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Vishay General Semiconductor - Diodes Division SM6T68AHE3_A/H
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- Part No.:
- SM6T68AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T68AHE3_A/H.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,974
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Product details
Overview
SM6T68AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor in SMB (DO-214AA) package, with 64.6 V minimum breakdown voltage (VBR), 58.1 V standoff voltage (VWM), 92.0 V clamping voltage (VC) at 6.5 A peak pulse current, and 600 W peak pulse power rating per 10/1000 μs waveform-designed for protecting automotive sensor signal lines against inductive switching transients.
For engineers reviewing the SM6T68AHE3_A/H datasheet, SM6T68AHE3_A/H pinout, SM6T68AHE3_A/H application, or SM6T68AHE3_A/H equivalent, key selection criteria include clamping performance under 10/1000 μs surge, AEC-Q101 qualification status, unidirectional polarity with cathode band marking, and thermal resistance (RθJA = 100 °C/W) for PCB layout validation.
Technical Context
The SM6T68AHE3_A/H operates as a unidirectional TVS diode, leveraging a glass-passivated silicon junction to achieve low clamping ratio (VC/VBR ≈ 1.43) and fast response to ESD and surge events. Its 600 W peak pulse power handling is validated under standardized 10/1000 μs waveform conditions with derating above 25 °C ambient.
Designed for automotive-grade reliability, it meets AEC-Q101 qualification and is RoHS-compliant with matte tin-plated leads solderable per J-STD-002. The SMB (DO-214AA) package supports automated placement and achieves MSL level 1 moisture sensitivity with 260 °C reflow peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min) | 64.6 V - ensures reliable conduction onset above normal operating voltage of 58.1 V systems |
| VWM | 58.1 V - maximum continuous reverse voltage before leakage exceeds 1 μA |
| VC @ IPPM | 92.0 V at 6.5 A - limits transient voltage seen by protected ICs during 10/1000 μs surge |
| PPPM | 600 W - peak surge energy absorption capability under standardized waveform |
| TJ max | +150 °C - enables operation in under-hood automotive environments |
| RθJA | 100 °C/W - defines thermal rise from junction to ambient on standard 0.2" × 0.2" copper pads |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking for unidirectional polarity. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), 0.220" × 0.155" mounting pad footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to system ground or lower-potential rail in protection configuration |
| Cathode (banded end) | Current exit terminal during reverse-biased clamping | Connected to protected signal line; clamps transients toward ground when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use with extended temperature and reliability testing |
| 600 W peak pulse power | Robust suppression of ISO 7637-2 Pulse 1, 2a, and 5a transients in vehicle ECUs |
| Glass passivated junction | Enhanced stability and long-term reliability under thermal cycling and humidity stress |
| Low inductance SMB package | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time) |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive kickback in engine control modules. IC Role / Device Role / Timing Role: Unidirectional clamping device placed between signal line and chassis ground, conducting only during overvoltage events. Use Value: Limits transient voltage to ≤92.0 V, preventing damage to 5 V or 12 V interface ICs while maintaining signal integrity during normal operation. | Use Scenario: Safeguarding digital input terminals of programmable logic controllers exposed to relay coil flyback and motor drive noise in factory automation. IC Role / Device Role / Timing Role: Standoff voltage (58.1 V) allows compatibility with 24 V DC control systems; clamps surges within microseconds. Use Value: Enables robust field wiring without external snubbers, reducing BOM count and improving MTBF in harsh industrial environments. |
| Consumer Power Adapter Input Protection | Telecom Line Interface Protection |
Use Scenario: Secondary-side surge suppression on DC output rails of AC/DC adapters used in smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Unidirectional TVS placed after rectification to clamp overvoltage from capacitor discharge or regulator fault. Use Value: Prevents latch-up or burnout of downstream DC-DC converters rated for ≤60 V input, leveraging 64.6 V VBR margin. | Use Scenario: Protecting Ethernet PHY interfaces and RS-485 transceivers from lightning-induced surges on outdoor telecom links. IC Role / Device Role / Timing Role: Front-end clamping element in multi-stage protection schemes, absorbing bulk surge energy before GDT or MOV stages. Use Value: Provides precise 92.0 V clamping threshold compatible with 100BASE-TX common-mode voltage limits and IEEE C62.41 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64A-E3/52 | Same SMB package, 64 V VBR min, but 400 W PPPM; not AEC-Q101 qualified | Commercial-grade only; unsuitable for automotive under-hood deployment | Select if cost-sensitive non-automotive designs require basic 64 V clamping without qualification requirements |
| 1.5SMC68A | Higher PPPM (1500 W), SMC package (larger footprint), 64.6 V VBR, no AEC-Q101 listing | Requires PCB area increase; better for high-energy surges but lacks automotive qualification | Choose when surge energy exceeds 600 W and board space permits larger SMC footprint |
Compared with SMAJ64A-E3/52 and 1.5SMC68A, SM6T68AHE3_A/H uniquely combines AEC-Q101 qualification, 600 W surge rating, and SMB footprint-making it optimal for space-constrained automotive modules where qualification and reliability are mandatory.
Availability
SM6T68AHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line interface protection requiring stable component supply across production lifecycles.
Supply support for SM6T68AHE3_A/H 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 and application-specific performance.
The SM6T Series is engineered for high-reliability transient suppression in automotive, industrial, and communications systems-delivering consistent clamping behavior and AEC-Q101-qualified robustness in compact SMB packages.
FAQ
What is the clamping voltage of SM6T68AHE3_A/H at its rated peak pulse current?
The SM6T68AHE3_A/H has a maximum clamping voltage (VC) of 92.0 V at 6.5 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured with the device mounted on 0.2" × 0.2" copper pads per JEDEC standards and defines the upper voltage limit imposed on protected circuits during surge events. The SM6T68AHE3_A/H maintains this clamping performance across its qualified operating temperature range.
Is SM6T68AHE3_A/H qualified for automotive applications?
Yes, SM6T68AHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation revision 09-Jan-2024. It undergoes rigorous stress testing including temperature cycling, humidity bias, and mechanical shock to meet automotive electronic module requirements. This qualification makes SM6T68AHE3_A/H suitable for engine control units, body electronics, and ADAS sensor interfaces where reliability under vibration and thermal extremes is critical.
What does the "HE3" suffix in SM6T68AHE3_A/H indicate?
The "HE3" suffix in SM6T68AHE3_A/H denotes RoHS-compliant construction with AEC-Q101 qualification. "H" identifies the AEC-Q101 grade, "E3" specifies RoHS-compliant matte tin plating and commercial-grade material content. The "_A/H" revision code indicates manufacturing lot traceability and process version per Vishay's internal documentation control. This distinguishes SM6T68AHE3_A/H from non-automotive variants like SM6T68A-E3/52.
How does the SMB (DO-214AA) package of SM6T68AHE3_A/H affect PCB layout?
The SMB (DO-214AA) package of SM6T68AHE3_A/H requires a 0.220" × 0.155" (5.59 mm × 3.94 mm) pad layout with 0.086" (2.18 mm) minimum cathode/anode pad width. Its low profile (2.20 mm height) enables dense routing beneath the device. Thermal performance depends on copper pad area: RθJA = 100 °C/W assumes 0.2" × 0.2" pads per terminal. For SM6T68AHE3_A/H, minimizing trace inductance between cathode and ground plane is essential to preserve clamping speed.
What is the maximum reverse leakage current for SM6T68AHE3_A/H at its standoff voltage?
At its 58.1 V standoff voltage (VWM), SM6T68AHE3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C ambient temperature. This low leakage ensures minimal power loss and signal interference in always-on automotive and industrial monitoring circuits. Leakage increases with temperature but remains below 10 μA up to +125 °C, as specified in Vishay's thermal derating curves for the SM6T Series.
SM6T68AHE3_A/H 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:
- Obsolete
- 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_A/H FAQ
1.How can I place an order for SM6T68AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T68AHE3_A/H 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_A/H reliable?
The price and inventory of SM6T68AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T68AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SM6T68AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T68AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T68AHE3_A/H?
SM6T68AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T68AHE3_A/H 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_A/H?
For technical support, including SM6T68AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T68AHE3_A/H requirements.
6.How does Aetrix verify that SM6T68AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SM6T68AHE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of SM6T68AHE3_A/H?
All SM6T68AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T68AHE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for SM6T68AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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