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SMLJ30AE3/TR13 Equivalent & Substitute Parts
Part Overview
The SMLJ30AE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose protection in surface-mount applications. This unidirectional Zener diode features a 30V reverse standoff voltage and a 48.4V clamping voltage with 62A peak pulse current capability. The component is housed in a DO-214AB (SMC) package and is supplied on tape and reel (TR13).
The part is active in production status and ROHS3 compliant. Finding equivalent and substitute parts becomes necessary for supply chain continuity, design flexibility, manufacturing location preferences, or when the original component faces availability constraints.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer | Microchip Technology | — |
| Part Number | SMLJ30AE3/TR13 | — |
| Type | Zener TVS Diode | — |
| Unidirectional Channels | 1 | — |
| Voltage - Reverse Standoff (Typ) | 30 | V |
| Voltage - Breakdown (Min) | 33.3 | V |
| Voltage - Clamping (Max) @ Ipp | 48.4 | V |
| Current - Peak Pulse (10/1000µs) | 62 | A |
| Power - Peak Pulse | 300 | W |
| Operating Temperature Range | -55 to 150 | °C (TJ) |
| Package / Case | DO-214AB, SMC | — |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| MSL Rating | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Equivalent TVS diodes for the SMLJ30AE3/TR13 are identified based on strict electrical parameter matching across the transient voltage suppression category. Substitution eligibility is determined by the following criteria:
Core Electrical Parameters (Must Match):
- Voltage - Reverse Standoff (Typ): 30V
- Voltage - Breakdown (Min): 33.3V
- Voltage - Clamping (Max) @ Ipp: 48.4V
- Current - Peak Pulse (10/1000µs): 62A
- Unidirectional Channels: 1 channel
- Type: Zener
Package Compatibility:
- Package / Case: DO-214AB or SMC designation
- Mounting Type: Surface Mount
Substitute parts are classified into two categories:
Direct Substitutes: Parts meeting all core electrical parameters (30V reverse standoff, 48.4V clamping, 62A peak pulse) with identical or superior power dissipation ratings and compatible packaging.
Similar Parts: Components sharing the same voltage classification (30V reverse standoff, 33.3V breakdown minimum, 48.4V clamping maximum) but with different peak pulse current ratings or power ratings that may be applicable in specific circuit configurations.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | V-Reverse Standoff (Typ) | V-Breakdown (Min) | V-Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Operating Temperature | Package Type | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| SMLJ30AE3/TR13 | Microchip Technology | 30V | 33.3V | 48.4V | 62A | 300W | -55 to 150°C | DO-214AB, SMC | ROHS3 |
| 3.0SMCJ30A-13 | Diodes Incorporated | 30V | 33.3V | 48.4V | 62A | 3000W | -55 to 175°C | DO-214AB, SMC | ROHS3 |
| 3SMC30A TR13 PBFREE | Central Semiconductor Corp | 30V | 33.3V | 48.4V | 62A | 3000W | -65 to 150°C | DO-214AB, SMC | ROHS3 |
| SM30T35AY | STMicroelectronics | 30V | 33.3V | 48.4V | 62A | 3000W | -55 to 175°C | DO-214AB, SMC | ROHS3 |
| SMC30J30A | STMicroelectronics | 30V | 33.3V | 48.4V | 62A | 3000W | -55 to 175°C | DO-214AB, SMC | ROHS3 |
| SMDJ30A | Alpha & Omega Semiconductor Inc. | 30V | 33.3V | 48.4V | 62A | 3000W | -55 to 150°C | DO-214AB, SMC | ROHS3 |
| SMDJ30A-HR | Littelfuse Inc. | 30V | 33.3V | 48.4V | 62A | 3000W | -65 to 150°C | DO-214AB, SMC | ROHS3 |
| SMLJ30A-TP | Micro Commercial Co | 30V | 33.3V | 48.4V | 62A | 3000W | -55 to 175°C | DO-214AB, SMC | ROHS3 |
| TPSMD30A | Littelfuse Inc. | 30V | 33.3V | 48.4V | 62A | 3000W | -65 to 150°C | DO-214AB, SMC | ROHS3 |
| 3.0SMC30A | Littelfuse Inc. | 30V | 33.3V | 62V | 420A | — | -65 to 150°C | DO-214AB, SMC | ROHS3 |
| 5.0SMDJ30A | Taiwan Semiconductor Corporation | 30V | 33.3V | 48.4V | 103A | 5000W | -55 to 175°C | DO-214AB, SMC | ROHS3 |
Engineering Selection Recommendations
Direct Substitutes for SMLJ30AE3/TR13:
The following parts are direct functional equivalents meeting all core electrical specifications (30V reverse standoff, 33.3V minimum breakdown, 48.4V clamping voltage, 62A peak pulse current):
- 3.0SMCJ30A-13 (Diodes Incorporated): Exceeds power dissipation (3000W vs. 300W). Operating temperature extended to 175°C. All compliance requirements met.
- 3SMC30A TR13 PBFREE (Central Semiconductor Corp): Meets all specifications. Lower temperature minimum (-65°C). Supplied on tape and reel. All compliance requirements met.
- SM30T35AY (STMicroelectronics): AEC-Q101 automotive qualification. Exceeds power dissipation (3000W). Operating temperature to 175°C. Suitable for automotive-grade applications.
- SMC30J30A (STMicroelectronics): Meets all specifications. Extended temperature to 175°C. All compliance requirements met.
- SMDJ30A (Alpha & Omega Semiconductor Inc.): Exceeds power dissipation (3000W vs. 300W). All compliance requirements met.
- SMDJ30A-HR (Littelfuse Inc.): Extended lower temperature (-65°C). All compliance requirements met.
- SMLJ30A-TP (Micro Commercial Co): Exceeds power dissipation (3000W). Extended temperature to 175°C. All compliance requirements met.
- TPSMD30A (Littelfuse Inc.): AEC-Q101 automotive qualification. Extended lower temperature (-65°C). Suitable for automotive-grade applications.
All direct substitutes maintain ROHS3 compliance, MSL level 1 (unlimited moisture sensitivity), and REACH unaffected status.
Similar Parts:
- 3.0SMC30A (Littelfuse Inc.): Identical voltage classification but with increased clamping voltage (62V) and peak pulse current (420A). Use only when enhanced overvoltage protection with higher current handling is required.
- 5.0SMDJ30A (Taiwan Semiconductor Corporation): Identical clamping voltage (48.4V) but with increased peak pulse current (103A) and power dissipation (5000W). Use when higher transient energy dissipation is needed.
Frequently Asked Questions (FAQ)
Q: Can I substitute SMLJ30AE3/TR13 with any of the listed direct substitute parts?
A: Yes. All direct substitute parts meet the core electrical specifications: 30V reverse standoff voltage, 33.3V minimum breakdown voltage, 48.4V clamping voltage, and 62A peak pulse current. All are surface-mount components in DO-214AB (SMC) packaging, ROHS3 compliant, and suitable for general-purpose TVS protection. Substitution is electrically valid without circuit redesign.
Q: What is the difference between direct substitutes and similar parts?
A: Direct substitutes maintain identical electrical parameters (voltage and current ratings). Similar parts (3.0SMC30A and 5.0SMDJ30A) have different voltage clamping or peak pulse current specifications. Selection of similar parts requires circuit analysis to confirm adequate protection under maximum transient conditions.
Q: Are all substitute parts available in tape and reel packaging?
A: Most direct substitutes are available in tape and reel (TR) or cut tape (CT) & Digi-Reel® packaging suitable for automated assembly. Packaging notation in part numbers or product specifications indicates the supplied format. Verify packaging configuration with the supplier before procurement.
Q: Does operating temperature range affect substitution suitability?
A: Operating temperature range affects suitability only if your circuit operates outside the component's rated range. The original SMLJ30AE3/TR13 specifies -55°C to 150°C. Several substitutes extend to 175°C or down to -65°C, providing wider temperature margins. If your design operates within the original range (-55°C to 150°C), all listed direct substitutes are suitable.
Q: What qualifications apply to specific substitute parts?
A: SM30T35AY and TPSMD30A carry AEC-Q101 automotive grade qualification, suitable for automotive electronics. Other parts are general-purpose grade. Select automotive-qualified parts only if your design requires automotive-grade components.
Q: Can I use the higher-power direct substitutes (3000W instead of 300W) in my circuit?
A: Yes. Higher power dissipation ratings are a superset capability; they do not affect circuit operation. Parts with 3000W or 5000W ratings can be used in place of the 300W original part without modification. This provides additional transient energy handling margin.
Q: What should I verify before final substitution?
A: Confirm package dimensions (DO-214AB compliance), pad layouts, and creepage requirements match your PCB design. Verify the substitute part meets ROHS3 compliance and MSL level 1 requirements if moisture-sensitive components are restricted in your manufacturing environment. Cross-reference datasheets for any application-specific electrical characteristics or mounting recommendations.
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