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Vishay General Semiconductor - Diodes Division 1.5SMC6.8AHE3/57T
- Part No.:
- 1.5SMC6.8AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8AHE3/57T.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,677
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Product details
Overview
1.5SMC6.8AHE3/57T from Vishay General Semiconductor is a unidirectional 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), 5.8 V stand-off voltage (VWM), 1500 W peak pulse power (10/1000 µs), 10.5 V clamping voltage at 143 A, and AEC-Q101 qualification - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC6.8AHE3/57T datasheet, 1.5SMC6.8AHE3/57T pinout, 1.5SMC6.8AHE3/57T application, or 1.5SMC6.8AHE3/57T equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, 10.5 V clamping performance under 143 A surge, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This TVS diode operates as a clamping device that transitions from high-impedance standby to low-impedance conduction when reverse voltage exceeds VBR = 6.45–7.14 V at 10 mA test current. Its glass-passivated junction ensures stable avalanche behavior and fast response (<1 ns) to transients induced by ESD, lightning, or inductive switching.
Thermal design relies on RθJA = 75 °C/W and RθJL = 15 °C/W, with derating above 25 °C per Figure 2. The 1.5SMC6.8AHE3/57T is rated for TJ = –65 to +150 °C and meets J-STD-020 MSL Level 1 (260 °C peak reflow), supporting automated SMT assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA - defines precise avalanche initiation threshold for predictable clamping onset |
| VWM | 5.80 V - maximum continuous reverse operating voltage before leakage exceeds 1000 µA |
| VC @ IPPM | 10.5 V at 143 A - clamped voltage during 1500 W 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 1500 W - peak pulse power handling capability under standardized surge waveform |
| IPPM | 143 A - maximum non-repetitive peak pulse current supported at VC = 10.5 V |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test requirements (HTOL, TC, HAST, etc.) |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to system ground or lower-potential rail; defines direction of clamping action |
| Cathode | Avalanche conduction terminal / Surge return path | Banded end; connected to protected line (e.g., 5 V supply or CAN_H); carries full surge current to ground |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables protection against severe transients like ISO 7637-2 Pulse 5a (load dump) in 12 V automotive systems |
| 10.5 V clamping voltage at 143 A | Keeps protected ICs (e.g., microcontrollers, transceivers) below absolute maximum ratings during surge events |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive use - supports PPAP documentation and long-term reliability in harsh environments |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-bake requirement and enables standard lead-free reflow profiles in high-volume manufacturing |
| Glass passivated junction | Ensures stable, repeatable avalanche characteristics over lifetime and temperature (-65 to +150 °C) |
Applications
| Automotive Sensor Interface | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) from load dump and jump-start transients in vehicle ECUs. IC Role / Device Role: Unidirectional TVS placed between sensor signal line and chassis ground to clamp surges before reaching ADC input. Use Value: Maintains signal integrity by limiting voltage excursion to ≤10.5 V during 143 A transients, preventing ADC saturation or latch-up. |
Use Scenario: Safeguarding 24 V digital inputs on programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role: Standoff-rated TVS on input terminal block, shunting energy to common ground during inductive kick events. Use Value: Withstands repetitive 1500 W pulses at 0.01% duty cycle, ensuring long-term reliability without degradation in factory automation settings. |
| USB Power Line Protection | DC Motor Driver Supply Rail |
|
Use Scenario: Overvoltage suppression on VBUS line of USB-C ports in automotive infotainment head units. IC Role / Device Role: Primary clamping device upstream of USB PD controller, sized for 5.8 V VWM to avoid false triggering during normal 5 V operation. Use Value: Fast <1 ns response captures ESD events (IEC 61000-4-2 ±15 kV contact) while 10.5 V clamping preserves USB PHY tolerance margins. |
Use Scenario: Protecting H-bridge gate drivers and logic supplies from back-EMF spikes generated by brushed DC motors in power seats or HVAC actuators. IC Role / Device Role: TVS mounted across motor supply rail (e.g., 12 V battery feed) to clamp inductive spikes before they propagate into control circuitry. Use Value: 1500 W rating handles high-energy flyback pulses; AEC-Q101 qualification ensures survivability in automotive thermal cycling and vibration environments. |
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-E3/52 | Lower PPPM = 600 W; SMB (DO-214AA) package; same VBR/VC specs but reduced surge capacity | Suitable for consumer electronics or lower-energy industrial signals where 1500 W margin is unnecessary | Select when board space is constrained and surge threat level is limited to IEC 61000-4-5 Level 3 (0.5 kV) |
| 1.5KE6.8A-E3/54 | Through-hole TO-204AE (DO-41); identical electrical specs but incompatible mounting and higher RθJA = 100 °C/W | Used in legacy designs or prototyping where SMT is unavailable; not suitable for automated high-volume production | Choose only for repair, replacement, or non-SMT platforms - not recommended for new automotive or industrial SMT designs |
Compared with 1.5SMC6.8AHE3/57T, SMBJ6.8A-E3/52 offers footprint reduction at the cost of 60% lower surge energy handling, while 1.5KE6.8A-E3/54 sacrifices modern SMT manufacturability and thermal performance for through-hole compatibility - neither is pin-compatible, and both require PCB redesign.
Availability
1.5SMC6.8AHE3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O terminals, USB-C power delivery circuits, and DC motor driver supply rails requiring stable component supply with AEC-Q101 assurance and SMC package compatibility.
Supply support for 1.5SMC6.8AHE3/57T 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, efficiency, and application-specific validation.
The 1.5SMC Series is engineered for high-energy transient suppression in automotive, industrial, and telecom infrastructure - delivering consistent clamping performance and AEC-Q101 compliance in compact SMC packaging.
FAQ
What is the clamping voltage of the 1.5SMC6.8AHE3/57T under maximum surge conditions?
The 1.5SMC6.8AHE3/57T clamps to 10.5 V at its peak pulse current of 143 A, measured using the standardized 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet (Document Number 88303, page 2) and represents the maximum voltage seen by downstream circuitry during a full 1500 W transient event - critical for ensuring protected ICs remain within their absolute maximum ratings.
Is the 1.5SMC6.8AHE3/57T suitable for automotive applications?
Yes, the 1.5SMC6.8AHE3/57T is AEC-Q101 qualified (indicated by the HE3 suffix), meaning it has passed rigorous stress tests including high-temperature operating life, temperature cycling, and humidity testing required for automotive electronics. It is explicitly listed in Vishay's automotive ordering codes and used in ECU sensor protection, infotainment power rails, and body control modules.
What does the "HE3" suffix mean in 1.5SMC6.8AHE3/57T?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from commercial-grade E3 or M3 variants. Per Vishay's ordering information (page 3), HE3 parts meet automotive reliability standards and are supplied in 7" tape-and-reel (57T) packaging with moisture-sensitive level 1 handling, making 1.5SMC6.8AHE3/57T appropriate for high-reliability automotive production lines.
How does the 1.5SMC6.8AHE3/57T differ from bidirectional TVS diodes like 1.5SMC6.8CAHE3/57T?
The 1.5SMC6.8AHE3/57T is unidirectional and features a cathode band for polarity-sensitive placement, enabling asymmetric clamping ideal for DC power rails and grounded-signal lines. In contrast, 1.5SMC6.8CAHE3/57T is bidirectional with no polarity marking and symmetric VBR in both directions - suited for AC-coupled or floating signal lines like RS-485 or Ethernet. Their electrical specs (VBR, VC) differ slightly due to internal structure.
What is the thermal resistance of the 1.5SMC6.8AHE3/57T, and how does it affect layout?
The 1.5SMC6.8AHE3/57T has RθJA = 75 °C/W (junction-to-ambient) and RθJL = 15 °C/W (junction-to-leads), per Vishay's Thermal Characteristics table (page 3). To maintain safe operation under repeated surges, PCB layout must use minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal - smaller pads increase thermal resistance and risk junction overheating during high-duty-cycle transients.
1.5SMC6.8AHE3/57T 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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC6.8AHE3/57T FAQ
1.How can I place an order for 1.5SMC6.8AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8AHE3/57T 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 1.5SMC6.8AHE3/57T reliable?
The price and inventory of 1.5SMC6.8AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8AHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8AHE3/57T?
1.5SMC6.8AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8AHE3/57T 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 1.5SMC6.8AHE3/57T?
For technical support, including 1.5SMC6.8AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8AHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC6.8AHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8AHE3/57T 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 1.5SMC6.8AHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8AHE3/57T?
All 1.5SMC6.8AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8AHE3/57T, 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 1.5SMC6.8AHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC6.8AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8AHE3/57T Tags
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