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Vishay General Semiconductor - Diodes Division TPSMA6.8HE3/5AT
- Part No.:
- TPSMA6.8HE3/5AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA6.8HE3/5AT.pdf
- Description:
- TVS DIODE 5.5VWM 10.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,064
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Product details
Overview
TPSMA6.8HE3/5AT from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features 6.8 V nominal breakdown voltage (VBR), 400 W peak pulse power (10/1000 µs), 10.5 V maximum clamping voltage at 38.1 A peak pulse current, and operates up to +185 °C junction temperature-ideal for automotive sensor line protection.
For engineers reviewing the TPSMA6.8HE3/5AT datasheet, TPSMA6.8HE3/5AT pinout, TPSMA6.8HE3/5AT application, or TPSMA6.8HE3/5AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification (via HE3 suffix), MSL Level 1 rating, 5.8 V stand-off voltage, and low 0.047 %/°C temperature coefficient of VBR.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to deliver stable clamping under repetitive surge conditions. Its 10/1000 µs waveform response supports 400 W peak pulse power with 0.01 % duty cycle, and it maintains reliable operation across -65 °C to +185 °C junction temperature range.
The device exhibits excellent clamping ratio (VC/VBR ≈ 1.55), low incremental surge resistance, and fast response time typical of silicon avalanche diodes. It is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine) and meets JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 6.45 / 6.80 / 7.14 V at 10 mA - defines precise avalanche initiation threshold for predictable clamping onset |
| VWM | 5.80 V - maximum continuous reverse voltage before leakage exceeds 300 µA at 25 °C |
| VC @ IPPM | 10.5 V at 38.1 A - clamped voltage during 400 W transient, limiting downstream stress |
| PPPM | 400 W (10/1000 µs) - surge energy handling capacity suitable for automotive load-dump and ESD events |
| TJ max. | +185 °C - enables use in high-temperature engine bay or powertrain electronics without derating |
| αT | 0.047 %/°C - low temperature coefficient ensures stable VBR across wide thermal operating range |
| Polarity | Unidirectional - protects against positive-going transients only; cathode marked by band |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, matte tin-plated leads, UL 94 V-0 molding compound, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal avalanche junction | Connected to protected line; conducts when transient exceeds VBR, shunting current to ground |
| Anode | Cathode of internal avalanche junction | Typically tied to system ground or low-impedance return path; completes clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance per AEC standard |
| Junction passivation optimized design | Reduces surface leakage and improves long-term stability under high-humidity and bias stress conditions |
| Low clamping voltage ratio (VC/VBR) | ~1.55 - minimizes overvoltage exposure to downstream ICs while maintaining robust surge margin |
| MSL Level 1 rating | Enables standard SMT reflow without moisture sensitivity concerns or baking preconditioning |
| 185 °C TJ max. | Supports placement near heat sources (e.g., power MOSFETs, DC-DC converters) without thermal derating |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between signal line and chassis ground to limit transient overvoltage. Use Value: Clamps 400 W surges to ≤10.5 V, preserving signal integrity and preventing latch-up in 3.3 V/5 V interface ICs. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and EFT bursts. IC Role / Device Role / Timing Role: Standoff protector on 24 V DC input channels, absorbing repetitive inductive switching transients. Use Value: Withstands 40 A surge current and maintains <1 µA leakage at 5.8 V, ensuring clean logic thresholds and low standby power loss. |
| Consumer Power Adapter Input | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters subjected to lightning-induced surges on DC output rails. IC Role / Device Role / Timing Role: Fast-acting clamp on regulated 5 V/12 V outputs, triggered within nanoseconds of transient onset. Use Value: 10.5 V clamping voltage prevents damage to USB-PD controllers and synchronous rectifiers during 10/1000 µs events. | Use Scenario: Front-end protection for Ethernet PHYs and DSL line drivers in network edge equipment. IC Role / Device Role / Timing Role: Primary-level TVS on twisted-pair interfaces, coordinated with gas discharge tubes for multi-stage protection. Use Value: Low capacitance (<100 pF at zero bias) avoids signal integrity degradation at 100 Mbps+ data rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.8A | Same SMA package, 600 W PPPM, higher VC = 11.5 V at 33.5 A; not AEC-Q101 qualified | Lacks automotive qualification; suited for industrial/commercial designs where qualification is not mandated | Select SMAJ6.8A if higher surge rating is needed and AEC-Q101 is unnecessary |
| 1.5SMC6.8A | Higher-power SMC package (1500 W), larger footprint, VC = 11.2 V at 133 A; RoHS-compliant but not AEC-Q101 | Requires PCB area increase; used where board space allows and higher single-event energy absorption is critical | Choose 1.5SMC6.8A only when 400 W is insufficient and layout permits larger SMC footprint |
Compared with SMAJ6.8A and 1.5SMC6.8A, the TPSMA6.8HE3/5AT delivers automotive-grade reliability in a compact SMA package with tighter VBR tolerance and lower clamping voltage-making it optimal for space-constrained, high-temperature, and safety-critical vehicle subsystems.
Availability
TPSMA6.8HE3/5AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O terminals, and consumer power adapter designs requiring stable component supply, AEC-Q101 compliance, and high-temperature operational continuity.
Supply support for TPSMA6.8HE3/5AT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and ruggedized packaging.
The TPSMA6.8HE3/5AT belongs to Vishay's PAR® (Protection and Regulation) transient voltage suppressor family, engineered specifically for high-reliability clamping in automotive, industrial, and telecom environments where thermal stability and surge immunity are mission-critical.
FAQ
What is the exact breakdown voltage tolerance of the TPSMA6.8HE3/5AT?
The TPSMA6.8HE3/5AT has a specified breakdown voltage (VBR) range of 6.45 V to 7.14 V at 10 mA test current, yielding a ±5 % tolerance around the nominal 6.8 V value. This tight distribution ensures consistent clamping behavior across production lots and supports robust design margins in automotive and industrial systems where precise overvoltage thresholds are required. The TPSMA6.8HE3/5AT datasheet confirms this range under "ELECTRICAL CHARACTERISTICS" at TA = 25 °C.
Is the TPSMA6.8HE3/5AT suitable for bidirectional transient protection?
No, the TPSMA6.8HE3/5AT is strictly unidirectional and protects only against positive-going transients relative to its cathode terminal. It cannot suppress negative surges or AC-coupled transients. For bidirectional protection, a dedicated symmetric TVS like SMBJ6.8CA or a back-to-back diode configuration would be required. The TPSMA6.8HE3/5AT datasheet explicitly states "Available in uni-directional polarity only" in the FEATURES section.
Does the TPSMA6.8HE3/5AT require external series impedance for safe operation?
No, the TPSMA6.8HE3/5AT does not require external series impedance to function as a clamping device; it operates as a shunt protector. However, in practice, a current-limiting resistor or fuse is often placed upstream to prevent sustained overcurrent during prolonged overvoltage events. The TPSMA6.8HE3/5AT itself is rated for 1.0 W steady-state dissipation and handles short-duration surges per its 400 W PPPM rating-designs must ensure thermal management aligns with PCB copper pad size per Figure 2 in the datasheet.
How does the TPSMA6.8HE3/5AT perform at elevated ambient temperatures?
The TPSMA6.8HE3/5AT maintains full functionality up to +185 °C junction temperature, with electrical parameters derated linearly above TA = 25 °C per Figure 2 in the datasheet. At 125 °C ambient, its peak pulse power capability remains >250 W, and VBR shifts predictably using αT = 0.047 %/°C. This makes the TPSMA6.8HE3/5AT especially suitable for under-hood automotive applications where ambient temperatures exceed 105 °C.
What does the "HE3/5AT" suffix indicate in TPSMA6.8HE3/5AT?
The "HE3" portion denotes RoHS-compliant, AEC-Q101 qualified construction with matte tin plating and JESD201 Class 2 whisker resistance; "5AT" refers to the tape-and-reel packaging variant (7" reel, 1800 units per reel, standard orientation). This suffix confirms the TPSMA6.8HE3/5AT meets automotive reliability standards and is supplied in production-ready SMT format compatible with high-speed pick-and-place equipment.
TPSMA6.8HE3/5AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.5V
- Voltage - Breakdown (Min):
- 6.12V
- Voltage - Clamping (Max) @ Ipp:
- 10.8V
- Current - Peak Pulse (10/1000µs):
- 37A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
TPSMA6.8HE3/5AT FAQ
1.How can I place an order for TPSMA6.8HE3/5AT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA6.8HE3/5AT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPSMA6.8HE3/5AT reliable?
The price and inventory of TPSMA6.8HE3/5AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA6.8HE3/5AT is usually 5 days.
3.What payment methods are accepted for TPSMA6.8HE3/5AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA6.8HE3/5AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA6.8HE3/5AT?
TPSMA6.8HE3/5AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA6.8HE3/5AT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPSMA6.8HE3/5AT?
For technical support, including TPSMA6.8HE3/5AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA6.8HE3/5AT requirements.
6.How does Aetrix verify that TPSMA6.8HE3/5AT is sourced from the original manufacturer or authorized distributors?
All TPSMA6.8HE3/5AT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPSMA6.8HE3/5AT meets industry standards.
7.What is the process for return or replacement of TPSMA6.8HE3/5AT?
All TPSMA6.8HE3/5AT units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA6.8HE3/5AT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPSMA6.8HE3/5AT part is unused and in its original packaging.
Return procedure for TPSMA6.8HE3/5AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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