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Vishay General Semiconductor - Diodes Division 1.5SMC6.8AHE3_A/I
- Part No.:
- 1.5SMC6.8AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8AHE3_A/I.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,309
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Product details
Overview
1.5SMC6.8AHE3_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 6.8 V breakdown voltage (VBR), 5.8 V stand-off voltage (VWM), 10.5 V clamping voltage (VC) at 143 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC6.8AHE3_A/I datasheet, 1.5SMC6.8AHE3_A/I pinout, 1.5SMC6.8AHE3_A/I application, or 1.5SMC6.8AHE3_A/I equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, SMC (DO-214AB) package compatibility, and verified clamping performance under lightning-surge and inductive-switching transients.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-band polarity marking, leveraging glass-passivated junction technology for stable avalanche response. Its 1500 W peak pulse rating is defined per 10/1000 µs waveform at TA = 25 °C on 8.0 mm × 8.0 mm copper pads, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W.
It delivers fast transient response (<1 ps typical), low incremental surge resistance, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The device is RoHS-compliant and AEC-Q101 qualified, supporting automotive-grade reliability in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA test current - defines precise avalanche initiation threshold for predictable clamping onset |
| VWM | 5.80 V - maximum continuous reverse operating voltage before leakage exceeds 1000 µA |
| VC @ IPPM | 10.5 V at 143 A - clamped voltage during full 1500 W surge, limiting downstream IC stress |
| IPPM | 143 A - peak pulse current handling capacity under standardized 10/1000 µs transient |
| PPPM | 1500 W - peak pulse power dissipation capability, derated above 25 °C per Fig. 2 |
| TJ max. | +150 °C - maximum junction temperature enabling operation in under-hood automotive zones |
| Package | SMC (DO-214AB) - surface-mount outline with 0.305" × 0.220" footprint and matte tin-plated leads |
Pinout & Package
Package: SMC (DO-214AB), molded case meeting UL 94 V-0 flammability rating; terminals are matte tin plated, solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward surge (e.g., ESD event polarity reversal) |
| Cathode | Avalanche clamping terminal | Connected to higher-potential side; initiates controlled breakdown when reverse voltage exceeds VWM, shunting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges without degradation when mounted per recommended pad layout |
| Glass-passivated junction | Ensures stable VBR tolerance (±5%) and long-term reliability under thermal cycling |
| MSL Level 1 rating | Enables standard SMT reflow without moisture sensitivity concerns (peak 260 °C) |
| Low clamping ratio (VC/VBR ≈ 1.5) | Minimizes overvoltage stress on protected MOSFETs or microcontrollers during transient events |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., oxygen, pressure) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp reverse-polarity surges before they reach the transceiver input stage. Use Value: Limits VC to 10.5 V during 143 A surge, preventing latch-up or gate oxide damage in 5 V/3.3 V interface ICs. | Use Scenario: Safeguarding digital input modules in programmable logic controllers against induced surges from relay coil switching and motor drive noise. IC Role / Device Role / Timing Role: Mounted across 24 V DC input terminals to absorb repetitive 10/1000 µs transients up to 1500 W without degradation. Use Value: Maintains system uptime by preventing false triggering or permanent failure of optocoupler input stages during factory floor EMI events. |
| Consumer Power Adapter Protection | Telecom Line Interface Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters for USB-C PD and laptop chargers exposed to lightning-induced surges on DC output rails. IC Role / Device Role / Timing Role: Placed between +VOUT and GND to clamp transient spikes before they reach synchronous rectifier MOSFETs or output capacitor banks. Use Value: Enables compliance with UL 62368-1 surge immunity requirements using a single discrete component with validated 1500 W rating. | Use Scenario: Protection of Ethernet PHY front-end circuits and PoE injectors against induced surges on twisted-pair data lines in enterprise infrastructure equipment. IC Role / Device Role / Timing Role: Used in common-mode configuration across differential pairs to suppress longitudinal surges while preserving signal integrity. Use Value: Achieves <10.5 V clamping at 143 A with <1 ps response, ensuring no bit errors or PHY reset during ANSI/IEEE C62.41 Category B transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A-E3/52T | Lower peak power (600 W), SMB package (smaller footprint), same VBR range and AEC-Q101 qualification | Preferred for space-constrained consumer electronics where 600 W surge margin suffices | Select when board area is critical and full 1500 W rating is not required |
| 1.5KE6.8A | Through-hole DO-201 package, identical electrical specs but no AEC-Q101 qualification or MSL Level 1 rating | Suitable for prototyping or non-automotive industrial use where reflow compatibility is not needed | Choose only for legacy through-hole designs or cost-sensitive non-automotive production |
Compared with SMBJ6.8A-E3/52T and 1.5KE6.8A, the 1.5SMC6.8AHE3_A/I uniquely combines 1500 W surge capacity, AEC-Q101 qualification, and SMC surface-mount compatibility - making it the only option for high-reliability automotive SMT production requiring full IEC 61000-4-5 Level 4 compliance.
Availability
1.5SMC6.8AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC manufacturing, and telecom infrastructure projects requiring stable component supply with guaranteed AEC-Q101 traceability and RoHS compliance.
Supply support for 1.5SMC6.8AHE3_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, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The 1.5SMC Series was engineered specifically for high-power transient suppression in demanding environments - delivering consistent clamping performance, low leakage, and robust surge endurance across automotive, industrial, and telecom applications.
FAQ
What is the clamping voltage of the 1.5SMC6.8AHE3_A/I under maximum surge conditions?
The 1.5SMC6.8AHE3_A/I has a maximum clamping voltage (VC) of 10.5 V at its rated peak pulse current (IPPM) of 143 A, measured with a 10/1000 µs waveform. This value is guaranteed per Vishay's datasheet (Doc. #88303, Rev. 09-Mar-2026) and reflects actual device behavior when mounted on 8.0 mm × 8.0 mm copper pads. The 1.5SMC6.8AHE3_A/I maintains this clamping performance across its operational temperature range.
Is the 1.5SMC6.8AHE3_A/I AEC-Q101 qualified and what does that mean for automotive use?
Yes, the 1.5SMC6.8AHE3_A/I is explicitly AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's 1.5SMC Series datasheet. This qualification validates its reliability for automotive applications including under-hood and cabin electronics, covering stress tests for temperature cycling, humidity, mechanical shock, and surge endurance. The 1.5SMC6.8AHE3_A/I meets these requirements without derating in standard mounting configurations.
What is the difference between the 'HE3' and 'E3' suffixes in the 1.5SMC6.8AHE3_A/I part number?
The 'HE3' suffix in 1.5SMC6.8AHE3_A/I indicates RoHS-compliant construction with AEC-Q101 qualification, whereas 'E3' alone denotes RoHS compliance only (no automotive qualification). The 'H' prefix in HE3 explicitly identifies the AEC-Q101 variant, and the '/I' denotes 3500-unit tape-and-reel packaging on a 13-inch reel. The 1.5SMC6.8AHE3_A/I thus provides both environmental compliance and automotive-grade reliability assurance.
Can the 1.5SMC6.8AHE3_A/I be used in bidirectional protection circuits?
No, the 1.5SMC6.8AHE3_A/I is a unidirectional TVS diode, as indicated by its 'A' suffix and cathode-band polarity marking. Bidirectional variants use the 'CA' suffix (e.g., 1.5SMC6.8CA). Using the 1.5SMC6.8AHE3_A/I in bidirectional applications would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit. Always match polarity to application requirements.
What is the thermal resistance and maximum junction temperature specification for the 1.5SMC6.8AHE3_A/I?
The 1.5SMC6.8AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W, per Vishay's datasheet. Its maximum junction temperature (TJ) is +150 °C, allowing reliable operation in high-temperature automotive and industrial environments. Derating curves in Figure 2 of the 1.5SMC6.8AHE3_A/I datasheet define safe power limits above 25 °C ambient.
1.5SMC6.8AHE3_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):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 143A
- 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)
1.5SMC6.8AHE3_A/I FAQ
1.How can I place an order for 1.5SMC6.8AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8AHE3_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 1.5SMC6.8AHE3_A/I reliable?
The price and inventory of 1.5SMC6.8AHE3_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 1.5SMC6.8AHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8AHE3_A/I?
1.5SMC6.8AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8AHE3_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 1.5SMC6.8AHE3_A/I?
For technical support, including 1.5SMC6.8AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8AHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC6.8AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8AHE3_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 1.5SMC6.8AHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8AHE3_A/I?
All 1.5SMC6.8AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8AHE3_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 1.5SMC6.8AHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC6.8AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8AHE3_A/I Tags
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