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Vishay General Semiconductor - Diodes Division 1.5SMC6.8CAHE3/9AT
- Part No.:
- 1.5SMC6.8CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8CAHE3/9AT.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,774
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Product details
Overview
1.5SMC6.8CAHE3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. It features 6.8 V breakdown voltage (VBR), 5.8 V stand-off voltage (VWM), 1500 W peak pulse power (10/1000 µs), <10.5 V clamping voltage at 143 A peak pulse current, and AEC-Q101 qualification for automotive use.
For engineers reviewing the 1.5SMC6.8CAHE3/9AT datasheet, 1.5SMC6.8CAHE3/9AT pinout, 1.5SMC6.8CAHE3/9AT application, or 1.5SMC6.8CAHE3/9AT equivalent, this device serves as a robust, RoHS-compliant, bidirectional protection solution for sensitive electronics exposed to lightning surges, inductive switching transients, and ESD events in automotive, industrial, and telecom systems.
Technical Context
The 1.5SMC6.8CAHE3/9AT operates as a bidirectional avalanche diode with symmetrical clamping behavior in both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1000 µA at VWM), while its low incremental surge resistance supports fast, predictable clamping under high-current transients.
Designed for surface-mount assembly on standard PCB copper pads (8.0 mm × 8.0 mm per terminal), it delivers 1500 W peak pulse power handling with 0.01% duty cycle and meets MSL Level 1 per J-STD-020 (260 °C reflow peak). Junction temperature range spans −65 °C to +150 °C, supporting operation in harsh thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V - Ensures reliable avalanche conduction onset within tight tolerance at 10 mA test current |
| VWM | 5.8 V - Maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 10.5 V at 143 A - Clamped voltage during 1500 W transient, limiting downstream stress |
| IPPM | 143 A - Peak pulse current capability with 10/1000 µs waveform, defining surge survivability |
| PPPM | 1500 W - Peak pulse power rating, specifying transient energy absorption capacity |
| TJ max. | +150 °C - Maximum junction temperature, enabling use in under-hood automotive or industrial enclosures |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads; dimensions 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); UL 94 V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Input/Line side for bidirectional clamping | One end of symmetrical PN junction; connects to protected line (e.g., CAN_H or RS-485 A) |
| Cathode (Terminal 2) | Input/Line side for bidirectional clamping | Other end of symmetrical PN junction; connects to same protected line (e.g., CAN_L or RS-485 B); no polarity marking on bidirectional devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), or ungrounded power rails without polarity concerns |
| 1500 W peak pulse power | Withstands high-energy transients such as ISO 7637-2 Pulse 5a (load dump) or IEC 61000-4-5 Combination Wave (10/700 µs) |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes overvoltage exposure to downstream ICs during surge events, improving system-level robustness |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without dry-pack or baking, reducing manufacturing complexity and cost |
Applications
| Automotive CAN Bus Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L lines in vehicle ECUs against load dump, jump-start spikes, and ESD. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt transients before reaching CAN transceiver. Use Value: Maintains CAN signal integrity by limiting line voltage to ≤10.5 V during 143 A surges, preventing transceiver latch-up or damage. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs from induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Differential-line TVS across A/B terminals to suppress common-mode and differential-mode transients simultaneously. Use Value: Enables compliance with IEC 61000-4-5 Level 4 (4 kV) immunity testing using a single discrete component per bus pair. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Adding secondary-level ESD protection to USB 2.0 D+/D− lines in set-top boxes or smart displays. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed after primary ESD array to handle higher-energy events. Use Value: Survives ±15 kV contact discharge (IEC 61000-4-2) without degradation, preserving signal rise time due to minimal parasitic capacitance. |
Use Scenario: Front-end surge protection for ADSL/VDSL line interface circuits exposed to outdoor telephone line transients. IC Role / Device Role / Timing Role: Primary overvoltage protector on tip/ring lines before transformer coupling and line driver ICs. Use Value: Absorbs up to 1500 W of induced lightning energy (10/1000 µs), preventing transformer saturation and downstream IC failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8CA | Lower peak pulse power (600 W), SMB package (smaller footprint, higher thermal resistance) | Suitable for lower-energy transients (e.g., IEC 61000-4-2 ESD only), not recommended for IEC 61000-4-5 surge | Select when board space is constrained and surge threat level is limited to ESD or low-energy switching noise. |
| 1.5KE6.8CA | Through-hole DO-201 package, identical electrical specs but incompatible with SMT assembly | Requires wave soldering or hand-soldering; unsuitable for automated high-volume production | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ6.8CA and 1.5KE6.8CA, the 1.5SMC6.8CAHE3/9AT uniquely combines 1500 W surge capability, SMC surface-mount compatibility, and AEC-Q101 qualification-making it the optimal choice for automotive and industrial SMT-based systems requiring robust, production-ready transient protection.
Availability
1.5SMC6.8CAHE3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial communication interfaces, consumer USB ports, and telecom line cards requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC6.8CAHE3/9AT 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 1.5SMC Series was developed to deliver high-power, surface-mount transient suppression for automotive, industrial, and telecom systems where space, thermal performance, and AEC-Q101 compliance are critical design requirements.
FAQ
What is the breakdown voltage tolerance for the 1.5SMC6.8CAHE3/9AT?
The 1.5SMC6.8CAHE3/9AT has a specified breakdown voltage (VBR) range of 6.45 V to 7.14 V at 10 mA test current, representing a ±5% tolerance around the nominal 6.8 V rating. This tight tolerance ensures consistent clamping onset across production lots and supports precise circuit protection design without over-margining.
Is the 1.5SMC6.8CAHE3/9AT suitable for automotive applications?
Yes, the 1.5SMC6.8CAHE3/9AT is AEC-Q101 qualified and carries the "HE3" suffix denoting RoHS-compliant, automotive-grade construction. It is explicitly validated for under-hood and cabin applications including CAN bus protection, sensor interfaces, and infotainment power rails where reliability under thermal cycling and vibration is mandatory.
What does the "CA" suffix indicate in 1.5SMC6.8CAHE3/9AT?
The "CA" suffix denotes a bidirectional configuration: the 1.5SMC6.8CAHE3/9AT contains two back-to-back avalanche diodes in a single SMC package, enabling symmetrical clamping for AC signals or differential lines. Unlike unidirectional "A" variants, it has no cathode band marking and conducts identically in both directions above VBR.
What is the maximum clamping voltage of the 1.5SMC6.8CAHE3/9AT under surge conditions?
The 1.5SMC6.8CAHE3/9AT clamps to a maximum of 10.5 V when subjected to its rated 143 A peak pulse current (10/1000 µs waveform). This low VC value ensures downstream components-such as CAN transceivers or RS-485 drivers-remain within absolute maximum ratings during high-energy transients.
Does the 1.5SMC6.8CAHE3/9AT require special PCB layout considerations?
Yes. To achieve rated 1500 W pulse power, the 1.5SMC6.8CAHE3/9AT must be mounted on minimum 8.0 mm × 8.0 mm copper pads per terminal, as defined in Vishay's datasheet Figure 2. Smaller pads reduce thermal dissipation and derate peak power, potentially leading to premature failure during repetitive surges.
1.5SMC6.8CAHE3/9AT 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:
- -
- Bidirectional Channels:
- 1
- 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)
1.5SMC6.8CAHE3/9AT FAQ
1.How can I place an order for 1.5SMC6.8CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8CAHE3/9AT 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 1.5SMC6.8CAHE3/9AT reliable?
The price and inventory of 1.5SMC6.8CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8CAHE3/9AT?
1.5SMC6.8CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8CAHE3/9AT 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 1.5SMC6.8CAHE3/9AT?
For technical support, including 1.5SMC6.8CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8CAHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC6.8CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8CAHE3/9AT 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 1.5SMC6.8CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8CAHE3/9AT?
All 1.5SMC6.8CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8CAHE3/9AT, 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 1.5SMC6.8CAHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC6.8CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8CAHE3/9AT Tags
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