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Vishay General Semiconductor - Diodes Division SM6T68CAHE3/52
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- Part No.:
- SM6T68CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T68CAHE3/52.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,234
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Product details
Overview
SM6T68CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 68 V breakdown voltage (VBR = 64.6–71.4 V), 600 W peak pulse power (10/1000 μs), 92 V maximum clamping voltage at 6.5 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T68CAHE3/52 datasheet, SM6T68CAHE3/52 pinout, SM6T68CAHE3/52 application, or SM6T68CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.35), RoHS-compliant AEC-Q101 qualification, SMB thermal performance (RθJA = 100 °C/W), and compatibility with automated SMT placement.
Technical Context
The SM6T68CAHE3/52 operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients without polarity marking. Its glass-passivated junction ensures stable breakdown and low leakage (<1 μA at 58.1 V), while its low-inductance SMB package supports fast response to ESD and lightning-induced surges.
Designed for unclamped transient suppression per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive load dump), it delivers 92 V clamping at 6.5 A (10/1000 μs) and maintains operation across –65 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V - Ensures reliable avalanche conduction onset within tight tolerance for predictable clamping threshold |
| VWM | 58.1 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | 92.0 V @ 6.5 A (10/1000 μs) - Clamping voltage limits downstream IC stress during surge events |
| PPPM | 600 W - Peak transient power handling capacity under standardized 10/1000 μs waveform |
| TJ max | +150 °C - Enables deployment in under-hood automotive environments and industrial enclosures |
| Package | SMB (DO-214AA) - Surface-mount footprint compatible with IPC-7351B standard pad layout and reflow profiles |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002 solderability requirements. Bidirectional construction means no cathode/anode marking - terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as current entry point during positive or negative transients - no polarity dependency |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired terminal completing symmetrical clamping path; enables placement without orientation constraints |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Supports robust protection against IEC 61000-4-4 EFT bursts and ISO 7637-2 load-dump transients in 12 V systems |
| Glass passivated junction | Ensures stable VBR over time and temperature, minimizing drift in clamping threshold across life cycle |
| Low clamping ratio (VC/VBR ≈ 1.35) | Reduces voltage overshoot during surge events, improving margin for 75 V-rated downstream components |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns or baking requirements |
| AEC-Q101 qualified (HE3 suffix) | Validates reliability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus and CAN FD power rails from load dump and jump-start transients in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between VBAT and ground to limit surge energy entering power management ICs. Use Value: Withstands 600 W pulses and clamps to 92 V, preserving 75 V-rated DC-DC converters and microcontrollers without derating. | Use Scenario: Safeguarding analog front-end inputs of pressure and temperature sensors in factory automation PLCs exposed to relay coil flyback. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting transient energy away from precision ADC input stages. Use Value: 1 μA leakage at 58.1 V prevents signal offset errors; SMB package allows dense layout near sensor connectors. |
| Telecom Equipment Surge Suppression | Consumer USB Port ESD Protection |
Use Scenario: Front-end protection of PoE-powered Ethernet switches against lightning-induced common-mode surges on data pairs. IC Role / Device Role / Timing Role: Bidirectional clamping device installed across differential pair and chassis ground to divert surge current. Use Value: Symmetric VBR ensures equal clamping on both polarities; 92 V VC limits stress on PHY transceivers rated for 100 V abs max. | Use Scenario: Secondary-level ESD protection on USB 2.0 VBUS and D+/D− lines in smart speakers and set-top boxes. IC Role / Device Role / Timing Role: Fast-response TVS absorbing IEC 61000-4-2 ±8 kV contact discharge before reaching USB controller. Use Value: AEC-Q101 qualification ensures long-term stability in consumer devices subjected to thermal cycling and humidity exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ68CA-E3/52 | Same VBR range (64.6–71.4 V) but lower PPPM = 400 W; SMA package (larger RθJA = 130 °C/W) | Limited to lower-energy transients; less suitable for ISO 7637-2 Pulse 5a load dump | Select when cost or board space permits trade-off in surge margin and thermal performance |
| 1.5KE68CA | Higher PPPM = 1500 W but axial DO-15 package; not SMT-compatible; higher inductance | Requires through-hole assembly; unsuitable for high-density or automated production | Choose only for legacy designs or prototyping where manual assembly is acceptable |
Compared with SMAJ68CA-E3/52 and 1.5KE68CA, the SM6T68CAHE3/52 uniquely combines AEC-Q101 qualification, SMB SMT compatibility, 600 W capability, and bidirectional symmetry-making it optimal for automotive and industrial surface-mount surge protection where reliability, manufacturability, and standardized testing compliance are mandatory.
Availability
SM6T68CAHE3/52 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power interfaces, and consumer USB power delivery systems requiring stable component supply with full traceability and lifecycle support.
Supply support for SM6T68CAHE3/52 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SM6T Series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 validation are critical design requirements.
FAQ
What is the breakdown voltage tolerance for SM6T68CAHE3/52?
The SM6T68CAHE3/52 has a specified breakdown voltage range of 64.6 V to 71.4 V at 1 mA test current, corresponding to a ±5% tolerance around the nominal 68 V rating. This tight VBR distribution ensures consistent clamping behavior across production lots and supports precise system-level surge margin analysis for the SM6T68CAHE3/52.
Is SM6T68CAHE3/52 suitable for automotive applications?
Yes, the SM6T68CAHE3/52 carries the HE3 suffix, confirming it is RoHS-compliant and AEC-Q101 qualified. It has passed stress tests including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 requirements-making the SM6T68CAHE3/52 appropriate for under-hood and cabin electronics such as body control modules and ADAS sensor interfaces.
What is the maximum clamping voltage of SM6T68CAHE3/52 at rated peak pulse current?
The SM6T68CAHE3/52 clamps to a maximum of 92.0 V at 6.5 A under the standard 10/1000 μs double-exponential waveform. This value is guaranteed across temperature and lifetime, and defines the upper voltage limit imposed on protected circuitry during surge events involving the SM6T68CAHE3/52.
Does SM6T68CAHE3/52 require orientation during PCB placement?
No, the SM6T68CAHE3/52 is a bidirectional TVS diode with no polarity marking on the SMB package. Both terminals are functionally identical, allowing unrestricted orientation during automated placement-eliminating assembly errors and simplifying layout for differential or AC-coupled lines where the SM6T68CAHE3/52 is deployed.
What is the thermal resistance of SM6T68CAHE3/52 from junction to ambient?
The SM6T68CAHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard JEDEC test conditions and directly impacts steady-state power dissipation limits and transient thermal response during repeated surge events involving the SM6T68CAHE3/52.
SM6T68CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 6.5A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T68CAHE3/52 FAQ
1.How can I place an order for SM6T68CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T68CAHE3/52 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 SM6T68CAHE3/52 reliable?
The price and inventory of SM6T68CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T68CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SM6T68CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T68CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T68CAHE3/52?
SM6T68CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T68CAHE3/52 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 SM6T68CAHE3/52?
For technical support, including SM6T68CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T68CAHE3/52 requirements.
6.How does Aetrix verify that SM6T68CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T68CAHE3/52 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 SM6T68CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SM6T68CAHE3/52?
All SM6T68CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T68CAHE3/52, 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 SM6T68CAHE3/52 part is unused and in its original packaging.
Return procedure for SM6T68CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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