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Vishay General Semiconductor - Diodes Division SM6T68CAHM3_A/I
- Part No.:
- SM6T68CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T68CAHM3_A/I.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,515
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Product details
Overview
SM6T68CAHM3_A/I 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 standoff voltage (VWM), 64.6–71.4 V breakdown voltage (VBR), and clamping to ≤92.0 V at 6.5 A peak pulse current - used for ESD and surge protection on automotive sensor signal lines.
For engineers reviewing the SM6T68CAHM3_A/I datasheet, SM6T68CAHM3_A/I pinout, SM6T68CAHM3_A/I application, or SM6T68CAHM3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (92.0 V / 64.6 V ≈ 1.42), and SMB thermal resistance (RθJA = 100 °C/W).
Technical Context
The SM6T68CAHM3_A/I is a glass-passivated, bidirectional TVS diode optimized for fast response (<1 ns) to transient overvoltages induced by inductive switching or ESD events. Its symmetrical I-V characteristics ensure identical clamping in both polarities, with no polarity marking required on the SMB package.
Designed for surface-mount automated assembly, it meets J-STD-020 MSL Level 1 (260 °C peak reflow) and supports junction temperatures from –65 °C to +150 °C. The device operates without bias and requires no external control circuitry - functioning purely as a voltage-clamped shunt protector.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58.1 V - Maximum continuous reverse operating voltage before leakage exceeds 1 μA; defines safe signal line operating margin. |
| VBR (min/max) | 64.6 V / 71.4 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on before system damage occurs. |
| VC @ IPPM | 92.0 V at 6.5 A (10/1000 μs) - Clamping voltage under standardized surge; limits downstream IC stress during transients. |
| PPPM | 600 W - Peak pulse power handling capability; enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments. |
| Package | SMB (DO-214AA) - Industry-standard surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with standard pick-and-place. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability per stress test requirements including HTOL, TCT, and ESD HBM ≥ 8 kV. |
Pinout & Package
SMB (DO-214AA) package: cathode/anode terminals are symmetrically arranged with no polarity marking; bidirectional operation eliminates need for orientation-sensitive placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Shunts negative-going surges to ground; forms one side of symmetrical clamping path. |
| Cathode | Transient current entry (positive polarity) | Shunts positive-going surges to ground; completes bidirectional clamping loop with Anode. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both directions - eliminates polarity concerns in AC-coupled or floating signal paths. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive use including temperature cycling, high-temperature operating life, and ESD robustness - supports ASIL-B system designs. |
| Halogen-free & RoHS-compliant | Meets JEDEC JS709E and IPC-1752A material declarations - satisfies Tier-1 automotive and industrial environmental compliance mandates. |
| Low clamping ratio (1.42) | VC/VBR(min) = 92.0/64.6 - tighter voltage limiting than typical TVS devices, reducing margin needed for protected ICs. |
| MSL Level 1 moisture sensitivity | Unlimited floor life at ≤30 °C/60% RH - allows direct use from dry pack without baking prior to reflow. |
Applications
| Automotive Occupant Detection System | Industrial CAN Transceiver Protection |
|---|---|
Use Scenario: Protecting capacitive seat sensors from load-dump-induced transients during vehicle battery disconnect/reconnect events. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed across sensor differential pair to limit voltage excursions to <92 V during 100 V/50 ms load dump pulses. Use Value: Prevents false trigger or latch-up in analog front-end ASICs by maintaining signal integrity within ±60 V common-mode range. |
Use Scenario: Safeguarding CANH/CANL pins of ISO 11898-2 transceivers against ESD (IEC 61000-4-2) and burst noise (IEC 61000-4-4). IC Role / Device Role / Timing Role: Low-inductance TVS placed directly at connector interface to clamp fast transients before reaching transceiver input stage. Use Value: Enables >8 kV contact ESD immunity without degrading CAN bus signal rise/fall times due to sub-100 pF junction capacitance. |
| Consumer Smart Appliance Motor Control | Telecom PoE Data Line Protection |
Use Scenario: Shielding microcontroller GPIOs connected to brushed DC motor feedback circuits from commutation spikes. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to MCU pins to absorb <100 ns spikes generated by motor brush arcing. Use Value: Eliminates need for software debounce or hardware RC filtering by suppressing transients below MCU input damage threshold. |
Use Scenario: Protecting Ethernet PHY data pairs (TD+/RD+) in IEEE 802.3af/at powered devices from surge coupling via PoE injectors. IC Role / Device Role / Timing Role: Bidirectional clamp integrated into magnetics module PCB layout to suppress common-mode surges up to 1 kV. Use Value: Maintains 100BASE-TX signal integrity (≤100 MHz bandwidth) while meeting UL 60950-1 surge withstand 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 |
|---|---|---|---|
| SMAJ64CA | Same VWM (58 V), but lower PPPM (400 W); SMA package (larger RθJA = 130 °C/W) | Limited to non-automotive industrial use; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and higher surge margin. |
| 1.5KE68CA | Higher PPPM (1500 W), axial-leaded DO-201 package; VC = 112 V at 13.1 A | Requires through-hole assembly; unsuitable for high-density SMT layouts | Choose only for legacy through-hole designs needing higher single-pulse energy absorption. |
Compared with SMAJ64CA and 1.5KE68CA, SM6T68CAHM3_A/I delivers AEC-Q101 assurance, SMB space savings, and optimal clamping ratio (1.42) for modern automotive and compact industrial PCBs - making it the preferred choice where qualification, size, and voltage limiting precision are jointly critical.
Availability
SM6T68CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN networks, consumer appliance motor controls, and telecom PoE data line protection requiring stable component supply and full traceability.
Supply support for SM6T68CAHM3_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, efficiency, and application-specific optimization.
The SM6T Series is engineered for high-reliability transient suppression in automotive, industrial, and communications systems - delivering consistent clamping performance across temperature and lifetime while meeting stringent environmental and qualification standards.
FAQ
What is the clamping voltage of SM6T68CAHM3_A/I at its rated peak pulse current?
The SM6T68CAHM3_A/I clamps to a maximum of 92.0 V when subjected to a 10/1000 μs waveform peak pulse current of 6.5 A. 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.
Is SM6T68CAHM3_A/I suitable for automotive applications?
Yes, SM6T68CAHM3_A/I is AEC-Q101 qualified (denoted by HM3 suffix) and halogen-free, making it approved for automotive use in engine control units, body electronics, and ADAS sensor modules. It passes high-temperature operating life, thermal cycling, and ESD tests required for under-hood and cabin environments.
How does the bidirectional design of SM6T68CAHM3_A/I affect PCB layout?
The bidirectional nature of SM6T68CAHM3_A/I means no polarity marking or orientation is required during placement - simplifying automated assembly and eliminating risk of reverse installation. Layout requires symmetric trace routing to both terminals to maintain balanced impedance and minimize inductance in the clamping path.
What is the standoff voltage rating for SM6T68CAHM3_A/I?
The standoff voltage (VWM) of SM6T68CAHM3_A/I is 58.1 V - the maximum DC or RMS voltage that can be continuously applied without exceeding 1 μA reverse leakage current. This rating ensures compatibility with 48 V automotive systems and industrial 48 VDC buses.
Does SM6T68CAHM3_A/I require a heatsink for standard operation?
No, SM6T68CAHM3_A/I is designed for operation without an external heatsink under typical conditions. Its SMB package provides sufficient thermal dissipation for transient events, with RθJA = 100 °C/W and 5.0 W steady-state power dissipation on infinite heatsink - adequate for intermittent surge duty cycles.
SM6T68CAHM3_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 (SMB)
SM6T68CAHM3_A/I FAQ
1.How can I place an order for SM6T68CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T68CAHM3_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 SM6T68CAHM3_A/I reliable?
The price and inventory of SM6T68CAHM3_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 SM6T68CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T68CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T68CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T68CAHM3_A/I?
SM6T68CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T68CAHM3_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 SM6T68CAHM3_A/I?
For technical support, including SM6T68CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T68CAHM3_A/I requirements.
6.How does Aetrix verify that SM6T68CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T68CAHM3_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 SM6T68CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T68CAHM3_A/I?
All SM6T68CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T68CAHM3_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 SM6T68CAHM3_A/I part is unused and in its original packaging.
Return procedure for SM6T68CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T68CAHM3_A/I Tags
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