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Vishay General Semiconductor - Diodes Division SM15T68AHM3/I
- Part No.:
- SM15T68AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T68AHM3/I.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,686
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Product details
Overview
SM15T68AHM3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 68 V breakdown voltage (VBR = 64.6–71.4 V at IT = 1.0 mA), and 92.0 V maximum clamping voltage (VC) at IPPM = 16.3 A. It protects automotive sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T68AHM3/I datasheet, SM15T68AHM3/I pinout, SM15T68AHM3/I application, or SM15T68AHM3/I equivalent, key selection criteria include clamping performance under 16.3 A surge, AEC-Q101 qualification status, halogen-free RoHS compliance, and SMC package thermal resistance (RθJL = 15 °C/W).
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, designed to shunt transient energy above 68 V while maintaining low leakage (<1.0 μA at VWM = 58.1 V). Its glass-passivated junction ensures stable breakdown and low inductance for fast response to sub-microsecond threats.
The device is rated for TJ = −65 °C to +150 °C operation, meets MSL Level 1 (260 °C reflow), and features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Its failure mode under overstress is a short circuit, enabling predictable system-level fault containment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at IT = 1.0 mA - defines precise voltage threshold where clamping begins |
| VWM | 58.1 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 92.0 V at 16.3 A (10/1000 μs) - actual clamped voltage seen by protected IC during worst-case surge |
| PPPM | 1500 W - peak transient power handling capability under standardized lightning-surge waveform |
| RθJL | 15 °C/W - thermal resistance from junction to lead, critical for PCB pad layout and sustained power dissipation |
| TJ max. | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; cathode indicated by band on body; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected line ground or low-side reference | Must be routed to lowest-impedance return path to minimize clamping overshoot during surge |
| Cathode | Current exit terminal in forward bias; marked by band; reverse-biased during normal operation | Connected to protected signal line or power rail; determines polarity of transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per stress test requirements |
| Halogen-free & RoHS-compliant | Meets JEDEC J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker resistance for long-term solder joint integrity |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 surges without degradation when properly mounted |
| Low clamping ratio (VC/VBR ≈ 1.36) | Minimizes overvoltage stress on downstream 75 V-rated components such as automotive CAN transceivers or ADC inputs |
| Low inductance design | Reduces voltage overshoot during fast-rising transients (e.g., <10 ns rise time) due to minimized parasitic L in package and bond wires |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine control modules exposed to load-dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional voltage clamp placed between sensor output and microcontroller input pin. Use Value: Limits transient voltage to ≤92.0 V, preventing latch-up or gate oxide damage in 5 V or 3.3 V interface ICs while meeting AEC-Q100 stress requirements. |
Use Scenario: Guarding PLC analog input channels connected to 4–20 mA current loops near AC contactors and solenoids. IC Role / Device Role / Timing Role: Primary overvoltage protection at field-side connector interface, upstream of signal conditioning amplifier. Use Value: Absorbs 1500 W surges from coil de-energization without degradation, maintaining <1.0 μA leakage at 58.1 V to preserve measurement accuracy. |
| Telecom Power Line Surge Suppression | Computer Peripheral USB Port Protection |
Use Scenario: Secondary protection on -48 V DC telecom power feeds entering base station equipment cabinets. IC Role / Device Role / Timing Role: Standoff-clamp stage following gas discharge tube (GDT) primary protection. Use Value: Clamps residual transients to 92.0 V within nanoseconds, ensuring downstream DC-DC converters survive IEC 61000-4-5 4 kV surges. |
Use Scenario: Reverse-polarity and ESD protection on USB VBUS line in docking stations with external power adapters. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and chassis ground to suppress adapter turn-on spikes and hot-plug transients. Use Value: Withstands 200 A IFSM (10 ms half-sine) from adapter inrush while maintaining 58.1 V standoff to avoid false overvoltage shutdown. |
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-E3/57T | Same SMC package but lower PPPM = 400 W; VBR = 75.6–83.6 V; VC = 115 V at 3.5 A | Limited to lower-energy threats (e.g., IEC 61000-4-2 ESD only); not suitable for lightning or motor-switching surges | Select when cost sensitivity outweighs surge robustness and system-level threat level is classified ≤ Level 3 |
| 1.5KE68A | Through-hole DO-201 package; PPPM = 1500 W; VBR = 64.6–71.4 V; VC = 118 V at 12.7 A; no AEC-Q101 qualification | Requires manual assembly or wave soldering; higher thermal resistance limits sustained surge duty cycle | Choose only for legacy through-hole designs where SMC rework is impractical and automotive qualification is not required |
Compared with SMAJ68A-E3/57T and 1.5KE68A, SM15T68AHM3/I delivers superior clamping (92.0 V vs. ≥115 V), AEC-Q101 validation for automotive use, and halogen-free compliance-making it the preferred choice for new SMT-based designs facing high-energy transients.
Availability
SM15T68AHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power distribution units, and computer peripheral power ports requiring stable component supply across extended production lifecycles.
Supply support for SM15T68AHM3/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, power efficiency, and automotive-grade qualification.
The SM15T Series is engineered specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and 1500 W surge immunity are mandatory design requirements.
FAQ
What is the clamping voltage of SM15T68AHM3/I at its rated peak pulse current?
The SM15T68AHM3/I has a maximum clamping voltage (VC) of 92.0 V when subjected to its rated peak pulse current of 16.3 A under the standard 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per terminal, and represents the upper limit of voltage imposed on protected circuitry during surge events.
Is SM15T68AHM3/I qualified for automotive applications?
Yes, SM15T68AHM3/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's SM15T Series datasheet (Doc. #88380, Rev. 09-Jan-2024). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making SM15T68AHM3/I suitable for under-hood and body-control module deployments.
What does the "HM3" suffix indicate in SM15T68AHM3/I?
The "HM3" suffix in SM15T68AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade E3/M3 versions and confirms compliance with JESD 201 Class 2 whisker resistance and MSL Level 1 reflow profile (peak 260 °C).
How does SM15T68AHM3/I differ from bidirectional TVS diodes like SM15T68CA?
SM15T68AHM3/I is unidirectional and features a cathode band for polarity identification, enabling protection only against positive transients relative to ground. In contrast, SM15T68CA is bidirectional with symmetric clamping in both directions and no polarity marking-making it suitable for AC-coupled or differential signal lines where voltage reversal occurs.
What is the maximum reverse leakage current of SM15T68AHM3/I at its stand-off voltage?
The SM15T68AHM3/I exhibits a maximum reverse leakage current (ID) of 1.0 μA at its rated stand-off voltage (VWM) of 58.1 V, measured at TA = 25 °C. This low leakage ensures minimal power loss and signal distortion in always-on sensor or communication circuits powered from low-current sources.
SM15T68AHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 16.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
SM15T68AHM3/I FAQ
1.How can I place an order for SM15T68AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T68AHM3/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 SM15T68AHM3/I reliable?
The price and inventory of SM15T68AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T68AHM3/I is usually 5 days.
3.What payment methods are accepted for SM15T68AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T68AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T68AHM3/I?
SM15T68AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T68AHM3/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 SM15T68AHM3/I?
For technical support, including SM15T68AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T68AHM3/I requirements.
6.How does Aetrix verify that SM15T68AHM3/I is sourced from the original manufacturer or authorized distributors?
All SM15T68AHM3/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 SM15T68AHM3/I meets industry standards.
7.What is the process for return or replacement of SM15T68AHM3/I?
All SM15T68AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T68AHM3/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 SM15T68AHM3/I part is unused and in its original packaging.
Return procedure for SM15T68AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T68AHM3/I Tags
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