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Vishay General Semiconductor - Diodes Division SM6T68CAHE3_A/H
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- Part No.:
- SM6T68CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T68CAHE3_A/H.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,815
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Product details
Overview
SM6T68CAHE3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 600 W peak pulse power (10/1000 μs), 58.1 V stand-off voltage (VWM), and 92.0 V maximum clamping voltage (VC) at 6.5 A peak pulse current. It provides robust ESD and surge protection for automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SM6T68CAHE3_A/H datasheet, SM6T68CAHE3_A/H pinout, SM6T68CAHE3_A/H application, or SM6T68CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.31), RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 64.6–71.4 V (min/max) under 1 mA test current. Its clamping performance is characterized at 6.5 A IPPM (10/1000 μs), delivering 92.0 V VC, enabling reliable protection of 5 V–24 V logic and analog circuits against ISO 7637-2 and IEC 61000-4-5 transients.
Thermally, it features RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), supporting operation from –65 °C to +150 °C junction temperature. The device meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101, confirming suitability for automotive under-hood and body electronics applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58.1 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected circuit's normal operating range. |
| VBR (min/max) | 64.6 V / 71.4 V - Breakdown occurs within this band at 1 mA; defines onset of clamping action for overvoltage events. |
| VC @ IPPM | 92.0 V at 6.5 A (10/1000 μs) - Clamped voltage seen by downstream circuit during worst-case surge; determines stress on protected ICs. |
| PPPM | 600 W - Peak transient energy absorption capacity; supports compliance with automotive load-dump and inductive-switching immunity standards. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in high-ambient environments such as engine control units and powertrain modules. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; optimized for high-density PCB layouts and reflow soldering. |
Pinout & Package
SMB (DO-214AA) package: two-terminal, symmetrical bidirectional device with no polarity marking; terminals are matte tin-plated leads compatible with J-STD-002 and JESD 22-B102 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient conduction path | No functional distinction between terminals; either terminal may connect to protected line or ground-enables flexible layout without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-required for ECUs, ADAS sensors, and infotainment interfaces. |
| 600 W peak pulse power (10/1000 μs) | Withstands high-energy transients from inductive load switching (e.g., solenoids, relays) without degradation or failure. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage overshoot during clamping-critical for safeguarding 3.3 V and 5 V microcontrollers and CAN transceivers. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free reflow profiles without preconditioning-reduces manufacturing complexity and cost. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN bus and analog sensor outputs (e.g., pressure, temperature) in engine control modules from battery dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground to shunt transient energy before it reaches the sensor ASIC or MCU ADC input. Use Value: Prevents latch-up or permanent damage to precision analog front-ends while maintaining signal integrity below 92.0 V during 6.5 A surges. | Use Scenario: Safeguarding RS-485 transceiver data lines in factory automation PLCs exposed to motor drive noise and electrostatic discharge. IC Role / Device Role / Timing Role: Transient suppression element connected across differential pair (A/B) and ground to limit common-mode and differential-mode overvoltages. Use Value: Ensures uninterrupted communication during 4 kV ESD events and 1 kV surge pulses per IEC 61000-4-5, preserving data link uptime. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side DC input protection in USB-C PD adapters against coupling from primary-side transients and hot-plug surges. IC Role / Device Role / Timing Role: Standoff-clamp TVS placed between +VOUT and GND to absorb fast-rising spikes before they reach DC-DC controller ICs. Use Value: Maintains output regulation stability by limiting voltage excursions to ≤92.0 V during 10/1000 μs pulses up to 600 W-prevents false OVP shutdowns. | Use Scenario: Primary protection stage for Ethernet PHY interface on telecom base station line cards subjected to lightning-induced surges. IC Role / Device Role / Timing Role: First-line bidirectional clamp on MDI pairs, coordinated with gas discharge tubes and series impedance for staged protection. Use Value: Reduces let-through energy to downstream protection stages by clamping at 92.0 V, extending system-level surge withstand to ≥6 kV (IEC 61000-4-5). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64CA | Same SMB package, but lower PPPM (400 W), higher VC (103 V at 5.8 A), non-AEC-Q101 qualified | Limited to commercial-grade consumer/industrial use; not approved for automotive safety-critical nodes | Select when cost sensitivity outweighs automotive qualification and 600 W surge margin is unnecessary. |
| 1.5KE68CA | Higher-power DO-201 package (1500 W), larger footprint (7.11 mm × 5.59 mm), VC = 112 V at 13.4 A | Requires board redesign; suited for high-energy AC mains or power supply input stages-not compact signal-line protection | Choose only when surge threat level exceeds 600 W and PCB space permits larger through-hole or axial-leaded alternatives. |
Compared with SMAJ64CA and 1.5KE68CA, SM6T68CAHE3_A/H delivers optimal balance of AEC-Q101 compliance, 600 W surge handling, SMB footprint efficiency, and low 92.0 V clamping-making it the preferred choice for space-constrained automotive and industrial signal-line protection where qualification and clamping performance are jointly critical.
Availability
SM6T68CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, and telecom line card designs requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101 qualified parts.
Supply support for SM6T68CAHE3_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, thermal performance, and automotive qualification.
The SM6T Series is engineered specifically for surface-mount transient suppression in harsh environments-designed to meet AEC-Q101 and deliver consistent clamping behavior across temperature and surge repetition rates.
FAQ
What is the clamping voltage of SM6T68CAHE3_A/H at its rated peak pulse current?
The SM6T68CAHE3_A/H has a maximum clamping voltage (VC) of 92.0 V at 6.5 A peak pulse current with a 10/1000 μs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SM6T68CAHE3_A/H maintains this clamping performance across its full operating temperature range, ensuring predictable protection behavior in automotive and industrial applications.
Is SM6T68CAHE3_A/H qualified for automotive applications?
Yes, SM6T68CAHE3_A/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in datasheet 88385. This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD robustness-validating its suitability for automotive powertrain, body electronics, and ADAS sensor modules. The SM6T68CAHE3_A/H meets all required lifetime and reliability benchmarks for under-hood and cabin-mounted systems.
What is the standoff voltage rating for SM6T68CAHE3_A/H?
The standoff voltage (VWM) for SM6T68CAHE3_A/H is 58.1 V, representing the maximum continuous reverse voltage the device can block without exceeding 1 μA leakage current. This rating ensures compatibility with 48 V automotive systems and 24 V industrial control buses while providing sufficient margin above nominal rail voltages. The SM6T68CAHE3_A/H maintains this VWM specification across its full operating temperature range.
Does SM6T68CAHE3_A/H have polarity markings on the package?
No, SM6T68CAHE3_A/H does not feature polarity markings because it is a bidirectional TVS diode. The SMB (DO-214AA) package has symmetrical terminals with identical electrical behavior in both directions-eliminating orientation constraints during PCB layout and automated placement. This design simplifies routing and reduces assembly errors compared to unidirectional variants like SM6T68A, which use a cathode band marking.
What is the thermal resistance from junction to ambient for SM6T68CAHE3_A/H?
The typical thermal resistance from junction to ambient (RθJA) for SM6T68CAHE3_A/H is 100 °C/W, measured on a standard 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad layout per JEDEC standards. This value reflects real-world PCB thermal performance and informs derating calculations for sustained power dissipation. The SM6T68CAHE3_A/H also exhibits RθJL = 20 °C/W (junction-to-lead), supporting effective heat transfer to solder joints in high-reliability assemblies.
SM6T68CAHE3_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:
- -
- 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_A/H FAQ
1.How can I place an order for SM6T68CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T68CAHE3_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 SM6T68CAHE3_A/H reliable?
The price and inventory of SM6T68CAHE3_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 SM6T68CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SM6T68CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T68CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T68CAHE3_A/H?
SM6T68CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T68CAHE3_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 SM6T68CAHE3_A/H?
For technical support, including SM6T68CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T68CAHE3_A/H requirements.
6.How does Aetrix verify that SM6T68CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SM6T68CAHE3_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 SM6T68CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SM6T68CAHE3_A/H?
All SM6T68CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T68CAHE3_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 SM6T68CAHE3_A/H part is unused and in its original packaging.
Return procedure for SM6T68CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T68CAHE3_A/H Tags
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