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Vishay General Semiconductor - Diodes Division SM6T68AHE3/52
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- Part No.:
- SM6T68AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T68AHE3/52.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,434
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Product details
Overview
SM6T68AHE3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping ESD and surge transients on power/signal lines. It features 64.6 V to 71.4 V breakdown voltage (VBR), 58.1 V stand-off voltage (VWM), 92.0 V maximum clamping voltage (VC) at 6.5 A peak pulse current, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T68AHE3/52 datasheet, SM6T68AHE3/52 pinout, SM6T68AHE3/52 application, or SM6T68AHE3/52 equivalent, key selection criteria include unidirectional polarity, 92.0 V clamping performance under 6.5 A surge, RoHS-compliant AEC-Q101 qualification, SMB footprint compatibility, and 100 °C/W junction-to-ambient thermal resistance.
Technical Context
The SM6T68AHE3/52 operates as a silicon avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) to transient overvoltages. Its unidirectional configuration provides cathode-anode polarity with band-marked cathode end, enabling integration into DC-biased protection paths without reverse conduction.
It delivers 600 W peak pulse power handling per 10/1000 μs waveform under standard mounting conditions (0.2" × 0.2" copper pads), with thermal derating above 25 °C ambient and maximum junction temperature of +150 °C. Clamping behavior is characterized by low dynamic impedance and stable VC across rated IPPM range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V - Ensures reliable avalanche initiation above 58.1 V operating voltage while maintaining margin against false triggering |
| VWM | 58.1 V - Maximum continuous reverse voltage before leakage exceeds 1 μA; defines upper limit for DC bias operation |
| VC @ IPPM | 92.0 V @ 6.5 A - Clamped voltage during 600 W transient; determines protected circuit's maximum stress level |
| PPPM | 600 W - Peak surge energy absorption capability using standardized 10/1000 μs waveform |
| TJ max. | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures with elevated ambient temps |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient air; informs heatsinking requirements for sustained power dissipation |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VWM exceeded |
| Anode | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power rating | Supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V/24 V rails |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| Glass passivated junction | Ensures long-term reliability and stable electrical parameters under thermal cycling and humidity exposure |
| Low inductance SMB package | Minimizes voltage overshoot during fast transients (<1 ns response), critical for protecting high-speed ICs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground to clamp surges above 58.1 V. Use Value: Limits peak voltage to 92.0 V during 6.5 A transients, preventing damage to downstream regulators and microcontrollers. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Standoff protection element on 4–20 mA current loop or 0–10 V signal line. Use Value: Maintains signal integrity by suppressing ESD events up to ±15 kV (IEC 61000-4-2) without affecting DC accuracy. |
| Consumer USB Power Input Protection | Telecom DC Feeder Line Protection |
Use Scenario: Securing 5 V USB-C PD input stages in portable medical devices and smart home hubs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VBUS line upstream of buck converter and USB controller. Use Value: Withstands repetitive 10/1000 μs surges up to 600 W while maintaining <1 μA leakage at 5 V nominal. | Use Scenario: Protecting -48 V DC telecom power feeds from lightning-induced surges in remote radio units. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; this unidirectional part used with series blocking diode for negative rail clamping. Use Value: Provides 92.0 V clamping ceiling on -48 V rail, ensuring downstream DC-DC converters remain within safe operating area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ68A-E3/52 | Same SMB package, identical VBR/VC, but rated for 400 W PPPM (vs. 600 W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 compliance | Select SMAJ68A-E3/52 only if system-level surge testing requires ≤400 W rating and cost optimization is prioritized |
| SMCJ68AHE3/52 | Higher PPPM (1500 W), same VBR/VC, larger SMC (DO-214AB) package | Requires PCB layout change; suited for higher-reliability industrial power supplies | Choose SMCJ68AHE3/52 when 1500 W surge immunity is mandated and board space allows SMC footprint |
Compared with SMAJ68A-E3/52 and SMCJ68AHE3/52, the SM6T68AHE3/52 uniquely balances 600 W surge capability with compact SMB packaging and AEC-Q101 qualification-making it optimal for space-constrained automotive modules requiring validated reliability.
Availability
SM6T68AHE3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and consumer USB power input circuits requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for SM6T68AHE3/52 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 validation.
The SM6T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 qualification are mandatory.
FAQ
What is the clamping voltage of SM6T68AHE3/52 at its rated peak pulse current?
The SM6T68AHE3/52 has a maximum clamping voltage (VC) of 92.0 V at 6.5 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured with the device mounted on 0.2" × 0.2" copper pads and represents the upper voltage limit imposed on protected circuitry during surge events. The SM6T68AHE3/52 maintains this clamping performance across its specified operating temperature range.
Is SM6T68AHE3/52 suitable for automotive applications?
Yes, SM6T68AHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix. It meets stringent reliability requirements for under-hood and cabin electronics, including thermal cycling, humidity resistance, and mechanical shock. The SM6T68AHE3/52 is commonly deployed in engine control units, body control modules, and ADAS sensor interfaces where certified surge immunity is required.
What does the "HE3" suffix indicate in SM6T68AHE3/52?
The "HE3" suffix in SM6T68AHE3/52 denotes RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this version from commercial-grade "E3" variants and confirms compliance with automotive-grade reliability standards, including extended temperature operation (-65 °C to +150 °C) and enhanced process controls. The SM6T68AHE3/52 is intended for mission-critical automotive systems requiring validated long-term stability.
How does SM6T68AHE3/52 differ from bidirectional TVS diodes like SM6T68CA?
The SM6T68AHE3/52 is unidirectional and functions only in reverse-bias mode, with polarity marked by a cathode band. In contrast, SM6T68CA is bidirectional and symmetrical, suitable for AC or floating signal lines. The SM6T68AHE3/52 offers lower leakage at DC bias and is preferred for DC power rail protection, whereas SM6T68CA is selected for differential data lines or transformer-coupled interfaces where polarity reversal occurs.
What is the thermal resistance of SM6T68AHE3/52, and how does it affect layout design?
The SM6T68AHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W under standard test conditions (0.2" × 0.2" copper pads). This value guides PCB layout: increasing copper area or adding thermal vias reduces effective RθJA, allowing higher average power dissipation. For sustained operation near 5.0 W, the SM6T68AHE3/52 requires careful thermal management to maintain TJ ≤ 150 °C.
SM6T68AHE3/52 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:
- 1
- Bidirectional Channels:
- -
- 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)
SM6T68AHE3/52 FAQ
1.How can I place an order for SM6T68AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T68AHE3/52 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 SM6T68AHE3/52 reliable?
The price and inventory of SM6T68AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T68AHE3/52 is usually 5 days.
3.What payment methods are accepted for SM6T68AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T68AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T68AHE3/52?
SM6T68AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T68AHE3/52 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 SM6T68AHE3/52?
For technical support, including SM6T68AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T68AHE3/52 requirements.
6.How does Aetrix verify that SM6T68AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T68AHE3/52 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 SM6T68AHE3/52 meets industry standards.
7.What is the process for return or replacement of SM6T68AHE3/52?
All SM6T68AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T68AHE3/52, 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 SM6T68AHE3/52 part is unused and in its original packaging.
Return procedure for SM6T68AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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