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Vishay General Semiconductor - Diodes Division 1.5SMC6.8AHM3/I
- Part No.:
- 1.5SMC6.8AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8AHM3/I.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,383
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Product details
Overview
1.5SMC6.8AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 6.8 V breakdown voltage (VBR min = 6.45 V), 5.8 V stand-off voltage (VWM), 10.5 V clamping voltage at 143 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates across -65 °C to +150 °C junction temperature range - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC6.8AHM3/I datasheet, 1.5SMC6.8AHM3/I pinout, 1.5SMC6.8AHM3/I application, or 1.5SMC6.8AHM3/I equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, AEC-Q101 qualification status, clamping performance under 10/1000 µs transients, and halogen-free RoHS compliance per HM3 suffix.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ps) and low incremental surge resistance, enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients. Its unidirectional configuration provides forward conduction capability with 200 A IFSM (8.3 ms half-sine), while maintaining <1000 µA reverse leakage at VWM.
The device is rated for 1500 W peak pulse power under standardized 10/1000 µs waveform conditions, derated linearly above 25 °C ambient per Fig. 2, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA test current - defines reliable avalanche initiation threshold for overvoltage clamping |
| VWM | 5.8 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 10.5 V at 143 A - clamped voltage during 1500 W transient, limiting stress on downstream ICs |
| IPPM | 143 A - peak pulse current handling capacity under 10/1000 µs waveform |
| PPPM | 1500 W - transient energy absorption capability without failure |
| TJ max | +150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1, 260 °C reflow compatible. Polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to protected line's lower-potential side (e.g., ground-referenced signal or return path) |
| Cathode | Avalanche conduction terminal / Clamping node | Connected to protected line's higher-potential side (e.g., VCC, data line, or supply rail); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables single-device protection against severe ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units, ADAS sensors, and body electronics |
| Halogen-free & RoHS-compliant | Meets global environmental compliance requirements for industrial and consumer end equipment |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes voltage overshoot during transient events, improving system-level immunity margin |
| Fast response time & glass passivation | Ensures sub-nanosecond turn-on for ESD (IEC 61000-4-2) and fast-rising transients |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive kickback in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground to clamp transients before they reach sensitive input circuitry. Use Value: Limits clamped voltage to 10.5 V, well below typical 16 V absolute maximum ratings of automotive transceivers, preventing latch-up or permanent damage. |
Use Scenario: Safeguarding 24 V DC digital inputs on programmable logic controllers exposed to field-wiring surges and relay contact bounce. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input terminals, coordinated with series current-limiting resistor and optocoupler isolation. Use Value: Absorbs up to 1500 W of transient energy without degradation, maintaining long-term reliability in harsh factory environments. |
| Consumer Power Adapter Output Protection | Telecom Ethernet Port Surge Suppression |
Use Scenario: Secondary-side transient suppression on 5 V/9 V/12 V USB-C PD and wall adapter outputs to meet UL 62368-1 surge requirements. IC Role / Device Role / Timing Role: Final-stage TVS connected between output rail and ground, activated only during fault conditions. Use Value: Withstands repetitive 10/1000 µs surges at 0.01% duty cycle, ensuring sustained protection across product lifetime. |
Use Scenario: Board-level protection for RJ45 Ethernet PHY interfaces subjected to lightning-induced common-mode surges per IEC 61000-4-5 Level 4. IC Role / Device Role / Timing Role: Paired unidirectional TVS on each differential pair (TX+/TX−, RX+/RX−), referenced to chassis ground. Use Value: Low VC of 10.5 V prevents PHY IC damage while maintaining signal integrity due to minimal capacitance impact. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.8AHE3/A | Same VBR (6.45–7.14 V), but lower PPPM = 400 W; SMA package (smaller footprint, higher RθJA) | Not AEC-Q101 qualified; suitable for cost-sensitive consumer applications with lower surge severity | Select when board space is constrained and 400 W peak power suffices; verify thermal design with RθJA = 100 °C/W |
| 1.5KE6.8A-E3/54 | Through-hole DO-201 package; identical electrical specs but incompatible mounting and higher inductance | Limited to prototyping or legacy through-hole designs; not suitable for automated SMT production | Choose only for manual assembly or repair scenarios where SMC footprint cannot be accommodated |
Compared with 1.5SMC6.8AHM3/I, SMAJ6.8AHE3/A offers smaller size but reduced surge handling and no automotive qualification, while 1.5KE6.8A-E3/54 retains identical clamping performance but sacrifices SMT manufacturability and thermal efficiency - making 1.5SMC6.8AHM3/I optimal for high-reliability, volume SMT deployments.
Availability
1.5SMC6.8AHM3/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC inputs, consumer power adapters, and telecom Ethernet ports requiring stable component supply, AEC-Q101 assurance, and halogen-free compliance.
Supply support for 1.5SMC6.8AHM3/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 1.5SMC Series was developed to deliver high-power, surface-mount TVS protection for automotive, industrial, and communications systems where space, thermal performance, and AEC-Q101 compliance are critical design constraints.
FAQ
What is the clamping voltage of the 1.5SMC6.8AHM3/I under maximum rated surge current?
The 1.5SMC6.8AHM3/I exhibits a maximum clamping voltage (VC) of 10.5 V when subjected to its peak pulse current (IPPM) of 143 A under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on specified 8.0 mm × 8.0 mm copper pads and ensures downstream components remain within safe operating voltage limits during transient events.
Is the 1.5SMC6.8AHM3/I qualified for automotive applications?
Yes, the 1.5SMC6.8AHM3/I is AEC-Q101 qualified, as confirmed by the "HM3" suffix in its ordering code. This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and accelerated life, validating its suitability for under-hood and cabin-mounted automotive electronics including ADAS sensors and body control modules.
What does the "HM3" suffix indicate for the 1.5SMC6.8AHM3/I?
The "HM3" suffix in 1.5SMC6.8AHM3/I denotes halogen-free, RoHS-compliant construction combined with AEC-Q101 qualification. It distinguishes this variant from commercial-grade "E3" or "M3" versions and confirms compliance with automotive environmental and reliability standards, including JESD201 Class 2 whisker resistance and MSL Level 1 moisture sensitivity.
Can the 1.5SMC6.8AHM3/I be used in bidirectional configurations?
No, the 1.5SMC6.8AHM3/I is strictly a unidirectional TVS diode, as indicated by the "A" (not "CA") in its part number and the cathode band marking. For bidirectional protection, Vishay specifies variants with "CA" suffixes (e.g., 1.5SMC6.8CA), which have symmetrical breakdown characteristics and no polarity marking.
What is the thermal resistance of the 1.5SMC6.8AHM3/I from junction to ambient?
The 1.5SMC6.8AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes still air conditions and is critical for calculating maximum allowable power dissipation at elevated ambient temperatures.
1.5SMC6.8AHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 143A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC6.8AHM3/I FAQ
1.How can I place an order for 1.5SMC6.8AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8AHM3/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 1.5SMC6.8AHM3/I reliable?
The price and inventory of 1.5SMC6.8AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8AHM3/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8AHM3/I?
1.5SMC6.8AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8AHM3/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 1.5SMC6.8AHM3/I?
For technical support, including 1.5SMC6.8AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8AHM3/I requirements.
6.How does Aetrix verify that 1.5SMC6.8AHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8AHM3/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 1.5SMC6.8AHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8AHM3/I?
All 1.5SMC6.8AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8AHM3/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 1.5SMC6.8AHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC6.8AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8AHM3/I Tags
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