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Vishay General Semiconductor - Diodes Division 1.5SMC6.8CAHE3/57T
- Part No.:
- 1.5SMC6.8CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8CAHE3/57T.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,354
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Product details
Overview
1.5SMC6.8CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust ESD and surge protection in power and signal lines. It features a 6.8 V breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), 10.5 V clamping voltage at rated current, and SMC (DO-214AB) surface-mount package - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC6.8CAHE3/57T datasheet, 1.5SMC6.8CAHE3/57T pinout, 1.5SMC6.8CAHE3/57T application, or 1.5SMC6.8CAHE3/57T equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VBR ≈ 1.54), MSL Level 1 moisture sensitivity, and compatibility with automated SMT assembly on 8 mm × 8 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance during positive and negative transients. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1000 µA at 5.8 V), while the low incremental surge resistance enables rapid energy diversion without thermal runaway.
The device is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient per Fig. 2 of the datasheet. With RθJA = 75 °C/W and RθJL = 15 °C/W, thermal management relies primarily on PCB copper pad area (0.31" × 0.31") rather than external heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA test current - defines precise overvoltage triggering threshold for bidirectional surge events |
| VWM | 5.8 V - maximum continuous reverse working voltage before leakage exceeds 1000 µA; sets safe operating margin below VBR |
| VC @ IPPM | 10.5 V at 143 A peak pulse - clamping voltage under 1500 W 10/1000 µs surge; determines protected circuit's maximum transient exposure |
| PPPM | 1500 W - peak pulse power handling with 0.01% duty cycle; supports repetitive lightning-induced surges in automotive CAN/LIN lines |
| IPPM | 143 A - peak pulse current capacity; enables protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges when properly laid out |
| TJ max | +150 °C - maximum junction temperature; allows operation in under-hood automotive environments without derating |
| MSL Level | Level 1 (JEDEC J-STD-020) - supports standard reflow profiles up to 260 °C peak without baking or special handling |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical anode/cathode pairs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction between leads |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; device conducts equally in both directions during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges up to 4 kV without degradation when mounted on recommended 8 mm × 8 mm copper pads |
| Low clamping ratio (VC/VBR ≈ 1.54) | Minimizes voltage overshoot during fast transients - critical for protecting 5 V and 3.3 V logic interfaces downstream of the TVS |
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1000 µA), and long-term parameter stability under thermal stress |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow profiles; eliminates pre-bake requirements and simplifies high-volume SMT manufacturing |
Applications
| Automotive Sensor Interface | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle cabins. IC Role / Device Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before it reaches sensitive ASICs. Use Value: Maintains signal integrity by limiting transient voltage to ≤10.5 V, preventing latch-up or damage to 5 V tolerant receivers. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to 24 V DC field wiring surges and relay coil flyback. IC Role / Device Role: Primary overvoltage clamp on 24 V supply rails and discrete input channels, operating in parallel with upstream fuses. Use Value: Absorbs up to 1500 W of transient energy without failure, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) standards. |
| Telecom Power Line Protection | Consumer USB Port ESD Suppression |
|
Use Scenario: Secondary surge protection on -48 V telecom power feeds entering base station equipment cabinets. IC Role / Device Role: Coordinated clamping device staged after gas discharge tube (GDT) primary protectors to handle residual fast-rising transients. Use Value: Fast response time (<1 ns) and low VC ensure downstream DC/DC converters and monitoring ICs remain within safe operating voltage limits. |
Use Scenario: Board-level ESD protection for USB 2.0 data lines (D+/D−) and VBUS in portable audio/video devices. IC Role / Device Role: Low-capacitance bidirectional TVS placed adjacent to USB connector to divert ±15 kV contact discharge per IEC 61000-4-2. Use Value: Clamps ESD events to <12 V within nanoseconds while adding <15 pF capacitance - preserving signal rise/fall times and eye diagram integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8CA | Lower peak power rating (600 W vs. 1500 W); same VBR (6.45–7.14 V) and VC (10.5 V); SMB package (smaller footprint, higher RθJA) | Best suited for space-constrained consumer electronics where surge threat level is limited to IEC 61000-4-2 ESD only | Select when board area is critical and full IEC 61000-4-5 Level 4 surge immunity is not required. |
| 1.5KE6.8CA | Higher VC (11.5 V), same PPPM (1500 W), axial-leaded DO-201 package - not SMT-compatible | Used in legacy through-hole designs or prototyping; lacks AEC-Q101 qualification and MSL Level 1 rating | Choose only for non-automotive, non-SMT applications where reworkability or hand-soldering is prioritized over production scalability. |
Compared with SMBJ6.8CA and 1.5KE6.8CA, the 1.5SMC6.8CAHE3/57T uniquely combines AEC-Q101 qualification, 1500 W surge capability, SMC SMT packaging, and MSL Level 1 - making it the only option qualified for volume automotive production requiring zero reflow process deviations and guaranteed surge immunity.
Availability
1.5SMC6.8CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, telecom power line hardening, and consumer USB port ESD suppression requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC6.8CAHE3/57T 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, precision, and automotive-grade qualification.
The 1.5SMC Series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance, 1500 W surge handling, and SMT manufacturability are mandatory.
FAQ
What does the "CA" suffix indicate in 1.5SMC6.8CAHE3/57T?
The "CA" suffix in 1.5SMC6.8CAHE3/57T denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression for both positive and negative polarity surges. Unlike unidirectional variants (e.g., 1.5SMC6.8A), the CA version has no polarity marking and functions identically regardless of voltage polarity applied across its terminals. This makes 1.5SMC6.8CAHE3/57T ideal for AC-coupled lines, differential buses like LIN or RS-485, and any application where transient direction is unpredictable.
Is 1.5SMC6.8CAHE3/57T qualified for automotive use?
Yes, 1.5SMC6.8CAHE3/57T is AEC-Q101 qualified, as confirmed by its "HE3" suffix - indicating RoHS-compliant construction with automotive-grade reliability validation. It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD robustness verification per AEC-Q101 standards. This qualification enables its use in engine control units, ADAS sensors, infotainment systems, and other safety-critical automotive subsystems where component failure could impact vehicle operation.
What is the clamping voltage of 1.5SMC6.8CAHE3/57T under maximum surge conditions?
The clamping voltage (VC) of 1.5SMC6.8CAHE3/57T is 10.5 V at its rated peak pulse current (IPPM) of 143 A, measured using the standardized 10/1000 µs double-exponential surge waveform. This value represents the maximum voltage that will appear across protected circuitry during a full 1500 W transient event. The low VC relative to its 6.8 V nominal breakdown ensures effective protection of 5 V and 3.3 V logic components without overstressing downstream ICs.
Does 1.5SMC6.8CAHE3/57T require special PCB layout considerations?
Yes - optimal performance of 1.5SMC6.8CAHE3/57T requires mounting on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Smaller pads increase thermal resistance and reduce surge current handling, potentially causing premature failure during repeated transients. Short, direct traces to protected nodes and low-inductance grounding are also essential to preserve sub-nanosecond response time and prevent voltage overshoot due to parasitic inductance.
How does the "HE3" suffix differ from "E3" in the 1.5SMC6.8CAHE3/57T part number?
The "HE3" suffix in 1.5SMC6.8CAHE3/57T indicates RoHS-compliant construction with AEC-Q101 qualification, whereas "E3" alone denotes RoHS compliance only for commercial-grade parts. The "H" prefix in HE3 explicitly identifies the automotive-qualified variant - verified for extended temperature operation (-65 °C to +150 °C), enhanced mechanical robustness, and long-term reliability under automotive stress profiles. This distinction is critical for OEM approvals and production traceability in automotive supply chains.
1.5SMC6.8CAHE3/57T 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)
1.5SMC6.8CAHE3/57T FAQ
1.How can I place an order for 1.5SMC6.8CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8CAHE3/57T 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 1.5SMC6.8CAHE3/57T reliable?
The price and inventory of 1.5SMC6.8CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8CAHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8CAHE3/57T?
1.5SMC6.8CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8CAHE3/57T 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 1.5SMC6.8CAHE3/57T?
For technical support, including 1.5SMC6.8CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8CAHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC6.8CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8CAHE3/57T 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 1.5SMC6.8CAHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8CAHE3/57T?
All 1.5SMC6.8CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8CAHE3/57T, 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 1.5SMC6.8CAHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC6.8CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8CAHE3/57T Tags
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Diodes Incorporated
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