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Vishay General Semiconductor - Diodes Division 1.5SMC6.8A-E3/57T
- Part No.:
- 1.5SMC6.8A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8A-E3/57T.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,063
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Product details
Overview
1.5SMC6.8A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 6.8 V breakdown voltage (VBR = 6.45–7.14 V at IT = 10 mA), 5.8 V stand-off voltage (VWM), clamps to ≤10.5 V at 143 A peak pulse current (IPPM), and delivers 1500 W peak pulse power with a 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and consumer power supply inputs.
For engineers reviewing the 1.5SMC6.8A-E3/57T datasheet, 1.5SMC6.8A-E3/57T pinout, 1.5SMC6.8A-E3/57T application, or 1.5SMC6.8A-E3/57T equivalent, this page provides verified electrical parameters, SMC (DO-214AB) package details, clamping performance under surge conditions, thermal derating curves, and AEC-Q101-qualified alternatives for automotive-grade design-in.
Technical Context
The 1.5SMC6.8A-E3/57T operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%), low incremental surge resistance, and fast response time (<1 ns) to transient events such as ESD, lightning-induced surges, and inductive switching spikes.
Mounted on standard 8.0 mm × 8.0 mm copper pads, it sustains 1500 W peak pulse power per 10/1000 µs waveform at TA = 25 °C, with thermal resistance RθJA = 75 °C/W and maximum junction temperature of +150 °C. Derating begins above 25 °C per Figure 2 in the datasheet, and polarity is marked by a cathode band.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA - defines precise avalanche initiation window for reliable overvoltage triggering |
| VWM | 5.8 V - maximum continuous reverse operating voltage before leakage exceeds 1000 µA |
| VC @ IPPM | ≤10.5 V at 143 A - clamping voltage limiting downstream IC stress during 1500 W transients |
| IPPM | 143 A - peak surge current capability with 10/1000 µs waveform, enabling IEC 61000-4-5 Level 4 compliance |
| PPPM | 1500 W - peak pulse power rating confirming suitability for high-energy transient suppression |
| TJ max | +150 °C - junction temperature limit supporting operation in under-hood automotive and industrial environments |
| RθJA | 75 °C/W - thermal resistance indicating need for adequate PCB copper area (8.0 mm × 8.0 mm pads) for power dissipation |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002 solderability standards. Cathode indicated by a band on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Reverse-biased avalanche terminal | Connected to protected line (e.g., 5 V rail); conducts when voltage exceeds VBR, shunting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against severe transients including IEC 61000-4-5 4 kV surge tests without failure |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage across temperature and lifetime |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow processes without moisture-related popcorning |
| AEC-Q101 qualified option | Available as 1.5SMC6.8AHE3_A - validated for automotive applications including engine control and ADAS sensors |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD >15 kV) |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) 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 surges before reaching sensitive analog front-end or communication ICs. Use Value: Limits voltage to ≤10.5 V during 143 A transients, preventing latch-up or permanent damage to 5 V-tolerant sensor interface ICs. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input filter stage, working with series impedance to reduce energy delivered to optocoupler or Schmitt trigger input. Use Value: Withstands repetitive 1500 W pulses at 0.01% duty cycle, ensuring reliability in factory automation environments with frequent inductive switching. |
| Consumer Power Supply Input | Telecom Line Interface |
Use Scenario: Secondary-side transient suppression on 5 V/12 V DC outputs of AC-DC adapters and USB PD power bricks. IC Role / Device Role / Timing Role: Fast-acting shunt device that activates within nanoseconds to protect downstream DC-DC converters and USB port controllers. Use Value: Clamps 10/1000 µs surges to ≤10.5 V while maintaining <1000 µA leakage at 5.8 V, preserving standby efficiency. |
Use Scenario: Overvoltage protection on Ethernet PHY power pins (e.g., 3.3 V bias rails) and auxiliary control lines in PoE-powered switches and routers. IC Role / Device Role / Timing Role: Standoff-rated TVS suppressing induced surges from nearby AC mains or lightning coupling into low-voltage management circuits. Use Value: Meets GR-1089-CORE Level 3 surge immunity requirements with verified 143 A IPPM and low capacitance (<100 pF at 0 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.8A-E3/57T | Lower peak power (400 W), smaller SMA package (DO-214AC), same VBR range and unidirectional polarity | Suitable for space-constrained consumer electronics but not for 1500 W industrial surge events | Select when board area is critical and surge threat level is limited to IEC 61000-4-2 ESD or low-energy transients |
| 1.5SMC6.8AHE3_A | Identical electrical specs; AEC-Q101 qualified, RoHS-compliant, automotive-grade screening and traceability | Required for production automotive systems (e.g., body control modules, ADAS sensors) where qualification is mandatory | Choose for automotive designs needing certified reliability - same footprint and pinout, no layout change needed |
Compared with the 1.5SMC6.8A-E3/57T, the SMAJ6.8A-E3/57T offers reduced surge handling in a smaller package, while the 1.5SMC6.8AHE3_A provides identical protection performance with full automotive qualification - enabling drop-in use where AEC-Q101 compliance is required without redesign.
Availability
1.5SMC6.8A-E3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, and consumer power supply outputs requiring stable component supply, RoHS compliance, and proven 1500 W transient immunity.
Supply support for 1.5SMC6.8A-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, power handling, and automotive qualification.
The 1.5SMC Series was developed for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness against load dump, ESD, and lightning-induced surges is essential.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC6.8A-E3/57T?
The 1.5SMC6.8A-E3/57T has a breakdown voltage VBR of 6.45 V to 7.14 V at test current IT = 10 mA, representing a ±5% tolerance around the nominal 6.8 V rating. This tight tolerance ensures predictable clamping behavior in precision 5 V system protection, and is guaranteed per Vishay's 88303 datasheet revision 09-Mar-2026.
Is the 1.5SMC6.8A-E3/57T suitable for automotive applications?
The 1.5SMC6.8A-E3/57T is commercial-grade and RoHS-compliant, but not AEC-Q101 qualified. For automotive use, Vishay offers the pin-compatible 1.5SMC6.8AHE3_A variant - identical electrical specs with full AEC-Q101 qualification, traceability, and extended temperature validation. The 1.5SMC6.8A-E3/57T itself is intended for industrial and consumer applications.
What is the maximum clamping voltage of the 1.5SMC6.8A-E3/57T under surge conditions?
The 1.5SMC6.8A-E3/57T clamps to a maximum of 10.5 V at its rated peak pulse current IPPM = 143 A (10/1000 µs waveform). This value is measured under standardized test conditions with 8.0 mm × 8.0 mm copper pads and confirms effective protection for 5 V logic and interface ICs against high-energy transients.
Does the 1.5SMC6.8A-E3/57T have bidirectional capability?
No - the 1.5SMC6.8A-E3/57T is strictly unidirectional, with polarity indicated by a cathode band. Bidirectional variants use the "CA" suffix (e.g., 1.5SMC6.8CA). Using the 1.5SMC6.8A-E3/57T on AC or bipolar signal lines would result in forward conduction during negative half-cycles and potential failure.
What is the thermal resistance and recommended pad layout for the 1.5SMC6.8A-E3/57T?
The 1.5SMC6.8A-E3/57T has a typical junction-to-ambient thermal resistance RθJA of 75 °C/W, measured with 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To maintain safe junction temperature under repeated surges, PCB layout must replicate this minimum pad area and ensure adequate copper pour connectivity to ground or heat-spreading planes.
1.5SMC6.8A-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:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC6.8A-E3/57T FAQ
1.How can I place an order for 1.5SMC6.8A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8A-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 1.5SMC6.8A-E3/57T reliable?
The price and inventory of 1.5SMC6.8A-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 1.5SMC6.8A-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8A-E3/57T?
1.5SMC6.8A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8A-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 1.5SMC6.8A-E3/57T?
For technical support, including 1.5SMC6.8A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8A-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC6.8A-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8A-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 1.5SMC6.8A-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8A-E3/57T?
All 1.5SMC6.8A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8A-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 1.5SMC6.8A-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC6.8A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8A-E3/57T Tags
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