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Vishay General Semiconductor - Diodes Division SM6T68AHM3_A/I
- Part No.:
- SM6T68AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T68AHM3_A/I.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,655
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Product details
Overview
SM6T68AHM3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping ESD and surge transients on power/signal lines. It features 68 V breakdown voltage (VBR = 64.6–71.4 V at 1 mA), 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 electronics protection.
For engineers reviewing the SM6T68AHM3_A/I datasheet, SM6T68AHM3_A/I pinout, SM6T68AHM3_A/I application, or SM6T68AHM3_A/I equivalent, this page delivers verified electrical parameters, automotive-grade reliability data, SMB package thermal and layout guidance, and direct alternative part comparisons for circuit protection design-in.
Technical Context
The SM6T68AHM3_A/I operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response to transient overvoltages. Its clamping action begins at VWM = 58.1 V and fully engages at VBR = 64.6–71.4 V (1 mA test current), delivering VC ≤ 92.0 V under 6.5 A (10/1000 μs) surge current.
Designed for surface-mount automated assembly, it meets MSL Level 1 (260 °C reflow peak), JESD201 Class 2 whisker resistance, and UL 94 V-0 flammability. The halogen-free, RoHS-compliant construction and AEC-Q101 qualification confirm suitability for under-hood automotive modules and industrial control I/O protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at 1 mA - defines precise avalanche onset range for reliable overvoltage triggering |
| VWM | 58.1 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | 92.0 V at 6.5 A (10/1000 μs) - clamping voltage limiting downstream IC stress during surge events |
| PPPM | 600 W - peak transient power handling capacity per standard 10/1000 μs waveform |
| TJ max | +150 °C - maximum junction temperature enabling operation in high-ambient automotive environments |
| RθJA | 100 °C/W - thermal resistance indicating need for minimum 5.0 mm × 5.0 mm copper pads for rated power dissipation |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Polarity marked by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal avalanche junction | Connected to protected line; conducts when transient exceeds VBR, shunting current to ground |
| Anode | Cathode of internal avalanche junction | Typically connected to system ground; completes low-inductance surge path during clamping |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges in 12 V automotive systems |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage overshoot during transient suppression, reducing risk to downstream MOSFETs or MCUs |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow without popcorn or delamination, compatible with standard SMT lines |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller GPIOs from load-dump and inductive switching transients in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LIN line and ground, clamping transients within 1 ns response time. Use Value: Maintains VC ≤ 92.0 V during 6.5 A surge, preventing damage to 5 V tolerant transceivers while meeting ISO 16750-2 requirements. | Use Scenario: Safeguarding 24 V DC digital input channels in programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on input front-end, absorbing repetitive 10/1000 μs transients up to 600 W without degradation. Use Value: Withstands >1000 surges at rated power due to glass-passivated junction, extending maintenance intervals in factory automation. |
| Automotive Infotainment Power Rail | Consumer Appliance Motor Driver Protection |
Use Scenario: Clamping voltage spikes on 5 V/3.3 V power rails feeding infotainment head units during battery disconnect/reconnect events. IC Role / Device Role / Timing Role: Unidirectional TVS mounted directly at LDO input, providing low-inductance path to chassis ground. Use Value: Low RθJA (100 °C/W) and 150 °C TJ max allow stable operation in thermally constrained dash-mounted enclosures. | Use Scenario: Protecting gate drivers and MCU pins in smart washing machine motor control boards from brush-commutator noise and pump back-EMF. IC Role / Device Role / Timing Role: TVS placed across half-bridge FET source-drain nodes and MCU analog inputs. Use Value: Halogen-free HM3 construction complies with IEC 62368-1 material requirements for white goods safety certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ68A-E3/52 | Same VBR range (64.6–71.4 V), but lower PPPM = 400 W; SMA package (DO-214AC), larger RθJA = 125 °C/W | Not AEC-Q101 qualified; suited for commercial-grade consumer/industrial use only | Select when cost sensitivity outweighs automotive qualification and higher surge margin |
| SMCJ68A-QH | Higher PPPM = 1500 W; same SMB package; AEC-Q101 qualified; VC = 113 V @ 13.3 A | Better for severe load-dump (ISO 7637-2 Pulse 5b); larger clamping voltage requires margin check on protected ICs | Select when protecting 12 V systems subject to 120 V/100 ms load-dump events requiring >1 kW surge handling |
Compared with SMAJ68A-E3/52 and SMCJ68A-QH, the SM6T68AHM3_A/I provides optimal balance of AEC-Q101 compliance, 600 W surge rating, and compact SMB footprint-making it ideal for space-constrained automotive modules where 92.0 V clamping and halogen-free materials are mandatory.
Availability
SM6T68AHM3_A/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and consumer appliance motor control requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SM6T68AHM3_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 performance.
The SM6T Series is engineered for robust transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, low clamping, and automated assembly compatibility are critical.
FAQ
What is the breakdown voltage tolerance for SM6T68AHM3_A/I?
The SM6T68AHM3_A/I 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 tolerance is guaranteed per Vishay's datasheet Document Number 88385, Revision 09-Jan-2024, and applies to all units shipped under the HM3 automotive qualification.
Is SM6T68AHM3_A/I suitable for bidirectional transient protection?
No, SM6T68AHM3_A/I is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the CA-suffixed variant (e.g., SM6T68CA). Using SM6T68AHM3_A/I in bidirectional AC signal paths would result in forward conduction during negative half-cycles, potentially damaging the device or circuit.
Does SM6T68AHM3_A/I require a heatsink for 600 W surge handling?
No external heatsink is required for single-event 600 W surge handling, as the 10/1000 μs pulse duration limits total energy. However, the datasheet specifies that rated power derating relies on mounting the SM6T68AHM3_A/I on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve the stated RθJA = 100 °C/W and prevent junction overheating during repeated surges.
What does the "HM3" suffix signify in SM6T68AHM3_A/I?
"HM3" denotes halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. The "H" indicates AEC-Q101 qualification, "M" signifies halogen-free molding compound, and "3" confirms RoHS compliance. The "_A/I" denotes packaging: "A" = revision code, "I" = 13" tape-and-reel (3200 pcs per reel), per Vishay's ordering information table.
How does SM6T68AHM3_A/I compare to SM6T68A-E3/52 in terms of automotive use?
SM6T68AHM3_A/I is AEC-Q101 qualified and halogen-free, making it approved for automotive under-hood and cabin applications. In contrast, SM6T68A-E3/52 is commercial-grade (E3 suffix), not AEC-Q101 qualified, and lacks halogen-free certification-therefore unsuitable for automotive production where reliability and material compliance are mandated.
SM6T68AHM3_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:
- 1
- Bidirectional Channels:
- -
- 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)
SM6T68AHM3_A/I FAQ
1.How can I place an order for SM6T68AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T68AHM3_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 SM6T68AHM3_A/I reliable?
The price and inventory of SM6T68AHM3_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 SM6T68AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SM6T68AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T68AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T68AHM3_A/I?
SM6T68AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T68AHM3_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 SM6T68AHM3_A/I?
For technical support, including SM6T68AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T68AHM3_A/I requirements.
6.How does Aetrix verify that SM6T68AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SM6T68AHM3_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 SM6T68AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SM6T68AHM3_A/I?
All SM6T68AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T68AHM3_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 SM6T68AHM3_A/I part is unused and in its original packaging.
Return procedure for SM6T68AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T68AHM3_A/I Tags
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