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Vishay General Semiconductor - Diodes Division 1.5SMC6.8CA-E3/57T
- Part No.:
- 1.5SMC6.8CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8CA-E3/57T.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
1.5SMC6.8CA-E3/57T from Vishay General Semiconductor is a bidirectional surface-mount 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), 1500 W peak pulse power (10/1000 μs), 143 A peak pulse current, and clamps to 10.5 V at rated surge - deployed in automotive sensor interfaces, industrial I/O ports, and telecom line protection.
For engineers reviewing the 1.5SMC6.8CA-E3/57T datasheet, 1.5SMC6.8CA-E3/57T pinout, 1.5SMC6.8CA-E3/57T application, or 1.5SMC6.8CA-E3/57T equivalent, this device delivers verified bidirectional clamping performance, AEC-Q101 qualification readiness (via HE3 suffix variants), RoHS-compliant SMC (DO-214AB) packaging, and MSL Level 1 moisture sensitivity - critical for high-reliability board-level ESD and lightning surge protection design.
Technical Context
The 1.5SMC6.8CA-E3/57T operates as a symmetric bidirectional TVS, with identical electrical characteristics in both polarities - enabling single-device protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance (±5% min/max), low incremental surge resistance, and fast sub-nanosecond response to transients.
Thermally, it uses the SMC (DO-214AB) package with RθJA = 75 °C/W and RθJL = 15 °C/W, supporting 6.5 W steady-state dissipation on infinite heatsink at 50 °C ambient. It meets J-STD-020 MSL Level 1 and is rated for -65 °C to +150 °C junction operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA test current - defines precise clamping onset threshold under surge conditions |
| VWM | 5.8 V - maximum continuous reverse voltage before leakage exceeds 1000 μA; sets safe operating margin below breakdown |
| IPPM | 143 A (10/1000 μs waveform) - peak surge current handling capacity with defined clamping voltage |
| VC @ IPPM | 10.5 V - clamped voltage during full-rated surge, limiting downstream IC stress to safe levels |
| PPPM | 1500 W - peak transient power absorption capability, enabling protection against IEC 61000-4-5 Level 4 surges |
| Leakage @ VWM | 1000 μA max - low standby current preserves signal integrity and battery life in always-on circuits |
| TJ Range | -65 °C to +150 °C - supports operation in under-hood automotive, industrial control, and outdoor telecom environments |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical two-terminal construction.
| 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 |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; device conducts equally in both directions above VBR |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating lines without external polarity management |
| 1500 W peak pulse power (10/1000 μs) | Withstands severe lightning-induced surges per IEC 61000-4-5, reducing need for multi-stage protection |
| Low clamping ratio (VC/VBR ≈ 1.5) | Minimizes voltage overshoot during clamping - critical for safeguarding 5 V and 3.3 V logic interfaces |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking or special handling |
| AEC-Q101 qualification path (HE3/HM3 variants) | Validates reliability for automotive applications including engine control, ADAS sensors, and body electronics |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., temperature, pressure) from load-dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal pair or between signal and ground to clamp ±100 V spikes within nanoseconds. Use Value: Prevents latch-up or gate oxide damage in MCU input buffers and transceiver ICs while maintaining signal fidelity at DC and low frequencies. |
Use Scenario: Shielding 24 V digital input modules in programmable logic controllers from field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Standoff device mounted at connector entry point to shunt >1 kV transients before reaching optocoupler or Schmitt trigger inputs. Use Value: Eliminates false triggering and extends mean time between failures (MTBF) in factory automation systems operating in electrically noisy environments. |
| Telecom Line Interface | Consumer USB/UART Port Protection |
|
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs in base station backhaul equipment exposed to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired bidirectional TVS units (line-to-line and line-to-ground) providing coordinated clamping for differential signaling standards. Use Value: Maintains signal integrity up to 20 Mbps while meeting GR-1089-CORE Level 3 surge immunity requirements. |
Use Scenario: Adding secondary surge protection to USB 2.0 data lines and UART debug ports in smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical) TVS placed after primary ESD diodes to absorb higher-energy transients missed by on-die protection. Use Value: Passes IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) and prevents firmware corruption during field deployment. |
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 PPPM (600 W), same VBR/VWM, SMB (DO-214AA) package - 30% smaller footprint, lower thermal mass | Best suited for space-constrained consumer PCBs where surge severity is moderate (IEC 61000-4-5 Level 2) | Select when board area is critical and peak surge energy is ≤600 W; verify thermal derating for sustained pulses |
| 1.5KE6.8CA | Higher PPPM (1500 W), through-hole DO-15 package - superior heat sinking but incompatible with automated SMT assembly | Preferred for legacy industrial power supplies and repair scenarios requiring manual soldering and mechanical robustness | Choose only if SMT is unavailable or if long-term thermal cycling reliability outweighs assembly efficiency |
Compared with SMBJ6.8CA and 1.5KE6.8CA, the 1.5SMC6.8CA-E3/57T uniquely balances high-power SMT compatibility, bidirectional symmetry, and automotive-grade process control - making it optimal for new designs targeting production scalability and AEC-Q101 alignment.
Availability
1.5SMC6.8CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer USB port protection requiring stable component supply across high-volume manufacturing cycles.
Supply support for 1.5SMC6.8CA-E3/57T 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 application-specific optimization.
The 1.5SMC Series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated.
FAQ
What does the "CA" suffix indicate in 1.5SMC6.8CA-E3/57T?
The "CA" suffix in 1.5SMC6.8CA-E3/57T denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical VBR, VC, and IPPM values regardless of voltage polarity. This eliminates the need for polarity-aware placement and simplifies layout for AC-coupled or floating signal lines.
Is 1.5SMC6.8CA-E3/57T RoHS-compliant and halogen-free?
Yes, the 1.5SMC6.8CA-E3/57T carries the "E3" suffix, indicating full RoHS compliance per EU Directive 2011/65/EU. It is not halogen-free; for halogen-free versions, select the "M3" suffix variant (e.g., 1.5SMC6.8CA-M3/57T), which meets IEC 61249-2-21 requirements.
What is the maximum clamping voltage of 1.5SMC6.8CA-E3/57T under rated surge conditions?
The 1.5SMC6.8CA-E3/57T clamps to a maximum of 10.5 V when subjected to its rated 143 A peak pulse current (10/1000 μs waveform). This value is guaranteed across the full operating temperature range and ensures downstream 5 V or 3.3 V logic components remain within absolute maximum ratings during surge events.
Can 1.5SMC6.8CA-E3/57T replace unidirectional 1.5SMC6.8A-E3/57T in existing designs?
No - the 1.5SMC6.8CA-E3/57T is bidirectional and lacks polarity marking, whereas the unidirectional 1.5SMC6.8A-E3/57T requires correct cathode orientation. Substituting them without circuit review risks improper clamping behavior in DC-biased lines; redesign validation is required to confirm protection efficacy.
Does 1.5SMC6.8CA-E3/57T meet AEC-Q101 for automotive use?
The 1.5SMC6.8CA-E3/57T itself is commercial-grade; however, Vishay offers AEC-Q101-qualified versions under the "HE3" (RoHS, AEC-Q101) and "HM3" (halogen-free, AEC-Q101) suffixes - e.g., 1.5SMC6.8CAHE3_A/H. These undergo stress testing per AEC-Q101 Rev D and are certified for automotive under-hood and chassis applications.
1.5SMC6.8CA-E3/57T 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:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC6.8CA-E3/57T FAQ
1.How can I place an order for 1.5SMC6.8CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8CA-E3/57T 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 1.5SMC6.8CA-E3/57T reliable?
The price and inventory of 1.5SMC6.8CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8CA-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8CA-E3/57T?
1.5SMC6.8CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8CA-E3/57T 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 1.5SMC6.8CA-E3/57T?
For technical support, including 1.5SMC6.8CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8CA-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC6.8CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8CA-E3/57T 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 1.5SMC6.8CA-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8CA-E3/57T?
All 1.5SMC6.8CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8CA-E3/57T, 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 1.5SMC6.8CA-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC6.8CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8CA-E3/57T Tags
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