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Vishay General Semiconductor - Diodes Division SM15T68CAHM3_A/H
- Part No.:
- SM15T68CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T68CAHM3_A/H.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,683
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Product details
Overview
SM15T68CAHM3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 68 V standoff voltage (VWM = 58.1 V), and clamping voltage of 92.0 V at 16.3 A peak pulse current. It provides robust protection for automotive sensor signal lines, industrial I/O ports, and telecom interface circuits against lightning-induced and switching transients.
For engineers reviewing the SM15T68CAHM3_A/H datasheet, SM15T68CAHM3_A/H pinout, SM15T68CAHM3_A/H application, or SM15T68CAHM3_A/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), clamping performance, and halogen-free RoHS-compliant sourcing details - all critical for automotive-grade ESD/transient design validation.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with breakdown voltage VBR = 64.6–71.4 V (tested at 1 mA), reverse leakage <1.0 μA at VWM, and clamps to ≤92.0 V under 16.3 A (10/1000 μs). Its low-inductance SMC package enables fast response (<1 ns) to transient events while maintaining stable junction temperature up to +150 °C.
Designed for high-reliability environments, SM15T68CAHM3_A/H meets AEC-Q101 stress test requirements and is halogen-free, RoHS-compliant (HM3 suffix), with MSL Level 1 rating and 260 °C lead-free reflow compatibility. It exhibits no polarity marking due to bidirectional symmetry and uses glass-passivated junction technology for long-term stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58.1 V - Maximum continuous reverse operating voltage before significant leakage; ensures compatibility with 48 V automotive and industrial bus systems. |
| VBR min/max | 64.6 V / 71.4 V - Breakdown occurs within this band at 1 mA test current; defines reliable turn-on threshold for transient suppression. |
| VC @ IPPM | 92.0 V at 16.3 A - Clamping voltage during 10/1000 μs surge; limits downstream IC stress to safe levels below 100 V. |
| PPPM | 1500 W - Peak pulse power handling capability; supports protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard 8 mm × 8 mm copper pads; informs board-level thermal design margin. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and industrial ambient conditions. |
| Package | SMC (DO-214AB) - Surface-mount package with 7.75 mm × 6.22 mm footprint and 2.62 mm height; optimized for automated placement and high-power dissipation. |
Pinout & Package
SM15T68CAHM3_A/H is a two-terminal bidirectional TVS diode housed in an SMC (DO-214AB) package. No polarity marking is present, as both terminals are functionally identical for symmetrical transient suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as input/output path for transient energy; no fixed polarity - enables flexible PCB layout without orientation constraints. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line and ground or differential pair. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment interfaces per stress test requirements. |
| Halogen-free & RoHS-compliant (HM3) | Meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability; supports green manufacturing and end-of-life compliance. |
| 1500 W peak pulse power (10/1000 μs) | Withstands high-energy surges from inductive load switching and lightning coupling without degradation or failure. |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage stress on protected ICs - e.g., clamps 68 V system transients to just 92 V, preserving margin for 100 V-rated components. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without moisture-related popcorning or delamination risks. |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers in vehicle body control modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping device placed between signal line and chassis ground to limit transient overvoltage. Use Value: Maintains signal integrity during 100 V/50 ms load dump events by clamping to ≤92 V, preventing transceiver latch-up or permanent damage. |
Use Scenario: Safeguarding PLC analog input channels (0–10 V, 4–20 mA) against field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary transient suppressor mounted at connector entry point to shunt surge energy before reaching precision ADC front-end. Use Value: Limits voltage excursion to <95 V during 1 kV/500 Ω IEC 61000-4-5 surges, preserving measurement accuracy and avoiding input stage saturation. |
| Telecom Interface Protection | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding Ethernet PHY magnetics and PoE controller pins from ESD and lightning-induced surges in outdoor access points. IC Role / Device Role / Timing Role: Secondary-level TVS placed after gas discharge tube (GDT) to refine clamping and handle residual fast-rising transients. Use Value: Responds in <1 ns to sub-microsecond ESD events (IEC 61000-4-2 ±8 kV contact), reducing overshoot beyond primary GDT protection. |
Use Scenario: Protecting USB-C CC and VBUS lines in wall adapters against user-handling ESD and hot-plug transients. IC Role / Device Role / Timing Role: Bidirectional clamp integrated into USB-C receptacle PCB layout to suppress ±15 kV air/±8 kV contact ESD per IEC 61000-4-2. Use Value: Withstands repeated ESD strikes without parameter shift, ensuring long-term reliability in high-volume consumer power products. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ68CA-E3/57T | Same 68 V bidirectional rating but lower 400 W peak power (SMA package); RθJA = 110 °C/W vs. 75 °C/W. | Not suitable for 1500 W surge environments like automotive load dump; limited to low-energy I/O protection. | Select SMAJ68CA-E3/57T only when space-constrained layouts prohibit SMC footprint and surge threat level is ≤400 W. |
| SMCJ68CAHM3_A/H | Same SMC package and HM3 halogen-free/AEC-Q101 spec, but rated for 1500 W at 68 V with tighter VBR tolerance (64.6–71.4 V vs. 68.0–75.2 V). | Functionally interchangeable in most designs; minor VBR variance does not affect clamping performance in typical use cases. | SMCJ68CAHM3_A/H offers identical mechanical and thermal behavior with marginally improved VBR consistency - preferred where tighter parametric control is required. |
Compared with SMAJ68CA-E3/57T, SM15T68CAHM3_A/H delivers 3.75× higher surge power handling and superior thermal performance in the same application space; versus SMCJ68CAHM3_A/H, it shares identical qualification and packaging but differs in VBR distribution - making SM15T68CAHM3_A/H optimal for cost-sensitive AEC-Q101 designs requiring proven 1500 W capability.
Availability
SM15T68CAHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial programmable logic controllers, and telecom infrastructure equipment requiring stable component supply with full traceability and lifecycle management.
Supply support for SM15T68CAHM3_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, power efficiency, and automotive-grade qualification.
The SM15T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and 1500 W surge resilience are mandatory design requirements.
FAQ
What is the peak pulse current rating of SM15T68CAHM3_A/H at 10/1000 μs?
The SM15T68CAHM3_A/H has a peak pulse current (IPPM) rating of 16.3 A when tested with a 10/1000 μs waveform. This value is derived directly from its 1500 W peak pulse power rating and 92.0 V clamping voltage (IPPM = PPPM/VC). It reflects the maximum transient current the device can safely divert without failure under standardized surge conditions.
Is SM15T68CAHM3_A/H suitable for automotive applications?
Yes, SM15T68CAHM3_A/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. Its 1500 W surge rating, -65 °C to +150 °C operating range, and MSL Level 1 reflow compatibility make it appropriate for under-hood and cabin electronics including sensor interfaces and powertrain subsystems.
Does SM15T68CAHM3_A/H have polarity markings on the package?
No, SM15T68CAHM3_A/H does not feature polarity markings because it is a bidirectional TVS diode. Both terminals are functionally identical, allowing installation in either orientation on the PCB - a key advantage for differential signal line protection and simplified assembly.
What is the thermal resistance of SM15T68CAHM3_A/H, and how is it measured?
The SM15T68CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W, measured with the device mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes standard JEDEC test conditions and guides heatsinking decisions for sustained power dissipation scenarios.
How does the clamping voltage of SM15T68CAHM3_A/H compare to its standoff voltage?
The SM15T68CAHM3_A/H has a standoff voltage (VWM) of 58.1 V and clamps to 92.0 V at 16.3 A, yielding a clamping ratio of approximately 1.58. This ratio indicates the overvoltage margin imposed on protected circuitry during surge events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings.
SM15T68CAHM3_A/H 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:
- Active
- 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):
- 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)
SM15T68CAHM3_A/H FAQ
1.How can I place an order for SM15T68CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T68CAHM3_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 SM15T68CAHM3_A/H reliable?
The price and inventory of SM15T68CAHM3_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 SM15T68CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SM15T68CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T68CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T68CAHM3_A/H?
SM15T68CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T68CAHM3_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 SM15T68CAHM3_A/H?
For technical support, including SM15T68CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T68CAHM3_A/H requirements.
6.How does Aetrix verify that SM15T68CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SM15T68CAHM3_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 SM15T68CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SM15T68CAHM3_A/H?
All SM15T68CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T68CAHM3_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 SM15T68CAHM3_A/H part is unused and in its original packaging.
Return procedure for SM15T68CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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