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Vishay General Semiconductor - Diodes Division SM15T68AHE3/57T
- Part No.:
- SM15T68AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T68AHE3/57T.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,031
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Product details
Overview
SM15T68AHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 68 V standoff voltage (VWM = 58.1 V), 92 V clamping voltage at 16.3 A peak pulse current, and 1500 W peak pulse power rating per 10/1000 μs waveform. It protects MOSFETs, ICs, and sensor signal lines in automotive power electronics and industrial motor drive I/O interfaces.
For engineers reviewing the SM15T68AHE3/57T datasheet, SM15T68AHE3/57T pinout, SM15T68AHE3/57T application, or SM15T68AHE3/57T equivalent, key selection criteria include verified clamping performance at IPPM = 16.3 A, AEC-Q101 qualification status, unidirectional polarity with cathode band marking, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SM15T68AHE3/57T operates as a silicon avalanche diode with glass-passivated junction, delivering precise voltage clamping during lightning-induced or inductive-switching transients. Its low-inductance SMC package and thermal resistance RθJL = 15 °C/W support robust energy dissipation without thermal runaway under repetitive surge stress.
Designed for unidirectional DC line protection, it exhibits 1.0 mA test current (IT) for breakdown verification, 1.0 μA max reverse leakage at VWM, and meets J-STD-020 MSL Level 1 with 260 °C reflow peak. Failure mode under overstress is short-circuit, ensuring system-level fault containment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58.1 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 64.6 V / 71.4 V - Breakdown occurs within this range at 1.0 mA IT, defining turn-on threshold tolerance |
| VC @ IPPM | 92.0 V at 16.3 A - Clamped voltage during 10/1000 μs surge, limiting downstream voltage stress |
| PPPM | 1500 W - Peak surge power handling capability, enabling protection against lightning surges per IEC 61000-4-5 |
| TJ max | +150 °C - Maximum junction temperature, supporting operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for high-power density layout |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
SM15T68AHE3/57T uses the standard SMC (DO-214AB) package with two terminals: anode and cathode. The cathode is marked by a visible band on the body. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated IPPM performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected line ground or low-side return | Completes conduction path during reverse transient clamping; must be routed with low-inductance trace |
| Cathode | Current exit point in forward bias; marked by band; connected to protected line voltage rail | Defines polarity for unidirectional operation; incorrect orientation prevents clamping function |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges on 12 V/24 V automotive power rails |
| Glass-passivated junction | Ensures stable VBR over lifetime and humidity exposure, critical for long-term field reliability in industrial sensors |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage margin between clamping and device breakdown, improving protection headroom for 68 V systems |
| MSL Level 1 (260 °C) | Supports lead-free reflow without popcorn cracking or delamination, eliminating pre-bake requirements in high-volume SMT lines |
| AEC-Q101 qualification | Validates suitability for automotive powertrain and body control modules where failure modes must be short-circuit safe |
Applications
| Automotive Power Distribution | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protection of 24 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input rail to clamp positive surges above 58.1 V. Use Value: Limits voltage to ≤92 V during 16.3 A transients, preventing damage to downstream DC-DC converters and microcontrollers. |
Use Scenario: Guarding PLC analog input channels from inductive kickback when solenoids de-energize. IC Role / Device Role / Timing Role: Standoff protector on signal line referenced to local ground, conducting only during >58.1 V excursions. Use Value: Maintains signal integrity below 1 μA leakage at 58.1 V while clamping 10/1000 μs spikes to safe levels for ADC front-end stages. |
| Telecom Power Supply Input | Consumer Appliance Control Board |
Use Scenario: Input-stage surge suppression on 48 V PoE-powered network switches exposed to Ethernet cable surges. IC Role / Device Role / Timing Role: Primary clamping device on DC input bus, coordinated with upstream fuse for fail-safe shutdown. Use Value: Absorbs up to 1500 W for 1 ms, meeting GR-1089-CORE telecom immunity requirements without derating at +85 °C ambient. |
Use Scenario: Protecting microcontroller GPIOs driving relays in smart home HVAC controllers. IC Role / Device Role / Timing Role: Localized TVS on relay coil flyback path, oriented anode-to-ground to shunt negative transients. Use Value: Withstands 200 A IFSM surge, surviving repeated relay switching cycles without degradation in clamping performance. |
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 | 400 W PPPM, SMA package, same VWM/VBR but lower IPPM (9.2 A) | Limited to lower-energy threats; unsuitable for IEC 61000-4-5 Level 4 | Select when space-constrained layouts require smaller footprint and surge threat is <1 kV |
| SMCJ68AHE3/57T | 1500 W PPPM, same SMC package, but VWM = 58.1 V, VC = 113 V at 13.3 A | Higher clamping voltage reduces protection margin for 68 V-rated circuits | Prefer when higher surge current tolerance is needed but clamping voltage margin allows 113 V excursion |
Compared with SMAJ68A-E3/57T and SMCJ68AHE3/57T, the SM15T68AHE3/57T delivers optimal balance of low clamping voltage (92 V), high surge current (16.3 A), and AEC-Q101 qualification-making it the preferred choice for automotive and industrial 24–68 V systems requiring certified reliability and tight voltage margins.
Availability
SM15T68AHE3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive I/O protection, and telecom power supply input applications requiring stable component supply, AEC-Q101 compliance, and 1500 W transient immunity.
Supply support for SM15T68AHE3/57T 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, and protection devices with emphasis on high-reliability, high-power, and automotive-qualified components.
The SM15T Series was developed specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where 1500 W surge handling and AEC-Q101 validation are mandatory design requirements.
FAQ
What is the clamping voltage of SM15T68AHE3/57T at its rated peak pulse current?
The SM15T68AHE3/57T has a maximum clamping voltage (VC) of 92.0 V at 16.3 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value is guaranteed per the Vishay datasheet revision 09-Jan-2024 and defines the upper voltage limit imposed on protected circuitry during surge events. The SM15T68AHE3/57T maintains this clamping performance across its full operating temperature range when mounted on specified 8.0 mm × 8.0 mm copper pads.
Is SM15T68AHE3/57T qualified for automotive applications?
Yes, SM15T68AHE3/57T is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's SM15T Series datasheet (Document Number: 88380). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, validating its use in automotive powertrain, body control, and infotainment systems. The SM15T68AHE3/57T is explicitly designated for automotive-grade reliability in the manufacturer's ordering information table.
What is the standoff voltage (VWM) and breakdown voltage range for SM15T68AHE3/57T?
The SM15T68AHE3/57T has a standoff voltage (VWM) of 58.1 V and a breakdown voltage (VBR) range of 64.6 V to 71.4 V at 1.0 mA test current (IT). These values are measured per standard JEDEC conditions and define the voltage window within which the device remains non-conductive during normal operation yet triggers reliably during overvoltage events. The SM15T68AHE3/57T's VBR tolerance ensures consistent clamping behavior across production lots.
Does SM15T68AHE3/57T have bidirectional capability?
No, SM15T68AHE3/57T is a unidirectional transient voltage suppressor. Its part number ends in "A", not "CA", and the datasheet specifies polarity marking via a cathode band. Bidirectional variants in the SM15T Series use the "CA" suffix (e.g., SM15T68CA). The SM15T68AHE3/57T conducts only during positive transients applied to its cathode, making it suitable for DC rail protection where polarity is fixed.
What package type and mounting requirements apply to SM15T68AHE3/57T?
SM15T68AHE3/57T uses the SMC (DO-214AB) package with dimensions 7.75 mm × 6.22 mm × 2.62 mm. For rated 1500 W pulse power performance, it must be mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, per Figure 2 in the Vishay datasheet. The SM15T68AHE3/57T is RoHS-compliant, halogen-free, and qualified for MSL Level 1 reflow up to 260 °C.
SM15T68AHE3/57T 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 (SMCJ)
SM15T68AHE3/57T FAQ
1.How can I place an order for SM15T68AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T68AHE3/57T 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 SM15T68AHE3/57T reliable?
The price and inventory of SM15T68AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T68AHE3/57T is usually 5 days.
3.What payment methods are accepted for SM15T68AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T68AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T68AHE3/57T?
SM15T68AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T68AHE3/57T 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 SM15T68AHE3/57T?
For technical support, including SM15T68AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T68AHE3/57T requirements.
6.How does Aetrix verify that SM15T68AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T68AHE3/57T 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 SM15T68AHE3/57T meets industry standards.
7.What is the process for return or replacement of SM15T68AHE3/57T?
All SM15T68AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T68AHE3/57T, 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 SM15T68AHE3/57T part is unused and in its original packaging.
Return procedure for SM15T68AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T68AHE3/57T Tags
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