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Vishay General Semiconductor - Diodes Division 1.5SMC68AHE3_A/I
- Part No.:
- 1.5SMC68AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC68AHE3_A/I.pdf
- Description:
- TVS DIODE 58.1VWM 92VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,412
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Product details
Overview
1.5SMC68AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 68 V breakdown voltage (VBR min/max: 64.6–71.4 V), 58.1 V stand-off voltage (VWM), 92.0 V clamping voltage (VC) at 16.3 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC68AHE3_A/I datasheet, 1.5SMC68AHE3_A/I pinout, 1.5SMC68AHE3_A/I application, or 1.5SMC68AHE3_A/I equivalent, key selection criteria include clamping performance under 10/1000 µs surge, AEC-Q101 qualification status, SMC (DO-214AB) package thermal resistance (RθJA = 75 °C/W), and unidirectional polarity marking for cathode identification.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging an avalanche breakdown mechanism to limit transient overvoltages before they reach downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the SMC package supports automated placement and meets MSL Level 1 per J-STD-020.
The device is rated for 1500 W peak pulse power (10/1000 µs), with derating above TA = 25 °C per Fig. 2, and handles up to 200 A non-repetitive forward surge (8.3 ms half-sine). Junction temperature range spans –65 °C to +150 °C, and it complies with UL 497B for protector classification (QVGQ2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V - defines reliable avalanche initiation window; ensures consistent clamping onset across production lots |
| 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 - clamping voltage during 10/1000 µs surge; determines maximum stress imposed on protected IC or MOSFET |
| PPPM | 1500 W - peak pulse power handling capability; enables protection against lightning-induced surges and inductive switching transients |
| IFSM | 200 A - peak forward surge current (8.3 ms half-sine); supports robustness against accidental DC overvoltage or fault conditions |
| TJ max | +150 °C - maximum junction temperature; sets thermal design margin for PCB copper pad layout and ambient operating envelope |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance; informs minimum required copper pad area (0.31" × 0.31") for safe power dissipation |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity marked by cathode band; unidirectional configuration only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse voltage reference node | Connected to lower-potential side of protected line; forms avalanche path when cathode-side voltage exceeds VBR |
| Cathode | Avalanche conduction terminal / clamping output node | Marked with band; ties to higher-potential rail (e.g., VCC, signal high); sinks surge current into ground or return path |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 Level 4 (4 kV surge) when properly laid out with recommended 8.0 mm × 8.0 mm copper pads |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS sensor, and infotainment power rails |
| Glass passivated junction | Provides stable VBR tolerance (±5%), low leakage (<1 µA), and long-term parameter stability under thermal/humidity stress |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without preconditioning; eliminates moisture-related popcorning risk during assembly |
| UL 497B recognized (QVGQ2) | Meets safety requirements for telecom and industrial signal-line protectors - simplifies end-equipment certification |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and jump-start transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between sensor signal line and ground, triggered within <1 ns to clamp spikes exceeding 58.1 V. Use Value: Limits voltage seen by downstream op-amp or ADC input to ≤92.0 V during 10/1000 µs surges, preventing latch-up or gate oxide damage in AEC-Q100-compliant ICs. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Standoff device mounted at connector entry point; conducts only during transients >58.1 V, remaining high-impedance during normal 24 V operation. Use Value: Maintains <1.0 µA leakage at 24 V, avoiding false triggering; clamps 1 kV/0.5 J transients to <92.0 V, preserving optocoupler and microcontroller input integrity. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Output Protection |
Use Scenario: Secondary-side transient suppression on Ethernet PHY power rails (e.g., 3.3 V, 5 V) and RS-485 data lines exposed to EFT and lightning-induced coupling. IC Role / Device Role / Timing Role: Fast-response unidirectional TVS placed between VDD and GND; activated within sub-nanosecond to shunt energy before IC damage occurs. Use Value: Delivers 1500 W pulse handling with 92.0 V clamping, meeting GR-1089-CORE Level 3 telecom surge immunity without requiring series impedance or additional filtering. |
Use Scenario: Output overvoltage protection in AC/DC adapters for USB-C PD and smart home devices, guarding against regulator failure or feedback loop loss. IC Role / Device Role / Timing Role: Last-line defense diode tied between regulated 5 V/9 V/12 V output and ground; clamps fault voltages before reaching connected peripherals. Use Value: Withstands 200 A 8.3 ms surge (e.g., capacitor short), limiting output excursion to ≤92.0 V and enabling safe shutdown of upstream controller before catastrophic failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ68AHE3/A | Same VBR/VC specs but SMB (DO-214AA) package; 600 W PPPM, RθJA = 85 °C/W | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 without parallel staging | Select when board space is constrained and surge threat level is ≤1 kV; verify thermal margin with smaller pad area |
| 1.5KE68A-E3/54 | Through-hole DO-201AE package; same 68 V VBR, 92 V VC, but 1500 W rating requires larger footprint and manual assembly | Not suitable for automated SMT lines; incompatible with high-density layouts or AEC-Q101 automotive qualification | Choose only for legacy through-hole designs or prototyping where reflow compatibility and automotive qualification are not required |
Compared with SMBJ68AHE3/A and 1.5KE68A-E3/54, the 1.5SMC68AHE3_A/I delivers identical clamping performance in a surface-mount AEC-Q101-qualified package with superior power density (1500 W in SMC), enabling compact, automotive-grade surge protection without compromising surge rating or manufacturability.
Availability
1.5SMC68AHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, telecom line cards, and consumer power adapter outputs requiring stable component supply, AEC-Q101 compliance, and 1500 W transient immunity.
Supply support for 1.5SMC68AHE3_A/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in automotive, industrial, and telecom environments - prioritizing AEC-Q101 qualification, low clamping voltage, and robust surge handling in the SMC package.
FAQ
What is the clamping voltage of the 1.5SMC68AHE3_A/I and how is it measured?
The 1.5SMC68AHE3_A/I has a maximum clamping voltage (VC) of 92.0 V at 16.3 A peak pulse current, tested with a 10/1000 µs waveform per Fig. 1 in the Vishay datasheet. This value represents the upper limit of voltage imposed on protected circuitry during a standardized surge event and is measured across the anode-cathode terminals under controlled lab conditions using calibrated pulse generators.
Is the 1.5SMC68AHE3_A/I AEC-Q101 qualified and what does that cover?
Yes, the 1.5SMC68AHE3_A/I is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's 1.5SMC Series datasheet (Doc. #88303). This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), accelerated life testing, and ESD (HBM ≥8 kV), validating suitability for automotive powertrain, chassis, and body electronics applications.
How does the 1.5SMC68AHE3_A/I differ from bidirectional TVS diodes like 1.5SMC68CAHE3_A/I?
The 1.5SMC68AHE3_A/I is unidirectional and features a cathode band for polarity identification, allowing it to conduct only in reverse avalanche mode - ideal for DC power rail protection. In contrast, 1.5SMC68CAHE3_A/I is bidirectional with no polarity marking and symmetrical clamping in both directions, suited for AC lines or differential signal pairs like RS-485 where voltage reversals occur.
What is the thermal resistance and recommended PCB layout for the 1.5SMC68AHE3_A/I?
The 1.5SMC68AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet. To maintain safe operation under repetitive surges, use minimum pad dimensions matching this layout and avoid thermal isolation - internal copper planes should connect directly to the pads.
Does the 1.5SMC68AHE3_A/I meet UL safety standards and for which applications?
Yes, the 1.5SMC68AHE3_A/I is UL 497B recognized (file E136766, QVGQ2 classification) for protector applications in telecommunications and industrial equipment. It is approved for use on primary and secondary circuits where transient suppression is required for safety compliance - including Ethernet ports, analog sensor inputs, and DC power distribution networks.
1.5SMC68AHE3_A/I 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:
- Active
- 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_A/I FAQ
1.How can I place an order for 1.5SMC68AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC68AHE3_A/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 1.5SMC68AHE3_A/I reliable?
The price and inventory of 1.5SMC68AHE3_A/I 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_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC68AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC68AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC68AHE3_A/I?
1.5SMC68AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC68AHE3_A/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 1.5SMC68AHE3_A/I?
For technical support, including 1.5SMC68AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC68AHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC68AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC68AHE3_A/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 1.5SMC68AHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC68AHE3_A/I?
All 1.5SMC68AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC68AHE3_A/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 1.5SMC68AHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC68AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC68AHE3_A/I Tags
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