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3KASMC16HE3/57T Transient Voltage Suppressor (TVS) Diode — Equivalent & Substitute Parts
Part Overview
The 3KASMC16HE3/57T is a unidirectional Zener TVS diode manufactured by Vishay General Semiconductor - Diodes Division, designed for transient voltage suppression in surface mount applications. This component features a 16V reverse standoff voltage, 28.8V maximum clamping voltage, and 3000W peak pulse power rating in a DO-214AB (SMC) package. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 3KASMC16HE3/57T |
| Manufacturer | Vishay General Semiconductor - Diodes Division |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener, Unidirectional |
| Voltage - Reverse Standoff (Typ) | 16V |
| Voltage - Breakdown (Min) | 17.8V |
| Voltage - Clamping (Max) @ Ipp | 28.8V |
| Current - Peak Pulse (10/1000µs) | 104A |
| Power - Peak Pulse | 3000W (3kW) |
| Operating Temperature Range | -65°C to +185°C (TJ) |
| Mounting Type | Surface Mount |
| Package / Case | DO-214AB, SMC |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Grade | Automotive (AEC-Q101) |
Substitute Part Grouping Explanation
Substitution of the 3KASMC16HE3/57T is determined by the following critical parameters:
Voltage Parameters: Reverse standoff voltage (16V), breakdown voltage minimum (17.8V), and clamping voltage maximum (28.8V) define the protection threshold. Substitute parts must maintain these voltage specifications within acceptable tolerances.
Current and Power Rating: Peak pulse current (104A) and peak pulse power (3000W) establish the transient energy handling capability. Substitutes with equal or higher ratings are acceptable.
Package and Mounting: DO-214AB (SMC) surface mount package is mandatory for PCB compatibility and thermal performance.
Compliance and Status: Active product status ensures ongoing availability. RoHS3 compliance and automotive qualification (AEC-Q101) are required for regulated applications.
The substitute parts listed below meet these criteria with variations in clamping voltage (26V or 28.8V), peak pulse current (52.1A to 193A), and power ratings (600W to 5000W). Parts with higher current and power ratings provide enhanced transient suppression capability while maintaining voltage compatibility.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff | Voltage - Clamping (Max) | Current - Peak Pulse | Power - Peak Pulse | Package | Product Status | Operating Temp Range |
|---|---|---|---|---|---|---|---|---|
| 3KASMC16HE3/57T | Vishay | 16V | 28.8V | 104A | 3000W | DO-214AB (SMC) | Obsolete | -65°C to +185°C |
| 5.0SMDJ16A | Taiwan Semiconductor Corporation | 16V | 26V | 193A | 5000W | DO-214AB (SMC) | Active | -55°C to +175°C |
| SMCJ16AE3/TR13 | Microchip Technology | 16V | 26V | 57.7A | 1500W | DO-214AB (SMC) | Active | -65°C to +150°C |
| SMCJ16E3/TR13 | Microchip Technology | 16V | 28.8V | 52.1A | 1500W | DO-214AB (SMC) | Active | -65°C to +150°C |
| SMDJ16A | Alpha & Omega Semiconductor Inc. | 16V | 26V | 115.4A | 3000W | DO-214AB (SMC) | Active | -55°C to +150°C |
| SMDJ16A-HR | Littelfuse Inc. | 16V | 26V | 115.4A | 3000W | DO-214AB (SMC) | Active | -65°C to +150°C |
| SMDJ16A-HRA | Littelfuse Inc. | 16V | 26V | 115.4A | 3000W | DO-214AB (SMC) | Active | -65°C to +150°C |
| SMDJ16A-HRAT7 | Littelfuse Inc. | 16V | 26V | 115.4A | 3000W | DO-214AB (SMC) | Active | -65°C to +150°C |
| SMCJ16A | EVVO Semi | 16V | 26V | 57.7A | 600W | DO-214AC (SMA) | Active | -65°C to +150°C |
Engineering Selection Recommendations
Direct Replacement (Clamping Voltage Match): SMCJ16E3/TR13 maintains the 28.8V clamping voltage specification of the original part while offering active product status and Microchip Technology manufacturing support. This part is suitable for applications requiring exact voltage matching.
Enhanced Performance Substitutes (26V Clamping): SMDJ16A, SMDJ16A-HR, SMDJ16A-HRA, and SMDJ16A-HRAT7 provide 26V clamping voltage with equivalent or superior peak pulse current (115.4A) and power ratings (3000W). These parts are manufactured by established suppliers (Alpha & Omega Semiconductor, Littelfuse) with active product status and full RoHS3 compliance.
High-Power Alternative: 5.0SMDJ16A from Taiwan Semiconductor Corporation offers the highest power rating (5000W) and peak pulse current (193A) with 26V clamping voltage, suitable for applications requiring enhanced transient suppression margin.
Package Consideration: SMCJ16A from EVVO Semi uses DO-214AC (SMA) package instead of DO-214AB (SMC), requiring PCB layout modification and is not recommended as a direct replacement without design review.
All recommended substitutes maintain the 16V reverse standoff voltage and 17.8V minimum breakdown voltage required for circuit protection. Selection should be based on application thermal requirements, available board space, and transient energy levels.
Frequently Asked Questions (FAQ)
Q: Can SMCJ16A (SMA package) replace 3KASMC16HE3/57T (SMC package)?
A: No. While electrical parameters are compatible, the SMA package (DO-214AC) differs physically from the SMC package (DO-214AB). PCB footprints are not interchangeable. Use only DO-214AB (SMC) packaged alternatives for direct board-level substitution.
Q: What is the difference between 26V and 28.8V clamping voltage substitutes?
A: The original part clamps at 28.8V maximum. Substitutes with 26V clamping provide lower voltage suppression, offering tighter protection margins. For applications sensitive to clamping voltage, select SMCJ16E3/TR13 (28.8V) or verify circuit tolerance to 26V clamping before selecting alternatives.
Q: Are Littelfuse SMDJ16A-HR, SMDJ16A-HRA, and SMDJ16A-HRAT7 interchangeable?
A: Yes. All three variants share identical electrical specifications (16V standoff, 26V clamping, 115.4A peak pulse, 3000W power) and DO-214AB (SMC) packaging. Differences are in tape reel configurations and internal manufacturing processes. Selection depends on supplier availability and procurement requirements.
Q: Does the obsolete status of 3KASMC16HE3/57T affect substitute part selection?
A: Yes. The original part is no longer manufactured. All recommended substitutes have active product status, ensuring long-term availability and manufacturing consistency. Active parts also receive ongoing quality and compliance updates.
Q: What is the temperature range impact when substituting?
A: The original part operates to +185°C junction temperature. Most substitutes are rated to +150°C. For applications operating near maximum junction temperature, verify thermal design margins. SMCJ16E3/TR13 and SMDJ16A-HR extend to -65°C minimum, matching the original specification.
Q: Can higher power-rated substitutes (5000W) be used in place of 3000W rated original?
A: Yes. Higher power ratings provide additional transient suppression capability without affecting circuit operation. 5.0SMDJ16A (5000W) is a valid upgrade for applications requiring enhanced protection margin, provided PCB thermal design accommodates the component.
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