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Vishay General Semiconductor - Diodes Division SM6T68CAHM3_A/H
- Part No.:
- SM6T68CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T68CAHM3_A/H.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,537
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Product details
Overview
SM6T68CAHM3_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 SM6T68CAHM3_A/H datasheet, SM6T68CAHM3_A/H pinout, SM6T68CAHM3_A/H application, or SM6T68CAHM3_A/H equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, halogen-free RoHS compliance, low thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This TVS operates symmetrically in both directions due to its CA suffix designation, enabling protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at VWM), while the SMB package supports high-current surge handling with minimal parasitic inductance.
The device is rated for continuous power dissipation of 5.0 W at 50 °C on infinite heatsink and operates across -65 °C to +150 °C junction temperature range. It meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements, confirming suitability for high-reliability reflow assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58.1 V - Maximum reverse stand-off voltage before significant conduction begins; defines safe operating window for protected circuitry. |
| VBR min/max | 64.6 V / 71.4 V at 1 mA - Verified breakdown threshold range ensuring consistent clamping onset across production lots. |
| VC @ IPPM | 92.0 V at 6.5 A (10/1000 μs) - Clamping voltage under standardized surge; limits transient energy delivered to downstream ICs. |
| PPPM | 600 W - Peak pulse power rating defining maximum transient energy absorption capability per event. |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance; enables accurate thermal design when mounted on PCB copper pads. |
| TJ max | +150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive environments. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, AEC-Q101 qualified. Cathode/anode terminals are unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | One terminal of symmetrical PN junction; conducts during positive transients relative to cathode reference. |
| Cathode | Transient current entry (forward bias) | Second terminal of symmetrical PN junction; conducts during negative transients relative to anode reference. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal lines without polarity constraints or external circuitry. |
| AEC-Q101 qualification | Validated reliability for automotive applications including engine control modules, ADAS sensors, and body electronics. |
| Low clamping ratio (VC/VBR ≈ 1.36) | Minimizes overvoltage stress on protected ICs by tightly bounding transient excursion above breakdown. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profiles without baking, reducing manufacturing overhead. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine bay environments subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt transients before reaching MCU ADC or LIN transceiver. Use Value: Maintains signal integrity under 10/1000 μs surges up to 600 W while operating within -65 °C to +150 °C ambient range. | Use Scenario: Safeguarding RS-485 or CAN FD transceiver inputs in factory automation PLCs exposed to motor switching noise and ground bounce. IC Role / Device Role / Timing Role: Low-inductance TVS placed adjacent to transceiver pins to limit common-mode transients to <92 V during 6.5 A surges. Use Value: Prevents latch-up or permanent damage to transceivers by clamping within 10 ns response time and sustaining 5.0 W steady-state dissipation. |
| Consumer Power Adapter Input | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters where output rails must survive accidental 100 V transients. IC Role / Device Role / Timing Role: Bidirectional clamp between VBUS and GND to absorb energy from capacitive coupling or feedback faults. Use Value: Halogen-free construction meets IEC 62368-1 flame-retardant requirements while delivering 600 W pulse handling in compact SMB footprint. | Use Scenario: Primary protection stage on Ethernet PHY or xDSL line interface cards subjected to lightning-induced surges per ITU-T K.21. IC Role / Device Role / Timing Role: First-line defense before gas discharge tube or MOV secondary protection, limiting let-through voltage to downstream protection stages. Use Value: 92.0 V clamping at 6.5 A ensures coordination with secondary protectors and avoids premature triggering of higher-threshold devices. |
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 | VWM = 64.0 V, VC = 103 V at 5.8 A, same SMB package but non-AEC-Q101 commercial grade | Lacks automotive qualification and halogen-free certification; suitable for consumer/industrial only | Select when AEC-Q101 and halogen-free compliance are not required and higher VWM tolerance is acceptable. |
| 1.5KE68CA | DO-201 package, larger footprint, VC = 118 V at 5.1 A, 1500 W rating but higher inductance | Through-hole mounting; less suitable for high-speed signal lines due to parasitic inductance | Choose for legacy through-hole designs or where higher pulse energy handling outweighs SMT density constraints. |
Compared with SMBJ64CA and 1.5KE68CA, SM6T68CAHM3_A/H offers tighter clamping (92.0 V vs. ≥103 V), AEC-Q101 qualification, halogen-free compliance, and optimized SMT layout for space-constrained automotive and industrial PCBs-without requiring board redesign.
Availability
SM6T68CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom line card surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SM6T68CAHM3_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, efficiency, and application-specific performance.
The SM6T Series is designed specifically for surface-mount transient voltage suppression in automotive, industrial, and communications systems where bidirectional clamping, AEC-Q101 qualification, and compact SMB packaging are critical.
FAQ
What does the "CA" suffix indicate in SM6T68CAHM3_A/H?
The "CA" suffix in SM6T68CAHM3_A/H denotes a bidirectional configuration, meaning the device clamps transient voltages symmetrically in both polarities. This eliminates polarity concerns during PCB layout and enables protection of AC-coupled or differential signal paths without external diode pairing. The SM6T68CAHM3_A/H achieves this via a back-to-back PN junction structure.
Is SM6T68CAHM3_A/H qualified for automotive use?
Yes, SM6T68CAHM3_A/H is AEC-Q101 qualified, as confirmed by the "HM3" suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is tested for reliability under temperature cycling, humidity, mechanical shock, and high-temperature operating life per AEC-Q101 standards, making it suitable for engine control units, ADAS sensors, and body electronics.
What is the maximum clamping voltage of SM6T68CAHM3_A/H under surge conditions?
The maximum clamping voltage of SM6T68CAHM3_A/H is 92.0 V when subjected to a 10/1000 μs waveform at 6.5 A peak pulse current (IPPM). This value is measured per Figure 1 in Vishay document 88385 and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
How does the SMB (DO-214AA) package of SM6T68CAHM3_A/H compare to SMA or SMC packages?
The SMB package of SM6T68CAHM3_A/H offers a balance of surge capability and board space efficiency: smaller than SMC (DO-214AB) but higher power handling than SMA (DO-214AC). With RθJL = 20 °C/W and 600 W PPPM, it delivers better thermal performance than SMA while maintaining compatibility with standard 0.2" × 0.2" copper pad layouts specified in the datasheet.
Does SM6T68CAHM3_A/H require special PCB layout considerations?
Yes, SM6T68CAHM3_A/H requires adherence to the minimum recommended pad layout: 0.086" × 0.060" (2.18 mm × 1.52 mm) copper pads per terminal, with 0.220" (5.59 mm) center-to-center spacing. Deviating from this reduces thermal dissipation and surge current handling; the device's RθJA = 100 °C/W assumes these pad dimensions per Vishay document 88385.
SM6T68CAHM3_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 (SMB)
SM6T68CAHM3_A/H FAQ
1.How can I place an order for SM6T68CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T68CAHM3_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 SM6T68CAHM3_A/H reliable?
The price and inventory of SM6T68CAHM3_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 SM6T68CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SM6T68CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T68CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T68CAHM3_A/H?
SM6T68CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T68CAHM3_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 SM6T68CAHM3_A/H?
For technical support, including SM6T68CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T68CAHM3_A/H requirements.
6.How does Aetrix verify that SM6T68CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SM6T68CAHM3_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 SM6T68CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SM6T68CAHM3_A/H?
All SM6T68CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T68CAHM3_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 SM6T68CAHM3_A/H part is unused and in its original packaging.
Return procedure for SM6T68CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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