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TPSMC6.8AHE3_A/I Equivalent & Substitute Parts
Part Overview
The TPSMC6.8AHE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the PAR® series. This component is designed for surface mount applications in the DO-214AB (SMCJ) package and provides transient voltage protection with a 5.8V reverse standoff voltage and 10.5V maximum clamping voltage at peak pulse current.
The TPSMC6.8AHE3_A/I is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Voltage - Reverse Standoff (Typ) | 5.8V |
| Voltage - Breakdown (Min) | 6.45V |
| Voltage - Clamping (Max) @ Ipp | 10.5V |
| Current - Peak Pulse (10/1000µs) | 143A |
| Power - Peak Pulse | 1500W (1.5kW) |
| Operating Temperature Range | -65°C ~ 185°C (TJ) |
| Package / Case | DO-214AB, SMC |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Grade | Automotive |
| Qualification | AEC-Q101 |
Substitute Part Grouping Explanation
Substitution of the TPSMC6.8AHE3_A/I is determined by the following critical parameters:
- Voltage - Reverse Standoff (Typ): 5.8V
- Voltage - Clamping (Max) @ Ipp: 10.5V
- Current - Peak Pulse (10/1000µs): 143A
- Power - Peak Pulse: 1500W
- Package / Case: DO-214AB, SMC
- Mounting Type: Surface Mount
- Unidirectional Channels: 1
Substitute parts are grouped into two categories:
Category A - Direct Electrical Equivalents (Active Status): Parts with identical electrical specifications, matching voltage ratings, peak pulse current, and power dissipation. These parts are currently in active production status and are recommended for new designs.
Category B - Automotive-Grade Equivalent (Active Status): Parts with identical electrical specifications and automotive qualification (AEC-Q101), offering extended operating temperature range (-65°C ~ 185°C) matching the original part.
Category C - Cross-Manufacturer Alternative: Parts from alternative manufacturers meeting identical electrical specifications and automotive qualification.
Parameter Comparison
| Part Number | Manufacturer | Series | Voltage - Reverse Standoff (Typ) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Operating Temperature | Product Status | Package |
|---|---|---|---|---|---|---|---|---|---|
| TPSMC6.8AHE3_A/I | Vishay | PAR® | 5.8V | 10.5V | 143A | 1500W | -65°C ~ 185°C | Obsolete | DO-214AB (SMCJ) |
| 1.5SMC6.8A-E3/57T | Vishay | 1.5SMC, TransZorb® | 5.8V | 10.5V | 143A | 1500W | -65°C ~ 150°C | Active | DO-214AB (SMCJ) |
| 1.5SMC6.8A-M3/57T | Vishay | 1.5SMC, TransZorb® | 5.8V | 10.5V | 143A | 1500W | -65°C ~ 150°C | Active | DO-214AB (SMCJ) |
| 1.5SMC6.8A-M3/9AT | Vishay | 1.5SMC, TransZorb® | 5.8V | 10.5V | 143A | 1500W | -65°C ~ 150°C | Active | DO-214AB (SMCJ) |
| SM15T6V8A-M3/57T | Vishay | SM15T, TransZorb® | 5.8V | 10.5V | 143A | 1500W | -65°C ~ 150°C | Active | DO-214AB (SMCJ) |
| SM15T6V8A-M3/9AT | Vishay | SM15T, TransZorb® | 5.8V | 10.5V | 143A | 1500W | -65°C ~ 150°C | Active | DO-214AB (SMCJ) |
| TPSMC6.8AHE3_B/I | Vishay | PAR® | 5.8V | 10.5V | 143A | 1500W | -65°C ~ 185°C | Active | DO-214AB (SMC) |
| SM15T6V8AY | STMicroelectronics | SM15TY, TRANSIL™ | 5.8V | 13.4V | 746A (8/20µs) | 1500W | -40°C ~ 150°C | Active | DO-214AB (SMC) |
Engineering Selection Recommendations
Primary Recommendation - Automotive Applications: TPSMC6.8AHE3_B/I is the direct successor to the obsolete TPSMC6.8AHE3_A/I. Both parts maintain identical electrical specifications, automotive grade classification, and AEC-Q101 qualification. The TPSMC6.8AHE3_B/I is currently in active production status and is the preferred choice for automotive applications requiring the extended operating temperature range of -65°C to 185°C.
Alternative Recommendation - General Purpose Applications: The 1.5SMC6.8A series (1.5SMC6.8A-E3/57T, 1.5SMC6.8A-M3/57T, 1.5SMC6.8A-M3/9AT) and SM15T6V8A series (SM15T6V8A-M3/57T, SM15T6V8A-M3/9AT) provide identical electrical performance with active production status. These parts are suitable for applications where the reduced operating temperature range (-65°C to 150°C) is acceptable. Selection between these alternatives depends on packaging format requirements (Tape & Reel variants available).
Cross-Manufacturer Alternative: SM15T6V8AY from STMicroelectronics is not recommended as a direct substitute. While it maintains the same reverse standoff voltage (5.8V) and package format, the clamping voltage (13.4V) and peak pulse current (746A at 8/20µs) differ significantly from the original specification. This part is suitable only for applications with different transient protection requirements.
Frequently Asked Questions (FAQ)
Q: Can I use 1.5SMC6.8A series parts as direct replacements for the obsolete TPSMC6.8AHE3_A/I?
A: The 1.5SMC6.8A series provides identical electrical specifications (5.8V reverse standoff, 10.5V clamping voltage, 143A peak pulse current, 1500W power dissipation) and the same DO-214AB (SMCJ) package. However, the operating temperature range is reduced to -65°C ~ 150°C compared to the original -65°C ~ 185°C. These parts are suitable for applications where this temperature range is acceptable.
Q: What is the difference between TPSMC6.8AHE3_B/I and the 1.5SMC6.8A series?
A: TPSMC6.8AHE3_B/I maintains the automotive grade classification and extended operating temperature range (-65°C ~ 185°C) of the original part, making it the preferred choice for automotive applications. The 1.5SMC6.8A series operates at -65°C ~ 150°C and is classified for general purpose applications. Both share identical electrical specifications and package format.
Q: Are SM15T6V8A and 1.5SMC6.8A parts interchangeable?
A: Yes. SM15T6V8A-M3/57T and SM15T6V8A-M3/9AT provide identical electrical specifications and package format to the 1.5SMC6.8A variants. Selection between these series depends on packaging format availability (Tape & Reel options) and supplier inventory.
Q: Why is SM15T6V8AY listed as a substitute if the specifications differ?
A: SM15T6V8AY is listed as a manufacturer-recommended alternative but is not a direct electrical equivalent. The higher clamping voltage (13.4V) and significantly higher peak pulse current (746A at 8/20µs) indicate this part is designed for different transient protection requirements. Use this part only if your application requires these enhanced specifications.
Q: What packaging options are available for substitute parts?
A: All substitute parts are available in Tape & Reel (TR) packaging format. Specific tape configurations are designated by part number suffixes (E3/57T, M3/57T, M3/9AT). Confirm tape specifications with your supplier based on your assembly equipment requirements.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance and are REACH unaffected, matching the environmental compliance status of the original TPSMC6.8AHE3_A/I.
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