid, and general switching applications. Identification of compatible alternatives ensures design continuity and supply chain reliability.
Substiute Parts
Key Parameters
| Parameter | BA12003BF-E2 |
|---|---|
| Manufacturer | Rohm Semiconductor |
| Type | Darlington Array |
| Number of Drivers/Receivers | 7/0 |
| Package / Case | 16-SOIC (0.173", 4.40mm Width) |
| Supplier Device Package | 16-SOP |
| Mounting Type | Surface Mount |
| Operating Temperature | -25°C ~ 75°C |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution of the BA12003BF-E2 is determined by the following critical parameters:
- Output Configuration: 7 independent driver outputs (7/0 Darlington array)
- Package Compatibility: 16-SOP or 16-SOIC surface mount package
- Output Type: Darlington or equivalent power switch configuration
- Current Rating: 500mA output capability
- Voltage Rating: 50V maximum load voltage
- Mounting Type: Surface mount only
- Compliance: ROHS3 compliant, MSL 1 rating
Substitute parts are grouped into two categories: direct Rohm Semiconductor variants and cross-manufacturer alternatives from Texas Instruments and Toshiba that maintain functional and electrical equivalence within the specified parameters.
Parameter Comparison
| Parameter | BA12003BF-E2 | BA12003DF-ZE2 | TBD62003AFG,EL | TBD62003AFWG,EL | ULN2003AD | ULN2003ADR | ULN2003AID | ULN2003AIDR | ULN2003AIDRE4 | ULN2003ANS | ULN2003ANSR |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Rohm | Rohm | Toshiba | Toshiba | TI | TI | TI | TI | TI | TI | TI |
| Type | Darlington Array | Darlington Array | Power Switch N-Channel | Power Switch N-Channel | Darlington | Darlington | Darlington | Darlington | Darlington | Darlington | Darlington |
| Number of Outputs | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Output Configuration | Low Side | Low Side | Low Side | Low Side | Low Side | Low Side | Low Side | Low Side | Low Side | Low Side | Low Side |
| Voltage - Load (Max) | Not specified | Not specified | 50V | 50V | 50V | 50V | 50V | 50V | 50V | 50V | 50V |
| Current - Output (Max) | Not specified | Not specified | 500mA | 500mA | 500mA | 500mA | 500mA | 500mA | 500mA | 500mA | 500mA |
| Operating Temperature | -25°C ~ 75°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 70°C | -40°C ~ 70°C | -40°C ~ 105°C | -40°C ~ 105°C | -40°C ~ 105°C | -40°C ~ 70°C | -40°C ~ 70°C |
| Package / Case | 16-SOIC (0.173", 4.40mm) | 16-SOIC (0.173", 4.40mm) | 16-SOIC (0.173", 4.40mm) | 16-SOIC (0.154", 3.90mm) | 16-SOIC (0.154", 3.90mm) | 16-SOIC (0.154", 3.90mm) | 16-SOIC (0.154", 3.90mm) | 16-SOIC (0.154", 3.90mm) | 16-SOIC (0.154", 3.90mm) | 16-SOIC (0.209", 5.30mm) | 16-SOIC (0.209", 5.30mm) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Obsolete | Not For New Designs | Active | Active | Last Time Buy | Active | Last Time Buy | Active | Obsolete | Last Time Buy | Active |
Engineering Selection Recommendations
Direct Rohm Semiconductor Substitute: BA12003DF-ZE2 provides the closest functional match as a Rohm Semiconductor variant with identical 7-output Darlington array configuration and 16-SOP package. This part extends the operating temperature range to -40°C ~ 85°C and is rated "Not For New Designs," indicating limited future availability.
Texas Instruments ULN2003 Series (Recommended for New Designs): The ULN2003ADR and ULN2003AIDR represent active product status alternatives with proven long-term availability. ULN2003AIDR offers the widest operating temperature range (-40°C ~ 105°C) and is actively manufactured. Both maintain the 7-output Darlington configuration, 50V/500mA ratings, and ROHS3 compliance. Package width variations (0.154" vs. 0.173") require PCB layout verification.
Toshiba TBD62003 Series: TBD62003AFG,EL and TBD62003AFWG,EL provide active product alternatives with equivalent electrical specifications. These parts are classified as Power Switch/Driver components rather than traditional Darlington arrays but maintain functional equivalence for relay and solenoid driver applications.
Product Status Considerations:
- Obsolete parts (BA12003BF-E2, ULN2003AIDRE4) have no guaranteed future supply
- Last Time Buy parts (ULN2003AD, ULN2003AID, ULN2003ANS) have limited remaining inventory
- Active parts (ULN2003ADR, ULN2003AIDR, ULN2003ANSR, TBD62003AFG,EL, TBD62003AFWG,EL) are recommended for new designs
Frequently Asked Questions (FAQ)
Q: Can BA12003BF-E2 be directly replaced with ULN2003ADR? A: Yes. Both parts maintain 7-output Darlington array configuration, 50V/500mA electrical ratings, 16-SOIC surface mount package, and ROHS3 compliance. PCB layout must accommodate the 0.154" package width of ULN2003ADR versus the 0.173" width of BA12003BF-E2.
Q: What is the difference between ULN2003ADR and ULN2003AIDR? A: Both are functionally equivalent 7-output Darlington arrays with identical electrical specifications. ULN2003AIDR supports extended operating temperature range (-40°C ~ 105°C) versus ULN2003ADR (-40°C ~ 70°C). ULN2003AIDR is actively manufactured; ULN2003ADR is active but with lower temperature rating.
Q: Are Toshiba TBD62003 parts suitable replacements? A: TBD62003AFG,EL and TBD62003AFWG,EL provide functional equivalence for relay and solenoid driver applications with 7 outputs, 50V/500mA ratings, and active product status. These are classified as power switches rather than Darlington arrays but maintain compatible electrical performance.
Q: Does package width affect substitution? A: Yes. BA12003BF-E2 uses 16-SOIC (0.173", 4.40mm width). Most Texas Instruments alternatives use 16-SOIC (0.154", 3.90mm width). ULN2003ANS and ULN2003ANSR use 16-SOIC (0.209", 5.30mm width). PCB footprint and layout spacing must be verified before substitution.
Q: Which substitute part has the longest operating temperature range? A: ULN2003AID and ULN2003AIDR support -40°C ~ 105°C, the widest range among all listed alternatives. This exceeds the original BA12003BF-E2 specification of -25°C ~ 75°C.
Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original BA12003BF-E2 specifications.
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