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Vishay General Semiconductor - Diodes Division SM15T68AHE3/9AT
- Part No.:
- SM15T68AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T68AHE3/9AT.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,238
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Product details
Overview
SM15T68AHE3/9AT 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 1 mA), 58.1 V stand-off voltage (VWM), and 92.0 V clamping voltage (VC) at 16.3 A peak pulse current. It protects automotive sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T68AHE3/9AT datasheet, SM15T68AHE3/9AT pinout, SM15T68AHE3/9AT application, or SM15T68AHE3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1500 W surge capability, low clamping ratio (VC/VBR ≈ 1.32), and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry, conducting only when reverse voltage exceeds VBR (64.6–71.4 V). Its failure mode under overstress is short-circuit, ensuring downstream protection integrity. Thermal resistance is RθJA = 75 °C/W and RθJL = 15 °C/W, supporting operation up to TJ = 150 °C.
Designed for high-energy transient suppression, it meets MSL Level 1 per J-STD-020 with 260 °C peak reflow, uses glass-passivated junction technology, and features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at 1 mA - defines precise conduction onset threshold for reliable overvoltage triggering |
| VWM | 58.1 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | 92.0 V at 16.3 A (10/1000 μs) - clamping voltage limiting protected circuit stress during surge |
| PPPM | 1500 W - peak pulse power handling for lightning and inductive switching threats |
| TJ max. | +150 °C - enables use in under-hood automotive environments without derating |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint |
| AEC-Q101 | Qualified - certified for automotive-grade reliability per stress test requirements |
Pinout & Package
SM15T68AHE3/9AT is housed in an SMC (DO-214AB) plastic package with two terminals: cathode (marked by band) and anode. The device is unidirectional; polarity must be observed during PCB layout to ensure correct clamping direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VAK > VBR |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V automotive buses |
| Glass-passivated chip junction | Ensures stable VBR and low leakage (<1 μA at VWM) across temperature and lifetime |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control, ADAS sensors, and body electronics |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes voltage overshoot during clamping, reducing stress on downstream ICs like CAN transceivers |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor output and ECU input to shunt transients before reaching precision ADC front-end. Use Value: Maintains signal integrity with <1 μA leakage at 58.1 V, enabling accurate 12-bit sensor readings even under harsh electrical conditions. | Use Scenario: Safeguarding digital I/O lines of PLC modules connected to solenoid valves and contactors subject to inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on 24 V DC control lines to limit voltage spikes to ≤92.0 V during coil de-energization. Use Value: Prevents latch-up or permanent damage to microcontroller GPIOs rated for 30 V absolute maximum, extending field reliability. |
| Telecom Power Interface | Consumer Appliance Control Board |
Use Scenario: Shielding PoE-powered Ethernet switch ports from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V DC input rail upstream of DC/DC converter to absorb common-mode transients before regulation. Use Value: Withstands 1500 W pulses without degradation, meeting GR-1089-CORE telecom immunity requirements for central office equipment. | Use Scenario: Securing microcontroller reset and communication lines in smart washing machine mainboards subjected to relay switching noise. IC Role / Device Role / Timing Role: Localized clamping element on UART and reset lines tied to 3.3 V/5 V rails to suppress fast-rising EFT bursts. Use Value: Low 15 °C/W junction-to-lead thermal resistance ensures rapid heat dissipation during repetitive 5 kHz EFT events, avoiding thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ68A-E3/57T | Lower peak pulse power (400 W), same VBR range, SMA package (smaller footprint, higher RθJA) | Suitable for lower-energy threats (IEC 61000-4-4 EFT only); not recommended for lightning-survivable designs | Select SMAJ68A-E3/57T only if board space is constrained and surge threat level is limited to sub-1 kV. |
| 1.5KE68A | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 qualification or MSL-1 rating | Applicable in industrial non-automotive systems where reflow compatibility and automotive qualification are not required | Choose 1.5KE68A for legacy through-hole designs or cost-sensitive non-automotive applications lacking SMT assembly capability. |
Compared with SMAJ68A-E3/57T and 1.5KE68A, SM15T68AHE3/9AT delivers superior surge robustness (1500 W vs. 400 W/1500 W), automotive qualification, and SMT process compatibility-making it the preferred choice for new automotive and high-reliability industrial designs requiring AEC-Q101 compliance and 13″ tape-and-reel logistics.
Availability
SM15T68AHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial motor drive I/O protection, and telecom power interface circuits requiring stable component supply, AEC-Q101 qualification, and 13″ tape-and-reel packaging for high-volume SMT production.
Supply support for SM15T68AHE3/9AT 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 SM15T Series is engineered for high-energy transient suppression in automotive, industrial, and telecom systems-designed to replace older 1.5 kW TVS families with enhanced thermal performance, AEC-Q101 qualification, and optimized SMC packaging for automated manufacturing.
FAQ
What is the breakdown voltage tolerance for SM15T68AHE3/9AT?
The SM15T68AHE3/9AT has a specified breakdown voltage (VBR) range of 64.6 V to 71.4 V at 1 mA test current, representing ±5% tolerance around the nominal 68 V rating. This tight tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage margin design in safety-critical automotive applications.
Is SM15T68AHE3/9AT suitable for bidirectional transient protection?
No, SM15T68AHE3/9AT is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the SM15T68CA variant (with "CA" suffix), which provides symmetrical clamping in both polarities and no polarity marking. Using SM15T68AHE3/9AT in bidirectional configurations may result in forward conduction and failure.
What does the "HE3/9AT" suffix indicate in SM15T68AHE3/9AT?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification, while "9AT" specifies packaging in 13″ diameter plastic tape and reel with 3500 units per reel. This configuration ensures automotive-grade reliability and supports high-speed pick-and-place assembly in volume production environments.
How does SM15T68AHE3/9AT perform under repeated surge stress?
SM15T68AHE3/9AT is characterized for non-repetitive surges per Fig. 3 in the datasheet. While it withstands single 1500 W pulses, repeated application requires derating per Fig. 2-e.g., at TA = 85 °C, peak pulse power drops to ~900 W. For repetitive threats, system-level thermal design and surge frequency limits must be validated using the published RθJA = 75 °C/W and pulse waveform data.
Can SM15T68AHE3/9AT be used in place of older P6KE68A devices?
SM15T68AHE3/9AT offers higher peak pulse power (1500 W vs. 600 W), smaller SMC package vs. DO-15, and AEC-Q101 qualification-making it a functional upgrade. However, due to different package dimensions and thermal characteristics, PCB layout revision is required. It is not a drop-in replacement; pad geometry, copper area (8.0 mm × 8.0 mm per terminal), and thermal relief must be updated per the SMC outline drawing.
SM15T68AHE3/9AT 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)
SM15T68AHE3/9AT FAQ
1.How can I place an order for SM15T68AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T68AHE3/9AT 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 SM15T68AHE3/9AT reliable?
The price and inventory of SM15T68AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T68AHE3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T68AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T68AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T68AHE3/9AT?
SM15T68AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T68AHE3/9AT 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 SM15T68AHE3/9AT?
For technical support, including SM15T68AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T68AHE3/9AT requirements.
6.How does Aetrix verify that SM15T68AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T68AHE3/9AT 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 SM15T68AHE3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T68AHE3/9AT?
All SM15T68AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T68AHE3/9AT, 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 SM15T68AHE3/9AT part is unused and in its original packaging.
Return procedure for SM15T68AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T68AHE3/9AT Tags
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