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3KASMC30AHE3_A/I Equivalent & Substitute Parts
Part Overview
The 3KASMC30AHE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for surface mount applications in the DO-214AB (SMC) package. This component is rated for 30V reverse standoff voltage with a 48.4V maximum clamping voltage and 62A peak pulse current capability. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 3KASMC30AHE3_A/I |
| Manufacturer | Vishay General Semiconductor - Diodes Division |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener, Unidirectional |
| Voltage - Reverse Standoff (Typ) | 30V |
| Voltage - Breakdown (Min) | 33.3V |
| Voltage - Clamping (Max) @ Ipp | 48.4V |
| Current - Peak Pulse (10/1000µs) | 62A |
| Power - Peak Pulse | 3000W (3kW) |
| Package / Case | DO-214AB, SMC |
| Mounting Type | Surface Mount |
| Operating Temperature | -65°C ~ 185°C (TJ) |
| Grade | Automotive |
| Qualification | AEC-Q101 |
| RoHS Status | ROHS3 Compliant |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitute parts for the 3KASMC30AHE3_A/I are qualified based on the following electrical and mechanical parameters:
Critical Matching Parameters:
- Voltage - Reverse Standoff: 30V (Typ)
- Voltage - Breakdown: 33.3V (Min)
- Voltage - Clamping: 48.4V (Max) @ Ipp
- Current - Peak Pulse: 62A (10/1000µs)
- Power - Peak Pulse: 3000W (3kW)
- Package / Case: DO-214AB, SMC
- Mounting Type: Surface Mount
- Type: Zener, Unidirectional
All substitute parts listed maintain identical electrical specifications for voltage suppression and current handling. Package compatibility is maintained across all substitutes in the DO-214AB (SMC) form factor, ensuring direct PCB footprint compatibility. Operating temperature ranges and compliance certifications vary among manufacturers but remain within acceptable industrial and automotive standards.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse | Power - Peak Pulse | Operating Temperature | Product Status | Grade | Qualification |
|---|---|---|---|---|---|---|---|---|---|
| 3KASMC30AHE3_A/I | Vishay General Semiconductor - Diodes Division | 30V | 48.4V | 62A | 3000W | -65°C ~ 185°C | Obsolete | Automotive | AEC-Q101 |
| 3KASMC30AHE3_B/I | Vishay General Semiconductor - Diodes Division | 30V | 48.4V | 62A | 3000W | -65°C ~ 185°C | Active | Automotive | AEC-Q101 |
| 3.0SMCJ30A-13 | Diodes Incorporated | 30V | 48.4V | 62A | 3000W | -55°C ~ 175°C | Active | — | — |
| 3SMC30A TR13 PBFREE | Central Semiconductor Corp | 30V | 48.4V | 62A | 3000W | -65°C ~ 150°C | Active | — | — |
| SM30T35AY | STMicroelectronics | 30V | 48.4V | 62A | 3000W | -55°C ~ 175°C | Active | Automotive | AEC-Q101 |
| SMC30J30A | STMicroelectronics | 30V | 48.4V | 62A | 3000W | -55°C ~ 175°C | Active | — | — |
| SMDJ30A-HR | Littelfuse Inc. | 30V | 48.4V | 62A | 3000W | -65°C ~ 150°C | Active | — | — |
| SMDJ30A-HRA | Littelfuse Inc. | 30V | 48.4V | 62A | 3000W | -65°C ~ 150°C | Active | — | — |
| SMLJ30A-TP | Micro Commercial Co | 30V | 48.4V | 62A | 3000W | -55°C ~ 175°C | Active | — | — |
| SMLJ30AE3/TR13 | Microchip Technology | 30V | 48.4V | 62A | 300W | -55°C ~ 150°C | Active | — | — |
| TPSMD30A | Littelfuse Inc. | 30V | 48.4V | 62A | 3000W | -65°C ~ 150°C | Active | Automotive | AEC-Q101 |
Engineering Selection Recommendations
Primary Recommendation for Automotive Applications: For designs requiring automotive-grade components with AEC-Q101 qualification, select either 3KASMC30AHE3_B/I (Vishay), SM30T35AY (STMicroelectronics), or TPSMD30A (Littelfuse). These parts maintain the same electrical specifications as the obsolete 3KASMC30AHE3_A/I while offering active product status and established supply chains.
Alternative for General Purpose Applications: For non-automotive applications where AEC-Q101 qualification is not required, 3.0SMCJ30A-13 (Diodes Incorporated), SMC30J30A (STMicroelectronics), or SMLJ30A-TP (Micro Commercial Co) provide equivalent electrical performance with active availability.
Temperature Range Consideration: The original part operates to 185°C junction temperature. Most active substitutes operate to 150°C or 175°C. For applications requiring the full 185°C capability, 3KASMC30AHE3_B/I remains the closest match from the same manufacturer.
Power Dissipation Note: SMLJ30AE3/TR13 (Microchip Technology) specifies 300W peak pulse power versus 3000W for all other parts. This part is not suitable for applications requiring full 3000W transient suppression capability.
Frequently Asked Questions (FAQ)
Q: Can I directly replace 3KASMC30AHE3_A/I with any of the listed substitutes? A: Yes, all listed substitutes maintain identical electrical specifications (30V standoff, 48.4V clamping, 62A peak pulse) and the same DO-214AB (SMC) package footprint. Direct PCB replacement is mechanically and electrically compatible.
Q: Which substitute is best for automotive applications? A: 3KASMC30AHE3_B/I, SM30T35AY, or TPSMD30A are recommended for automotive use, as they carry AEC-Q101 qualification and automotive-grade designation. 3KASMC30AHE3_B/I is the direct Vishay equivalent with the widest operating temperature range (-65°C to 185°C).
Q: Does operating temperature range affect substitution? A: Operating temperature range should be verified against your application requirements. The original part operates to 185°C; most substitutes operate to 150°C or 175°C. If your design requires operation above 175°C, 3KASMC30AHE3_B/I is the only listed option.
Q: What is the difference between packaging designations (Tape & Reel vs. Cut Tape)? A: Tape & Reel (TR) and Cut Tape (CT) refer to supply format only. Both formats contain identical components and are suitable for automated assembly. Selection depends on your procurement and assembly process requirements.
Q: Is SMLJ30AE3/TR13 a suitable replacement? A: SMLJ30AE3/TR13 matches all electrical parameters except peak pulse power (300W vs. 3000W). It is suitable only for applications where transient energy absorption does not exceed 300W. For full 3000W capability, select an alternative from the list.
Q: Are all substitutes RoHS3 compliant? A: Yes, all listed substitute parts are RoHS3 compliant and REACH unaffected, matching the compliance status of the original part.
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