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Vishay General Semiconductor - Diodes Division SM6T68CAHE3_B/H
- Part No.:
- SM6T68CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T68CAHE3_B/H.pdf
- Description:
- 600W,68V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,840
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Product details
Overview
SM6T68CAHE3_B/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 68 V breakdown voltage (VBR = 64.6–71.4 V at 1 mA), 600 W peak pulse power (10/1000 μs), and clamping voltage of 92.0 V at 6.5 A. It protects sensitive ICs and MOSFETs against inductive switching transients in automotive sensor signal lines.
For engineers reviewing the SM6T68CAHE3_B/H datasheet, SM6T68CAHE3_B/H pinout, SM6T68CAHE3_B/H application, or SM6T68CAHE3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, low-inductance SMB package, and compliance with J-STD-020 MSL level 1 at 260 °C.
Technical Context
This device operates as a voltage-clamped surge protector in bidirectional mode, with symmetrical breakdown behavior in both polarities. Its glass-passivated junction ensures stable leakage (<1 μA at 58.1 V) and robust ESD immunity, while the low-inductance SMB footprint supports fast transient response under 10/1000 μs waveforms.
Designed for automotive-grade reliability, SM6T68CAHE3_B/H meets AEC-Q101 stress testing requirements and features matte tin-plated leads compliant with JESD 22-B102 whisker testing. Thermal resistance is characterized at RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at 1 mA - defines precise clamping onset threshold for bidirectional overvoltage events |
| VWM | 58.1 V - maximum continuous reverse stand-off voltage before leakage exceeds 1 μA |
| VC @ IPPM | 92.0 V at 6.5 A (10/1000 μs) - actual clamped voltage during 600 W surge, limiting downstream stress |
| PPPM | 600 W - peak pulse power handling capacity under standardized lightning-surge waveform |
| TJ max | +150 °C - enables deployment in under-hood automotive environments without derating |
| Package | SMB (DO-214AA) - surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height for automated placement |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with UL 94 V-0 flammability rating; matte tin-plated leads; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (positive half-cycle) | Accepts surge current during positive voltage excursions; symmetrically identical to cathode in bidirectional operation |
| Cathode | Transient current entry point (negative half-cycle) | Accepts surge current during negative voltage excursions; electrically interchangeable with anode due to bidirectional symmetry |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surge events in automotive ECUs |
| AEC-Q101 qualification | Validates long-term reliability for engine control, ADAS sensors, and body electronics applications |
| Low-inductance SMB package | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving protection fidelity |
| MSL Level 1 (260 °C) | Supports lead-free reflow soldering without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Sensor Signal Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine compartments exposed to load dump and inductive kick. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector interface to shunt transients before reaching ADC input or signal conditioner. Use Value: Limits voltage to ≤92.0 V during 6.5 A surges, preserving sensor accuracy and preventing latch-up in downstream ASICs. | Use Scenario: Safeguarding differential CAN_H/CAN_L lines in industrial gateways subject to EFT and surge coupling from adjacent motor drives. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor mounted across bus pair to clamp common-mode transients without distorting data integrity. Use Value: Maintains signal eye diagram integrity by clamping within 92.0 V while adding <1 pF parasitic capacitance at 1 MHz. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side transient suppression on DC output rails of wall adapters powering USB-C PD devices. IC Role / Device Role / Timing Role: Fast-response TVS placed after DC-DC converter output filter to absorb residual switching spikes and external ESD events. Use Value: Prevents overvoltage damage to USB-PD controllers by clamping 600 W surges within 10/1000 μs window at 92.0 V. | Use Scenario: Primary protection for Ethernet PHY interfaces on telecom line cards exposed to lightning-induced surges on RJ45 ports. IC Role / Device Role / Timing Role: First-stage bidirectional suppressor across transformer-coupled pairs to divert energy before common-mode chokes. Use Value: Handles 600 W surges while maintaining isolation integrity and meeting GR-1089-CORE Level 4 immunity requirements. |
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 | Same VBR range (64.6–71.4 V) and PPPM (600 W), but in smaller SMA (DO-214AC) package with higher RθJA (130 °C/W) | Limited to lower-power or cooler ambient environments; not AEC-Q101 qualified | Select when board space is constrained and automotive qualification is unnecessary |
| 1.5KE68CA | Higher PPPM (1500 W), axial-leaded DO-201 package, slower response due to higher inductance | Suitable for bulk front-end protection but incompatible with SMT automation and high-speed signal lines | Select for cost-sensitive industrial mains-input stages where PCB real estate and assembly method permit through-hole mounting |
Compared with SMAJ68CA and 1.5KE68CA, SM6T68CAHE3_B/H offers AEC-Q101 qualification, optimized SMB thermal performance (RθJA = 100 °C/W), and automated placement compatibility-making it the preferred choice for automotive and high-reliability SMT designs requiring verified surge immunity.
Availability
SM6T68CAHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, and telecom line card designs requiring stable component supply, AEC-Q101 compliance, and repeatable surge protection performance.
Supply support for SM6T68CAHE3_B/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 passive components with emphasis on reliability and application-specific optimization.
The SM6T Series is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where bidirectional clamping, high surge tolerance, and AEC-Q101 validation are mandatory.
FAQ
What is the breakdown voltage tolerance of SM6T68CAHE3_B/H?
The SM6T68CAHE3_B/H has a specified breakdown voltage range of 64.6 V to 71.4 V at 1 mA test current, corresponding to ±10% tolerance around the nominal 68 V rating. This tight VBR distribution ensures consistent clamping behavior across production lots and supports reliable system-level surge margin calculations in designs using SM6T68CAHE3_B/H.
Is SM6T68CAHE3_B/H suitable for protecting CAN FD interfaces?
Yes, SM6T68CAHE3_B/H is suitable for CAN FD interface protection due to its bidirectional clamping, low clamping voltage (92.0 V), and minimal parasitic capacitance. Its SMB package allows placement directly at the connector, and AEC-Q101 qualification confirms suitability for automotive networks. The device does not interfere with CAN FD's 5 Mbps signaling integrity when used per recommended layout guidelines for SM6T68CAHE3_B/H.
Does SM6T68CAHE3_B/H require a heatsink for 5.0 W continuous dissipation?
No, SM6T68CAHE3_B/H does not require an external heatsink for its rated 5.0 W power dissipation at TA = 50 °C because it is designed for transient-not continuous-power handling. Its 5.0 W rating reflects derated steady-state capability; actual operation relies on short-duration pulses (e.g., 10/1000 μs). Thermal design for SM6T68CAHE3_B/H focuses on PCB copper pad area (0.2" × 0.2") rather than heatsinking.
How does the "HE3" suffix in SM6T68CAHE3_B/H affect compliance?
The "HE3" suffix in SM6T68CAHE3_B/H indicates RoHS-compliant construction and AEC-Q101 qualification. Unlike standard "E3" variants, HE3 parts undergo full automotive stress testing (HTGB, HTRB, TCT) and are approved for use in safety-critical vehicle subsystems. This makes SM6T68CAHE3_B/H distinct from commercial-grade equivalents and validates its use in engine control, ADAS, and chassis electronics.
What is the maximum reverse leakage current for SM6T68CAHE3_B/H at rated VWM?
The maximum reverse leakage current for SM6T68CAHE3_B/H is 1.0 μA at its rated stand-off voltage of 58.1 V and TA = 25 °C. This low ID ensures negligible standby power loss and prevents false triggering in high-impedance sensor circuits, supporting stable operation in precision analog monitoring systems using SM6T68CAHE3_B/H.
SM6T68CAHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T68CAHE3_B/H FAQ
1.How can I place an order for SM6T68CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T68CAHE3_B/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_B/H reliable?
The price and inventory of SM6T68CAHE3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for SM6T68CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T68CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T68CAHE3_B/H?
SM6T68CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T68CAHE3_B/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_B/H?
For technical support, including SM6T68CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T68CAHE3_B/H requirements.
6.How does Aetrix verify that SM6T68CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SM6T68CAHE3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of SM6T68CAHE3_B/H?
All SM6T68CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T68CAHE3_B/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_B/H part is unused and in its original packaging.
Return procedure for SM6T68CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T68CAHE3_B/H Tags
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