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SMCJ28AE3/TR13 Equivalent & Substitute Parts
Part Overview
The SMCJ28AE3/TR13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a 28V reverse standoff voltage and provides 45.4V clamping at peak pulse current, delivering 1500W peak pulse power dissipation in a DO-214AB (SMC) package. The part is ROHS3 compliant, REACH unaffected, and maintains active product status. Equivalent and substitute parts are identified based on matching electrical performance parameters, package compatibility, and operational specifications to ensure functional interchangeability in circuit protection applications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 28 | V |
| Voltage - Breakdown (Min) | 31.1 | V |
| Voltage - Clamping (Max) @ Ipp | 45.4 | V |
| Current - Peak Pulse (10/1000µs) | 33 | A |
| Power - Peak Pulse | 1500 | W |
| Package / Case | DO-214AB, SMC | - |
| Operating Temperature Range | -65°C to 150°C | TJ |
| Type | Zener | - |
| Unidirectional Channels | 1 | - |
| RoHS Status | ROHS3 Compliant | - |
| Moisture Sensitivity Level | 1 (Unlimited) | - |
Substitute Part Grouping Explanation
Substitute parts for the SMCJ28AE3/TR13 are classified into two categories based on electrical and mechanical compatibility:
Direct Substitutes maintain identical electrical performance across all critical parameters: 28V reverse standoff voltage, 31.1V minimum breakdown voltage, 45.4V maximum clamping voltage, 33A peak pulse current, and 1500W peak pulse power. These parts are functionally interchangeable and differ only in manufacturer, packaging designation, or tape & reel configuration. Direct substitutes include SMCJ28A variants from Meritek, Diodes Incorporated, and Vishay General Semiconductor.
Similar Substitutes share the same voltage protection class (28V standoff, 31.1V breakdown, 45.4V clamping) and package form factor but differ in peak pulse current handling or power dissipation capacity. These parts provide equivalent voltage protection but with enhanced current or power ratings, suitable for applications requiring higher transient energy absorption. Similar substitutes include 3.0SMCJ28A-13, 5.0SMDJ28A, and 5.0SMDJ28A-T7.
Substitution eligibility is determined by matching the following parameters: Voltage - Reverse Standoff (28V), Voltage - Breakdown (31.1V minimum), Voltage - Clamping (45.4V), Package / Case (DO-214AB, SMC), Type (Zener), Unidirectional Channels (1), and RoHS compliance status.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (V) | Voltage - Breakdown (V) | Voltage - Clamping (V) | Current - Peak Pulse (A) | Power - Peak Pulse (W) | Operating Temperature (°C) | Package | Substitution Type |
|---|---|---|---|---|---|---|---|---|---|
| SMCJ28AE3/TR13 | Microchip Technology | 28 | 31.1 | 45.4 | 33 | 1500 | -65 to 150 | DO-214AB, SMC | Reference |
| SMCJ28A | Meritek | 28 | 31.1 | 45.4 | 33.04 | 1500 | -55 to 150 | DO-214AB, SMC | Direct |
| SMCJ28A-13-F | Diodes Incorporated | 28 | 31.1 | 45.4 | 33 | 1500 | -55 to 150 | DO-214AB, SMC | Direct |
| SMCJ28A-E3/57T | Vishay General Semiconductor | 28 | 31.1 | 45.4 | 33 | 1500 | -55 to 150 | DO-214AB, SMC | Direct |
| SMCJ28A-E3/9AT | Vishay General Semiconductor | 28 | 31.1 | 45.4 | 33 | 1500 | -55 to 150 | DO-214AB, SMC | Direct |
| 3.0SMC28A | Littelfuse Inc. | 28 | 31.1 | 59 | 470 | - | -65 to 150 | DO-214AB, SMC | Similar |
| 3.0SMCJ28A-13 | Diodes Incorporated | 28 | 31.1 | 45.4 | 66.1 | 3000 | -55 to 175 | DO-214AB, SMC | Similar |
| 5.0SMDJ28A | Taiwan Semiconductor Corporation | 28 | 31.1 | 45.4 | 110 | 5000 | -55 to 175 | DO-214AB, SMC | Similar |
| 5.0SMDJ28A-T7 | Littelfuse Inc. | 28 | 31.1 | 45.4 | 110 | 5000 | -65 to 150 | DO-214AB, SMC | Similar |
Engineering Selection Recommendations
Direct Substitutes (SMCJ28A, SMCJ28A-13-F, SMCJ28A-E3/57T, SMCJ28A-E3/9AT) are functionally equivalent to the SMCJ28AE3/TR13 and provide identical electrical performance. All direct substitutes maintain ROHS3 compliance and REACH unaffected status. Selection among direct substitutes depends on manufacturer availability, packaging configuration (tape & reel designation), and inventory status. The Meritek SMCJ28A variant offers the highest inventory availability at 23,100 pieces. Diodes Incorporated SMCJ28A-13-F provides 36,600 pieces in stock. Vishay General Semiconductor variants (SMCJ28A-E3/57T and SMCJ28A-E3/9AT) are available with lower inventory levels (2,100 and 3,600 pieces respectively) but carry the TransZorb® series designation.
Similar Substitutes (3.0SMCJ28A-13, 5.0SMDJ28A, 5.0SMDJ28A-T7) provide enhanced current handling and power dissipation while maintaining the same voltage protection class. The 3.0SMCJ28A-13 from Diodes Incorporated doubles the peak pulse current to 66.1A and power to 3000W, with extended operating temperature range to 175°C. The 5.0SMDJ28A and 5.0SMDJ28A-T7 provide the highest current capacity at 110A and 5000W power dissipation. Similar substitutes are appropriate for applications requiring higher transient energy absorption or extended thermal operating ranges. All similar substitutes maintain ROHS3 compliance and REACH unaffected status.
The 3.0SMC28A from Littelfuse differs in clamping voltage (59V) and peak pulse current (470A at 8/20µs waveform), representing a different protection class and is not recommended as a direct functional equivalent.
Frequently Asked Questions (FAQ)
Q: Can SMCJ28A from Meritek directly replace SMCJ28AE3/TR13 from Microchip Technology?
A: Yes. The SMCJ28A maintains identical voltage parameters (28V standoff, 31.1V breakdown, 45.4V clamping), equivalent peak pulse current (33.04A versus 33A), matching power dissipation (1500W), and compatible DO-214AB package. Both are ROHS3 compliant with MSL 1 rating. The operating temperature range differs slightly (-55°C to 150°C versus -65°C to 150°C), which does not affect substitution in standard applications.
Q: What is the difference between direct and similar substitutes?
A: Direct substitutes maintain identical electrical performance across all critical parameters including peak pulse current and power dissipation. Similar substitutes share the same voltage protection class (28V standoff, 31.1V breakdown, 45.4V clamping) but provide higher current handling or power capacity. Direct substitutes are interchangeable without circuit modification. Similar substitutes are appropriate when enhanced transient energy absorption is required.
Q: Are all substitute parts available in tape & reel packaging?
A: Direct substitutes from Diodes Incorporated (SMCJ28A-13-F) and Vishay General Semiconductor (SMCJ28A-E3/57T, SMCJ28A-E3/9AT) are specified with tape & reel packaging. The Meritek SMCJ28A does not specify packaging designation. All similar substitutes are available in tape & reel configuration. Packaging designation should be confirmed with the supplier for specific procurement requirements.
Q: Can 5.0SMDJ28A-T7 be used in place of SMCJ28AE3/TR13?
A: Yes, with application-specific considerations. The 5.0SMDJ28A-T7 maintains identical voltage protection (28V standoff, 31.1V breakdown, 45.4V clamping) and compatible DO-214AB package. It provides enhanced current capacity (110A versus 33A) and power dissipation (5000W versus 1500W), making it suitable for applications requiring higher transient energy absorption. The operating temperature range (-65°C to 150°C) matches the reference part. This substitution is appropriate for high-energy transient environments.
Q: What compliance certifications apply to all substitute parts?
A: All direct and similar substitute parts listed maintain ROHS3 compliance and REACH unaffected status, matching the reference SMCJ28AE3/TR13. All parts carry MSL 1 (Unlimited) moisture sensitivity rating. ECCN classification is EAR99 and HTSUS code is 8541.10.0080 across all variants.
Q: Does the Vishay TransZorb® series designation affect substitution compatibility?
A: No. The TransZorb® series designation is a product line identifier from Vishay General Semiconductor. The SMCJ28A-E3/57T and SMCJ28A-E3/9AT variants maintain identical electrical specifications, package form factor, and compliance certifications as other direct substitutes. Series designation does not affect functional interchangeability.
Q: What is the significance of different tape & reel configuration codes (TR13, -13-F, -E3/57T, -E3/9AT)?
A: Tape & reel configuration codes identify specific packaging and reel specifications for automated assembly processes. These codes do not affect electrical performance or functional compatibility. Selection among configurations depends on assembly equipment compatibility and procurement specifications. All variants with tape & reel designation are suitable for surface-mount production environments.
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