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Vishay General Semiconductor - Diodes Division SM6T68CAHE3_A/I
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- Part No.:
- SM6T68CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T68CAHE3_A/I.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,828
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Product details
Overview
SM6T68CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 68 V breakdown voltage (VBR = 64.6–71.4 V), 58.1 V stand-off voltage (VWM), 92.0 V max clamping voltage (VC) at 6.5 A, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SM6T68CAHE3_A/I datasheet, SM6T68CAHE3_A/I pinout, SM6T68CAHE3_A/I application, or SM6T68CAHE3_A/I equivalent, key selection considerations include bidirectional clamping symmetry, low clamping ratio (VC/VBR ≈ 1.32), AEC-Q101 qualification status, SMB thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The SM6T68CAHE3_A/I operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at VWM), while the low-inductance SMB package supports fast response to sub-microsecond transients.
It is rated for non-repetitive 10/1000 μs waveform surges up to 600 W and 6.5 A peak pulse current, with derating above TA = 25 °C per Fig. 2. Junction temperature range spans −65 °C to +150 °C, and it meets MSL Level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V - defines precise avalanche onset threshold in both directions |
| VWM | 58.1 V - maximum continuous reverse voltage before leakage exceeds 1 μA |
| VC @ IPPM | 92.0 V @ 6.5 A - clamped voltage during 600 W transient, limiting downstream stress |
| PPPM | 600 W - peak surge power handling capability with standard 10/1000 μs waveform |
| TJ max | +150 °C - enables operation in under-hood automotive environments |
| Qualification | AEC-Q101 qualified - validated for automotive reliability including temperature cycling and HTRB |
| RθJA | 100 °C/W - thermal resistance from junction to ambient on recommended 5.0 mm × 5.0 mm pads |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking. Cathode/anode terminals are symmetrical; device functions identically in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | One terminal of symmetrical avalanche junction; connects to protected line or ground reference |
| Cathode | Transient return path (bidirectional) | Second terminal of symmetrical avalanche junction; functionally identical to Anode in CA devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges on 12 V systems |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensors |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage exposure to downstream ICs compared to higher-ratio TVS devices |
| MSL Level 1 | Supports lead-free reflow up to 260 °C without preconditioning or dry-pack requirements |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine compartments exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient excursions to ≤92.0 V, preserving ADC integrity and preventing latch-up in 5 V or 3.3 V signal chains. | Use Scenario: Safeguarding CAN_H/CAN_L differential pair against ESD and coupled surges in factory automation controllers. IC Role / Device Role / Timing Role: Paired SM6T68CAHE3_A/I devices (one per line) referenced to common ground. Use Value: Maintains CAN bus signal integrity during 8 kV contact ESD events by clamping within 1 ns, with no data corruption. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Low-capacitance TVS placed after primary polymer-based surge limiter. Use Value: Adds <1 μA leakage at 5.8 V VWM, ensuring USB suspend mode compliance while clamping ±15 kV air discharge. | Use Scenario: Front-end surge suppression on POTS/DSL line cards subjected to lightning-induced transients. IC Role / Device Role / Timing Role: Bidirectional clamp installed across tip/ring before line transformer input. Use Value: Handles 600 W 10/1000 μs surges per ITU-T K.20/K.21, limiting voltage to ≤92.0 V to protect SLIC and codec ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA | Same SMB package, 64 V VBR (60.8–67.2 V), 1000 W PPPM, no AEC-Q101 listing in base grade | Higher power rating but lacks automotive qualification; requires separate AEC-Q101 variant (e.g., SMBJ64CAHE3) | Select when higher surge margin is needed and automotive qualification is not required |
| 1.5KE68CA | DO-201 package (axial leaded), same 68 V VBR, 1500 W PPPM, not surface-mountable | Not compatible with automated SMT assembly; used in through-hole prototyping or legacy designs | Select only for manual assembly or where board space allows axial footprint |
Compared with SMBJ64CA and 1.5KE68CA, the SM6T68CAHE3_A/I offers optimized balance of AEC-Q101 compliance, SMB footprint, and 600 W surge capability-making it preferred for volume automotive SMT production where qualification, size, and process compatibility are jointly critical.
Availability
SM6T68CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer USB ports, and telecom DSL line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SM6T68CAHE3_A/I 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 robust transient suppression in automotive, industrial, and communications systems-designed to meet stringent AEC-Q101, IEC 61000-4-2/4-5, and ISO 7637-2 requirements with consistent SMB form factor.
FAQ
What is the breakdown voltage tolerance for SM6T68CAHE3_A/I?
The SM6T68CAHE3_A/I has a specified breakdown voltage range of 64.6 V to 71.4 V at 1.0 mA test current (IT). This ±5% tolerance ensures predictable clamping onset across production lots and operating temperatures, critical for maintaining consistent protection margins in automotive and industrial designs.
Is SM6T68CAHE3_A/I suitable for protecting CAN FD bus lines?
Yes, SM6T68CAHE3_A/I is suitable for CAN FD protection due to its bidirectional symmetry, 92.0 V clamping voltage at 6.5 A, and fast response time. Its VWM of 58.1 V exceeds typical CAN FD common-mode voltage limits, allowing safe operation without interfering with 2 V differential signaling or 12 V bus biasing.
Does SM6T68CAHE3_A/I require a heatsink for 5.0 W continuous dissipation?
No-SM6T68CAHE3_A/I is rated for 5.0 W power dissipation on an infinite heatsink at TA = 50 °C, but its RθJA of 100 °C/W means it relies on PCB copper area (minimum 5.0 mm × 5.0 mm per pad) for thermal management. No external heatsink is needed in standard SMT layouts meeting Vishay's mounting recommendations.
How does the AEC-Q101 qualification of SM6T68CAHE3_A/I impact automotive design validation?
The AEC-Q101 qualification of SM6T68CAHE3_A/I eliminates need for component-level stress testing in automotive programs-it has passed accelerated life tests including HTGB, HTRB, temperature cycling, and ESD. This reduces qualification time and risk for ECUs, ADAS modules, and body control units using SM6T68CAHE3_A/I in front-end protection circuits.
What is the maximum reverse leakage current of SM6T68CAHE3_A/I at its stand-off voltage?
The maximum reverse leakage current (ID) of SM6T68CAHE3_A/I is 1.0 μA at its rated stand-off voltage (VWM) of 58.1 V and TA = 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and ensures minimal power loss in always-on automotive subsystems.
SM6T68CAHE3_A/I 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/I FAQ
1.How can I place an order for SM6T68CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T68CAHE3_A/I 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/I reliable?
The price and inventory of SM6T68CAHE3_A/I 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/I is usually 5 days.
3.What payment methods are accepted for SM6T68CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T68CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T68CAHE3_A/I?
SM6T68CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T68CAHE3_A/I 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/I?
For technical support, including SM6T68CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T68CAHE3_A/I requirements.
6.How does Aetrix verify that SM6T68CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T68CAHE3_A/I 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/I meets industry standards.
7.What is the process for return or replacement of SM6T68CAHE3_A/I?
All SM6T68CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T68CAHE3_A/I, 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/I part is unused and in its original packaging.
Return procedure for SM6T68CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T68CAHE3_A/I Tags
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