Request Quote
(Ships tomorrow)
SMCJ30A-TP Transient Voltage Suppressor (TVS) Diode — Equivalent & Substitute Parts
Part Overview
The SMCJ30A-TP is a unidirectional Zener-type transient voltage suppressor manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. This TVS diode operates with a 30V reverse standoff voltage and provides 48.4V maximum clamping voltage at peak pulse current of 31A, delivering 1500W peak pulse power dissipation in a DO-214AB (SMC) package. The part is RoHS3 compliant, MSL Level 1, and maintains active product status. Equivalent and substitute parts are identified to support procurement flexibility, design optimization, and supply chain continuity when the primary part becomes unavailable or when application requirements necessitate alternative electrical or thermal characteristics.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 30 | V |
| Voltage - Breakdown (Min) | 33.3 | V |
| Voltage - Clamping (Max) @ Ipp | 48.4 | V |
| Current - Peak Pulse (10/1000µs) | 31 | A |
| Power - Peak Pulse | 1500 | W |
| Operating Temperature Range | -55 to 175 | °C |
| Package / Case | DO-214AB, SMC | — |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the SMCJ30A-TP are classified into two categories based on electrical and mechanical compatibility:
Direct Substitutes maintain identical electrical specifications across all critical parameters: 30V reverse standoff voltage, 33.3V minimum breakdown voltage, 48.4V maximum clamping voltage, 31A peak pulse current, and 1500W peak pulse power. These parts differ only in manufacturer, packaging configuration (Tape & Reel versus bulk), or internal device designation suffix. Direct substitutes are interchangeable at the circuit level without design modification.
Similar Substitutes share the same voltage class (30V standoff, 33.3V breakdown, 48.4V clamping) and package form factor (DO-214AB, SMC) but exhibit higher peak pulse current ratings (62A to 103A) and correspondingly higher power dissipation (3000W to 5000W). These parts provide enhanced transient energy absorption capability and are suitable for applications requiring greater surge protection margin or higher repetitive pulse stress tolerance. Similar substitutes require verification that the circuit design can accommodate the different electrical performance characteristics.
Substitution eligibility is determined by:
- Voltage - Reverse Standoff: 30V (required match)
- Voltage - Clamping (Max) @ Ipp: 48.4V (required match for direct substitutes)
- Package / Case: DO-214AB, SMC (required match)
- Type: Zener, Unidirectional (required match)
- RoHS Status: ROHS3 Compliant (required match)
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (V) | Voltage - Clamping (Max) @ Ipp (V) | Current - Peak Pulse (A) | Power - Peak Pulse (W) | Operating Temperature (°C) | Packaging | RoHS Status |
|---|---|---|---|---|---|---|---|---|
| SMCJ30A-TP | Micro Commercial Co | 30 | 48.4 | 31 | 1500 | -55 to 175 | Tape & Reel (TR) | ROHS3 Compliant |
| SMCJ30A | MDD | 30 | 48.4 | 31 | 1500 | -50 to 150 | — | ROHS3 Compliant |
| SMCJ30A-13-F | Diodes Incorporated | 30 | 48.4 | 31 | 1500 | -55 to 150 | Tape & Reel (TR) | ROHS3 Compliant |
| SMCJ30A-E3/57T | Vishay General Semiconductor - Diodes Division | 30 | 48.4 | 31 | 1500 | -55 to 150 | Tape & Reel (TR) | ROHS3 Compliant |
| SMCJ30A-E3/9AT | Vishay General Semiconductor - Diodes Division | 30 | 48.4 | 31 | 1500 | -55 to 150 | Tape & Reel (TR) | ROHS3 Compliant |
| 3.0SMC30A | Littelfuse Inc. | 30 | 62 | 420 (8/20µs) | — | -65 to 150 | Tape & Reel (TR) | ROHS3 Compliant |
| 3.0SMCJ30A-13 | Diodes Incorporated | 30 | 48.4 | 62 | 3000 | -55 to 175 | Cut Tape (CT) & Digi-Reel® | ROHS3 Compliant |
| 5.0SMDJ30A | Taiwan Semiconductor Corporation | 30 | 48.4 | 103 | 5000 | -55 to 175 | — | ROHS3 Compliant |
| 5.0SMDJ30A-T7 | Littelfuse Inc. | 30 | 48.4 | 103 | 5000 | -65 to 150 | Tape & Reel (TR) | ROHS3 Compliant |
Engineering Selection Recommendations
Direct Substitutes (Electrical Equivalents): SMCJ30A (MDD), SMCJ30A-13-F (Diodes Incorporated), SMCJ30A-E3/57T (Vishay), and SMCJ30A-E3/9AT (Vishay) are direct electrical equivalents with identical voltage and current ratings. All maintain RoHS3 compliance and MSL Level 1 moisture sensitivity. Selection among these parts should prioritize product availability, lead time, and packaging format (Tape & Reel preferred for automated assembly). The MDD variant offers the largest inventory (22,928 pcs), while Vishay TransZorb® variants provide established supply through major distributors. Operating temperature range varies slightly; the Micro Commercial Co original part and Diodes Incorporated variant support -55°C minimum, while MDD and Vishay variants are rated to -50°C or -55°C respectively.
Similar Substitutes (Enhanced Performance): 3.0SMCJ30A-13 (Diodes Incorporated), 5.0SMDJ30A (Taiwan Semiconductor Corporation), and 5.0SMDJ30A-T7 (Littelfuse) provide higher peak pulse current and power dissipation while maintaining the 30V voltage class and 48.4V clamping voltage. These parts are suitable for applications requiring greater transient energy absorption. The 3.0SMCJ30A-13 doubles the peak pulse current to 62A and power to 3000W. The 5.0SMDJ series provides the highest performance with 103A peak pulse current and 5000W power dissipation. All similar substitutes maintain RoHS3 compliance and are available in production quantities.
Voltage Class Variant: 3.0SMC30A (Littelfuse) shares the 30V standoff voltage but exhibits 62V clamping voltage and 420A peak pulse current (8/20µs pulse definition). This part operates under a different pulse standard and is not directly interchangeable without circuit analysis.
All recommended substitutes are active products with RoHS3 compliance, REACH unaffected status, and EAR99 export classification matching the original part.
Frequently Asked Questions (FAQ)
Q: Can I use SMCJ30A (MDD) as a direct replacement for SMCJ30A-TP? A: Yes. The MDD variant maintains identical electrical specifications: 30V reverse standoff, 48.4V clamping voltage, 31A peak pulse current, and 1500W power dissipation. The primary difference is manufacturer and packaging configuration. Operating temperature range is -50°C to 150°C versus -55°C to 175°C for the original; verify your application's temperature requirements.
Q: What is the difference between direct substitutes and similar substitutes? A: Direct substitutes (SMCJ30A variants from MDD, Diodes, Vishay) provide identical electrical performance and are circuit-level interchangeable. Similar substitutes (3.0SMCJ30A-13, 5.0SMDJ30A series) maintain the same voltage class but offer higher peak pulse current (62A to 103A) and power dissipation (3000W to 5000W), providing enhanced transient protection margin. Similar substitutes require design verification to confirm compatibility with your circuit's surge stress profile.
Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain RoHS3 compliance and MSL Level 1 moisture sensitivity, matching the original SMCJ30A-TP specifications.
Q: Can I use 5.0SMDJ30A in place of SMCJ30A-TP without circuit modification? A: The 5.0SMDJ30A maintains the same voltage specifications (30V standoff, 48.4V clamping) and package form factor (DO-214AB, SMC), making it physically and electrically compatible. However, the higher peak pulse current (103A versus 31A) and power rating (5000W versus 1500W) represent enhanced performance characteristics. No circuit modification is required, but verify that your PCB layout and thermal management can accommodate the higher energy dissipation if the part operates at its maximum rated conditions.
Q: What packaging options are available for substitute parts? A: Direct substitutes are available in Tape & Reel (TR) format from Diodes Incorporated, Vishay, and Littelfuse, suitable for automated assembly. The MDD variant does not specify packaging format. Similar substitutes are available in Tape & Reel (3.0SMCJ30A-13, 5.0SMDJ30A-T7) or unspecified packaging (5.0SMDJ30A). Confirm packaging availability with your supplier before design release.
Q: Which substitute offers the best inventory availability? A: 5.0SMDJ30A (Taiwan Semiconductor Corporation) provides the largest inventory at 300,300 pcs. SMCJ30A (MDD) offers 22,928 pcs. SMCJ30A-E3/57T (Vishay) provides 42,500 pcs. Inventory levels should be verified with your distributor, as stock quantities fluctuate.
Q: Are Vishay TransZorb® variants (SMCJ30A-E3/57T, SMCJ30A-E3/9AT) preferred for any specific applications? A: Vishay TransZorb® variants are established products with broad market adoption and long-term availability. The designation suffix (-E3/57T or -E3/9AT) indicates different packaging reel configurations for automated assembly. Both variants maintain identical electrical specifications and are suitable for general-purpose transient voltage suppression. Selection should be based on your assembly equipment compatibility and distributor availability.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts