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Vishay General Semiconductor - Diodes Division 1.5SMC68AHE3/9AT
- Part No.:
- 1.5SMC68AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC68AHE3/9AT.pdf
- Description:
- TVS DIODE 58.1VWM 92VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,474
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Product details
Overview
1.5SMC68AHE3/9AT 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 68 V breakdown voltage (VBR = 64.6–71.4 V at 1 mA), 58.1 V stand-off voltage (VWM), 92.0 V maximum clamping voltage (VC) at 16.3 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and DC power rail surge suppression.
For engineers reviewing the 1.5SMC68AHE3/9AT datasheet, 1.5SMC68AHE3/9AT pinout, 1.5SMC68AHE3/9AT application, or 1.5SMC68AHE3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, SMC (DO-214AB) package compatibility, thermal resistance (RθJA = 75 °C/W), and compliance with UL 497B for telecom and industrial protectors.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below VWM (58.1 V) and rapidly transitions to low-impedance conduction above VBR (64.6–71.4 V), limiting transient voltages to ≤92.0 V at 16.3 A. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns).
Designed for automated SMT assembly, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C), supports 200 A non-repetitive forward surge (8.3 ms half-sine), and delivers 6.5 W steady-state power dissipation on infinite heatsink at 50 °C ambient - enabling reliable operation in harsh environments including automotive under-hood and industrial control cabinets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at 1 mA - defines precise voltage threshold where clamping begins; critical for matching system overvoltage tolerance margins |
| VWM | 58.1 V - maximum continuous reverse operating voltage; must exceed normal circuit operating voltage to prevent leakage-induced power loss |
| VC @ IPPM | 92.0 V at 16.3 A - clamped voltage during 10/1000 µs surge; determines protected IC's maximum stress level |
| PPPM | 1500 W - peak transient power handling capacity; enables protection against lightning-induced surges per IEC 61000-4-5 Level 4 |
| IFSM | 200 A - single half-sine surge rating (8.3 ms); supports protection of MOSFETs and bridge rectifiers against inductive kickback |
| TJ max | +150 °C - maximum junction temperature; allows operation in under-hood automotive or enclosed industrial enclosures without derating |
| RθJA | 75 °C/W - thermal resistance junction-to-ambient; informs PCB copper pad design (0.31" × 0.31") for thermal reliability |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during positive transients |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 48 V supply rail); conducts surge current to ground when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces per stress test requirements |
| 1500 W peak pulse power | Withstands 10/1000 µs surges up to 16.3 A - sufficient for ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Combination Wave (4 kV) |
| UL 497B recognized (QVGQ2) | Approved for telecom and industrial signal line protection; eliminates need for additional safety certification in end equipment |
| MSL Level 1 moisture sensitivity | Enables standard reflow without baking; compatible with high-volume SMT lines using 260 °C peak profile |
| Glass-passivated junction | Ensures stable VBR and <1 µA leakage at VWM across -65 °C to +150 °C; prevents parameter drift in humid environments |
Applications
| Automotive Sensor Protection | Industrial DC Power Rail |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between signal line and chassis ground, responding within <1 ns to limit voltage to <92 V. Use Value: Prevents latch-up or permanent damage to 5 V/12 V interface ICs during 12 V battery load dump (ISO 7637-2 Pulse 5a, 100 V/100 ms). |
Use Scenario: Safeguarding 48 V auxiliary power supplies in PLCs and motor drives against inductive switching transients from solenoids and contactors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input rail, conducting surge energy to ground before upstream regulators or FETs fail. Use Value: Maintains system uptime by absorbing 1500 W surges without degradation, meeting IEC 61000-4-4 Level 4 (4 kV EFT) immunity requirements. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHYs and PoE injectors from lightning-induced surges on outdoor cabling per UL 497B Class B. IC Role / Device Role / Timing Role: First-stage protector on RJ45 line side, coordinated with GDTs and secondary TVS for staged clamping. Use Value: UL 497B recognition enables direct use in certified telecom infrastructure without redesign or additional testing. |
Use Scenario: Suppressing AC-DC converter input transients caused by mains switching and nearby lightning strikes in wall adapters. IC Role / Device Role / Timing Role: Secondary surge suppressor after MOV, providing precise low-clamp protection for bridge rectifier and primary-side controller. Use Value: 92.0 V clamping voltage ensures downstream components see <100 V stress, extending capacitor and MOSFET lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ68A-E3/52T | Lower PPPM (600 W), same VBR range, SMB (DO-214AA) package (smaller footprint, higher RθJA) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load dump | Select when board space is constrained and surge energy is ≤600 W; verify thermal performance with reduced copper area |
| 1.5KE68A | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 or UL 497B recognition | Not approved for automotive or telecom safety-critical designs; requires additional system-level certification | Choose only for cost-sensitive, non-safety-certified industrial prototypes where SMT is not required |
Compared with SMBJ68A-E3/52T and 1.5KE68A, the 1.5SMC68AHE3/9AT uniquely combines AEC-Q101 qualification, UL 497B listing, 1500 W surge rating, and SMC package - making it the only option qualified for production automotive and certified telecom applications requiring zero layout change from reference designs.
Availability
1.5SMC68AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC I/O modules, telecom line interface circuits, and consumer power adapter designs requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC68AHE3/9AT 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for high-power, surface-mount transient suppression in space-constrained, high-reliability systems - emphasizing AEC-Q101 compliance, UL safety recognition, and consistent clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of the 1.5SMC68AHE3/9AT under a 10/1000 µs surge?
The 1.5SMC68AHE3/9AT clamps to a maximum of 92.0 V at 16.3 A peak pulse current under a 10/1000 µs waveform. This value is measured per Fig. 1 and Table 1 in the Vishay datasheet 88303 and represents the upper limit of voltage seen by downstream circuitry during standardized surge events - critical for ensuring protected ICs remain within absolute maximum ratings.
Is the 1.5SMC68AHE3/9AT qualified for automotive applications?
Yes, the 1.5SMC68AHE3/9AT is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's 1.5SMC Series datasheet (Rev. 09-Mar-2026). This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD - validating its suitability for under-hood and body-control module applications where reliability is mission-critical.
What does the "HE3/9AT" suffix indicate in 1.5SMC68AHE3/9AT?
The "HE3" denotes RoHS-compliant construction with AEC-Q101 qualification, while "9AT" specifies packaging in a 13-inch diameter plastic tape-and-reel format containing 3500 units. This configuration supports high-volume SMT placement and aligns with Vishay's ordering code structure defined in Section 3 of datasheet 88303.
Can the 1.5SMC68AHE3/9AT be used in bidirectional configurations?
No, the 1.5SMC68AHE3/9AT is strictly unidirectional, as indicated by its "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., 1.5SMC68CA). Using this part in reverse-biased configurations will result in forward conduction and failure - correct polarity alignment is mandatory during PCB layout.
What is the maximum operating temperature for the 1.5SMC68AHE3/9AT?
The 1.5SMC68AHE3/9AT has a specified operating junction and storage temperature range of -65 °C to +150 °C. Its thermal resistance (RθJA = 75 °C/W) and 6.5 W power dissipation rating at 50 °C ambient allow sustained operation at full derated power up to +105 °C ambient when mounted on recommended 0.31" × 0.31" copper pads.
1.5SMC68AHE3/9AT 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):
- 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)
1.5SMC68AHE3/9AT FAQ
1.How can I place an order for 1.5SMC68AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC68AHE3/9AT 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 1.5SMC68AHE3/9AT reliable?
The price and inventory of 1.5SMC68AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC68AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC68AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC68AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC68AHE3/9AT?
1.5SMC68AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC68AHE3/9AT 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 1.5SMC68AHE3/9AT?
For technical support, including 1.5SMC68AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC68AHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC68AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC68AHE3/9AT 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 1.5SMC68AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC68AHE3/9AT?
All 1.5SMC68AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC68AHE3/9AT, 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 1.5SMC68AHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC68AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC68AHE3/9AT Tags
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