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Vishay General Semiconductor - Diodes Division SM6T68CAHE3/5B
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- Part No.:
- SM6T68CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T68CAHE3/5B.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,021
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Product details
Overview
SM6T68CAHE3/5B 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 - used to protect automotive sensor signal lines against ESD and load-dump transients.
For engineers reviewing the SM6T68CAHE3/5B datasheet, SM6T68CAHE3/5B pinout, SM6T68CAHE3/5B application, or SM6T68CAHE3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (1.58), RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
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 behavior is validated per IEC 61000-4-2 (ESD) and ISO 7637-2 (automotive transients), delivering stable protection without polarity dependence.
Thermal performance is defined by 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 (J-STD-020) and passes JESD 201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58.1 V - maximum reverse stand-off voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (min/max) | 64.6 V / 71.4 V - breakdown occurs within this range at 1 mA; ensures consistent turn-on across production lots |
| VC @ IPPM | 92.0 V at 6.5 A - clamping voltage during 10/1000 μs surge; limits downstream voltage stress to <92 V |
| PPPM | 600 W - peak pulse power handling per 10/1000 μs waveform; supports high-energy automotive transients |
| IFSM | Not applicable - bidirectional device has no forward surge rating; only unidirectional variants specify 100 A |
| TJ Range | –65 °C to +150 °C - enables deployment in under-hood automotive environments and industrial enclosures |
| Package | SMB (DO-214AA) - surface-mount outline with 5.59 mm × 3.94 mm footprint; compatible with standard reflow profiles |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-020 and JESD 22-B102; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | Conducts surge current into device during positive voltage excursion; symmetric with cathode in bidirectional mode |
| Cathode | Transient current entry (negative half-cycle) | Conducts surge current into device during negative voltage excursion; functionally identical to anode in CA-suffix devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and body electronics |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surges without degradation |
| Low clamping ratio (VC/VBR ≈ 1.58) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V/5 V logic interfaces |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life before reflow; eliminates bake requirements in manufacturing |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver inputs and analog sensor outputs (e.g., pressure, temperature) in engine bay modules exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt surge energy before reaching PHY or MCU pins. Use Value: Maintains signal integrity under ±100 V transients while limiting clamped voltage to ≤92 V - preserving 5 V tolerant interface reliability. | Use Scenario: Guarding differential CAN H/L lines in factory automation controllers against ESD events and inductive switching noise from nearby solenoids or motors. IC Role / Device Role / Timing Role: Low-inductance TVS pair (one per line) referenced to common ground, leveraging symmetric breakdown for balanced common-mode suppression. Use Value: Prevents bus lockup during 8 kV contact ESD (IEC 61000-4-2) without altering CAN timing margins or bit error rate. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Safeguarding USB 2.0 D+/D− lines in set-top boxes and smart home gateways against human-body-model ESD during plug insertion. IC Role / Device Role / Timing Role: Bidirectional TVS placed immediately after connector, with minimal trace length to reduce parasitic inductance and preserve 480 Mbps data integrity. Use Value: Clamps 15 kV air discharge to <92 V within nanoseconds - preventing latch-up in USB transceivers without adding capacitance-induced jitter. | Use Scenario: Front-end protection of ADSL/VDSL line drivers in residential modems subjected to lightning-induced surges on outdoor copper pairs. IC Role / Device Role / Timing Role: Primary surge diverter in series with gas discharge tube (GDT) - absorbs fast-rising energy before GDT fires, reducing follow-on current stress. Use Value: Handles 600 W peak pulses per ITU-T K.20/K.21 standards while maintaining <1 nF junction capacitance to avoid DSL signal attenuation. |
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, 64 V VWM, but lower PPPM = 400 W; VC = 103 V @ 3.9 A | Less robust for ISO 7637-2 Pulse 5a (load dump); suitable for consumer-grade ESD-only use | Select when cost sensitivity outweighs automotive surge margin requirements |
| 1.5KE68CA | Through-hole DO-201 package, same 68 V nominal rating, PPPM = 1500 W, VC = 112 V @ 13.4 A | Higher clamping voltage and larger footprint; incompatible with SMT-only assembly | Choose only if board redesign permits axial/DO-201 mounting and higher surge headroom is mandatory |
Compared with SMAJ64CA and 1.5KE68CA, the SM6T68CAHE3/5B delivers optimal balance of AEC-Q101 compliance, 600 W surge capacity, SMB footprint, and 92 V clamping - making it the preferred choice for space-constrained automotive and industrial SMT designs requiring certified reliability.
Availability
SM6T68CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, consumer USB interfaces, and telecom DSL line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SM6T68CAHE3/5B 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 automotive, industrial, and computing applications.
The SM6T Series is designed specifically for robust, surface-mount transient suppression in harsh environments - targeting AEC-Q101-compliant automotive electronics and high-reliability industrial systems where bidirectional clamping and low clamping ratio are essential.
FAQ
What does the "CA" suffix indicate in SM6T68CAHE3/5B?
The "CA" suffix denotes a bidirectional configuration - meaning the SM6T68CAHE3/5B provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional "A" variants, it has no cathode marking and functions identically in either polarity, making it ideal for AC-coupled or floating signal lines such as CAN, LIN, or USB differential pairs.
Is SM6T68CAHE3/5B qualified for automotive applications?
Yes, SM6T68CAHE3/5B is AEC-Q101 qualified, as confirmed by its "HE3" suffix and documentation in Vishay's SM6T datasheet (Rev. 09-Jan-2024, Doc. #88385). This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock - validating its suitability for engine control units, ADAS sensors, and body electronics deployed in vehicles.
What is the maximum clamping voltage of SM6T68CAHE3/5B under surge conditions?
The SM6T68CAHE3/5B has a maximum clamping voltage (VC) of 92.0 V at 6.5 A peak pulse current using the 10/1000 μs waveform. This value is measured per Figure 1 in the official datasheet and represents the upper limit of voltage seen by downstream circuitry during standardized surge events - critical for ensuring protected ICs remain within absolute maximum ratings.
Does SM6T68CAHE3/5B require special PCB layout considerations?
Yes - for optimal performance, SM6T68CAHE3/5B must be mounted on minimum recommended pad layout: 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Short, direct traces to protected lines and low-inductance grounding minimize voltage overshoot during fast transients, especially critical for ESD and lightning surge suppression.
How does the "HE3/5B" ordering code affect SM6T68CAHE3/5B packaging and compliance?
The "HE3" suffix indicates RoHS-compliant and AEC-Q101 qualified construction, while "/5B" specifies 13-inch diameter plastic tape and reel packaging containing 3200 units. This format supports high-volume SMT assembly and ensures full traceability, halogen-free materials, and compliance with automotive supply chain requirements per JESD 201 Class 2 whisker testing.
SM6T68CAHE3/5B 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:
- -
- 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)
SM6T68CAHE3/5B FAQ
1.How can I place an order for SM6T68CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T68CAHE3/5B 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 SM6T68CAHE3/5B reliable?
The price and inventory of SM6T68CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T68CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SM6T68CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T68CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T68CAHE3/5B?
SM6T68CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T68CAHE3/5B 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 SM6T68CAHE3/5B?
For technical support, including SM6T68CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T68CAHE3/5B requirements.
6.How does Aetrix verify that SM6T68CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T68CAHE3/5B 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 SM6T68CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SM6T68CAHE3/5B?
All SM6T68CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T68CAHE3/5B, 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 SM6T68CAHE3/5B part is unused and in its original packaging.
Return procedure for SM6T68CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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