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Vishay General Semiconductor - Diodes Division 1.5SMC6.8A-E3/9AT
- Part No.:
- 1.5SMC6.8A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8A-E3/9AT.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,191
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Product details
Overview
1.5SMC6.8A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in power rails and signal lines. It features a 6.8 V breakdown voltage (VBR), 5.8 V stand-off voltage (VWM), 10.5 V clamping voltage at 143 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates across -65 °C to +150 °C junction temperature range - deployed in automotive sensor interfaces and industrial DC power inputs.
For engineers reviewing the 1.5SMC6.8A-E3/9AT datasheet, 1.5SMC6.8A-E3/9AT pinout, 1.5SMC6.8A-E3/9AT application, or 1.5SMC6.8A-E3/9AT equivalent, this page delivers verified electrical parameters, SMC (DO-214AB) package details, clamping performance under surge conditions, thermal resistance data, and RoHS-compliant commercial-grade sourcing context.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ns), low incremental surge resistance, and stable clamping during transient events such as ESD, lightning-induced surges, and inductive switching spikes. Its 10.5 V clamping voltage at 143 A ensures robust protection of downstream 5 V logic circuits without overstressing IC inputs.
The device is rated for 1500 W peak pulse power per 10/1000 µs waveform with 0.01 % duty cycle, derated above 25 °C ambient per Fig. 2, and exhibits 75 °C/W junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads - enabling reliable operation in compact, thermally constrained PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA test current - defines precise voltage threshold where avalanche conduction begins, critical for matching system-level overvoltage trip margins. |
| VWM | 5.8 V - maximum continuous reverse operating voltage before leakage exceeds 1000 µA; sets safe DC bias limit for 5 V rail protection. |
| VC @ IPPM | 10.5 V at 143 A - clamped voltage during worst-case 1500 W transient; determines maximum stress imposed on protected ICs. |
| IPPM | 143 A - peak pulse current capability under 10/1000 µs waveform; quantifies surge energy handling capacity for IEC 61000-4-5 Level 4 compliance. |
| PPPM | 1500 W - peak pulse power rating; enables single-device protection against high-energy transients without cascaded staging. |
| TJ max. | +150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial environments without derating. |
| RθJA | 75 °C/W - thermal resistance junction-to-ambient on recommended pad layout; informs thermal design margin for sustained surge repetition. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating and MSL level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point in unidirectional configuration | Connected to protected circuit's positive rail; reverse-biased during normal operation, avalanches to ground when VIN > VC. |
| Anode | Ground reference terminal | Connected directly to system ground plane; provides low-inductance return path for surge current to minimize VPEAK overshoot. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 4 kV/2 Ω surge without external series impedance or staged clamping. |
| 10.5 V clamping voltage at 143 A | Ensures protected 5 V logic ICs experience <11 V stress during full-rated surge, preserving input stage reliability. |
| Glass-passivated chip junction | Delivers stable VBR tolerance (±5 %), low leakage (<1000 µA at VWM), and long-term parameter stability under thermal cycling. |
| RoHS-compliant, commercial-grade (E3 suffix) | Meets EU RoHS Directive 2011/65/EU and JESD201 Class 2 whisker resistance; suitable for consumer, industrial, and non-AEC-Q101 automotive subsystems. |
| Low-profile SMC (DO-214AB) package | 0.320" × 0.246" footprint with 0.126" height enables high-density placement near connectors or IC power pins without mechanical interference. |
Applications
| Automotive Sensor Interface Protection | Industrial DC Power Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN transceiver supply pins and analog sensor outputs (e.g., pressure, temperature) from load-dump and jump-start transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND, clamping surges within nanoseconds to prevent latch-up or gate oxide damage in front-end amplifiers and communication ICs. Use Value: With 5.8 V VWM, it remains fully blocking during nominal 5 V or 12 V rail operation while clamping to 10.5 V - maintaining signal integrity and preventing false resets. |
Use Scenario: Safeguarding 24 V DC input stages of PLC modules, motor drives, and HMI panels against inductive kickback from solenoids, relays, and contactors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on bulk input rail, absorbing up to 1500 W surge energy without degradation, coordinated with upstream fuses or poly-switches. Use Value: 143 A IPPM and 10.5 V VC ensure downstream DC-DC converters and microcontrollers survive repetitive 10/1000 µs transients per IEC 61000-4-4. |
| Consumer USB Power Delivery Protection | Telecom Ethernet Port Surge Suppression |
Use Scenario: Guarding 5 V VBUS lines in USB-C PD adapters and portable chargers against ESD (IEC 61000-4-2 ±15 kV air) and hot-swap voltage spikes. IC Role / Device Role / Timing Role: Fast-acting shunt device placed immediately after USB connector, diverting transient current away from USB controller and power management ICs. Use Value: Sub-1 ns response time and 1000 µA max leakage at 5.8 V ensure no impact on steady-state USB enumeration or charging efficiency. |
Use Scenario: Front-end protection for PoE-powered Ethernet PHYs and magnetics in network switches, IP cameras, and access points exposed to lightning-induced surges on RJ45 lines. IC Role / Device Role / Timing Role: Unidirectional clamp on isolated DC bias rails feeding Ethernet magnetics, suppressing common-mode transients before they couple into differential pairs. Use Value: 75 °C/W RθJA and 150 °C TJ max allow operation in sealed enclosures with limited airflow while sustaining repeated surge events. |
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 (Vishay) | Lower 600 W PPPM, same VBR/VWM, SMB (DO-214AA) package - 30 % smaller footprint but 40 % lower surge rating. | Suitable for space-constrained consumer electronics with lower surge exposure (e.g., USB 2.0 ports), not for industrial 10/1000 µs compliance. | Select when board area is critical and surge threat level is ≤600 W; verify thermal margin due to higher RθJA (~100 °C/W). |
| 1.5KE6.8A (ON Semiconductor) | Through-hole DO-201 package, identical 1500 W rating and 6.8 V VBR, but larger size and manual assembly requirement. | Used in legacy industrial power supplies and telecom line cards where automated SMT is unavailable or through-hole reliability is mandated. | Choose only for through-hole production lines or where SMC reflow compatibility is prohibited; avoid for new SMT designs due to placement inefficiency. |
Compared with SMBJ6.8A-E3/52T, the 1.5SMC6.8A-E3/9AT delivers 2.5× higher surge power in a slightly larger but still SMT-compatible package; versus 1.5KE6.8A, it enables automated high-volume assembly while maintaining full 1500 W capability - making it optimal for modern automotive and industrial SMT platforms requiring both robustness and manufacturability.
Availability
1.5SMC6.8A-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial DC power inputs, consumer USB power delivery, and telecom Ethernet port protection requiring stable component supply, consistent RoHS-compliant material traceability, and volume-ready tape-and-reel packaging (3500 pcs per 13" reel).
Supply support for 1.5SMC6.8A-E3/9AT 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, precision, and application-specific optimization.
The 1.5SMC Series targets high-energy transient suppression in automotive, industrial, and communications systems - engineered for rapid response, stable clamping, and robust thermal performance in surface-mount power protection roles.
FAQ
What is the clamping voltage of the 1.5SMC6.8A-E3/9AT under full-rated surge conditions?
The 1.5SMC6.8A-E3/9AT 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 measured per standard test conditions and guarantees that protected downstream components see no more than 10.5 V during worst-case transient events - essential for safeguarding 5 V logic interfaces without overstress.
Is the 1.5SMC6.8A-E3/9AT suitable for automotive applications requiring AEC-Q101 qualification?
No - the 1.5SMC6.8A-E3/9AT carries the E3 suffix, indicating RoHS-compliant commercial grade only. For AEC-Q101 qualified versions, select the 1.5SMC6.8AHE3_A/H or 1.5SMC6.8AHE3_A/I variants, which include additional stress testing and traceability for automotive subsystems such as body control modules and sensor nodes.
What is the maximum steady-state reverse voltage the 1.5SMC6.8A-E3/9AT can withstand continuously?
The 1.5SMC6.8A-E3/9AT has a maximum reverse stand-off voltage (VWM) of 5.8 V at 25 °C. This means it remains in high-impedance blocking mode up to 5.8 V DC or RMS AC, with reverse leakage held below 1000 µA - making it ideal for protecting 5 V systems while avoiding false triggering during normal operation.
How does the SMC (DO-214AB) package of the 1.5SMC6.8A-E3/9AT compare thermally to smaller packages like SMB?
The SMC (DO-214AB) package of the 1.5SMC6.8A-E3/9AT offers a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W on standard 8.0 mm × 8.0 mm copper pads - significantly lower than SMB's ~100 °C/W. This 25 % improvement allows the 1.5SMC6.8A-E3/9AT to sustain higher surge repetition rates and maintain lower junction temperatures in thermally dense layouts.
Can the 1.5SMC6.8A-E3/9AT be used in bidirectional protection circuits?
No - the 1.5SMC6.8A-E3/9AT is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. For bidirectional protection (e.g., AC lines or differential data buses), use the CA-suffixed variant 1.5SMC6.8CA-E3/9AT, which provides symmetrical clamping in both polarities and no polarity marking.
1.5SMC6.8A-E3/9AT 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:
- 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-E3/9AT FAQ
1.How can I place an order for 1.5SMC6.8A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8A-E3/9AT 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 1.5SMC6.8A-E3/9AT reliable?
The price and inventory of 1.5SMC6.8A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8A-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8A-E3/9AT?
1.5SMC6.8A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8A-E3/9AT 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 1.5SMC6.8A-E3/9AT?
For technical support, including 1.5SMC6.8A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8A-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC6.8A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8A-E3/9AT 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 1.5SMC6.8A-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8A-E3/9AT?
All 1.5SMC6.8A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8A-E3/9AT, 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 1.5SMC6.8A-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC6.8A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8A-E3/9AT Tags
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