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Vishay General Semiconductor - Diodes Division 1.5SMC6.8AHE3/9AT
- Part No.:
- 1.5SMC6.8AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC6.8AHE3/9AT.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,233
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Product details
Overview
1.5SMC6.8AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on power and signal lines. It features 6.45 V to 7.14 V breakdown voltage (VBR) at 10 mA test current, 5.8 V standoff voltage (VWM), 1000 µA max reverse leakage at VWM, 143 A peak pulse current (IPPM), and 10.5 V clamping voltage (VC) under 10/1000 µs surge - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the 1.5SMC6.8AHE3/9AT datasheet, 1.5SMC6.8AHE3/9AT pinout, 1.5SMC6.8AHE3/9AT application, or 1.5SMC6.8AHE3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 1500 W peak pulse power rating, low clamping ratio (VC/VBR ≈ 1.52), and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device triggered by transient overvoltage events. Its glass-passivated junction enables fast response time (<1 ns), low incremental surge resistance, and stable performance across -65 °C to +150 °C operating temperature range. The cathode-band marking indicates polarity for unidirectional conduction.
It delivers 1500 W peak pulse power (10/1000 µs waveform, 0.01% duty cycle) with derating above 25 °C per Fig. 2, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. RoHS-compliant matte tin-plated leads ensure solderability per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA - defines precise breakdown threshold for reliable triggering |
| VWM | 5.8 V - maximum continuous reverse operating voltage before leakage rises significantly |
| IPPM | 143 A - peak surge current it safely clamps without failure under standardized 10/1000 µs waveform |
| VC | 10.5 V - clamped voltage during IPPM, limiting stress on downstream components |
| PPPM | 1500 W - peak transient power handling capability under defined pulse conditions |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Leakage (ID) | 1000 µA at VWM - low standby current minimizes system power loss in always-on circuits |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads. Cathode identified by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VREV > VBR |
| Anode (unbanded end) | Reference node | Typically tied to ground or lower-potential rail; completes clamping path during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| 1500 W peak pulse power | Withstands high-energy surges common in 12 V/24 V vehicle power systems and industrial controls |
| Low clamping voltage (10.5 V) | Provides tight protection margin for 5 V logic and 3.3 V microcontrollers without over-clamping |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking, reducing manufacturing complexity and cost |
| Glass passivated junction | Ensures long-term stability and low parameter drift under thermal and humidity stress |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp transients before they reach LDOs or MCUs. Use Value: Clamps to 10.5 V within nanoseconds, preventing latch-up or damage to 5 V tolerant components downstream. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to ADC inputs in PLC modules. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt ESD and inductive switching noise on signal lines. Use Value: 1000 µA leakage at 5.8 V ensures minimal impact on sensor accuracy while suppressing ±8 kV contact ESD per IEC 61000-4-2. |
| Consumer Power Adapter Input Stage | Telecom DC Feeder Line Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters supplying USB-C PD or PoE-powered devices. IC Role / Device Role / Timing Role: Standoff-rated TVS on 5–20 V output rails to absorb flyback spikes from transformer leakage inductance. Use Value: 143 A IPPM handles repetitive 10/1000 µs surges without degradation, supporting >100,000 surge cycles. |
Use Scenario: DC power feed protection in remote radio units powered via 48 V telecom distribution lines. IC Role / Device Role / Timing Role: Unidirectional TVS on positive supply rail to suppress lightning-induced surges coupled onto long-distance feeder cables. Use Value: 1500 W PPPM and 10.5 V VC limit voltage excursion below 12 V absolute maximum ratings of downstream DC/DC controllers. |
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 | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VBR range | Reduced surge handling; suitable only for lighter-duty consumer electronics | Select when board space is constrained and surge energy is ≤600 W |
| 1.5KE6.8A-T | Through-hole DO-15 package, identical electrical specs but no AEC-Q101 qualification | Lacks automotive qualification; not recommended for vehicular use | Choose for legacy through-hole designs where rework to SMT is impractical |
Compared with SMBJ6.8A-E3/52T and 1.5KE6.8A-T, the 1.5SMC6.8AHE3/9AT uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and SMC packaging - making it the only option among the three validated for automotive under-hood deployment with zero layout change required for SMT production.
Availability
1.5SMC6.8AHE3/9AT is available at Aetrix Electronics and suitable for automotive control units, industrial sensor nodes, and telecom power feeders requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC6.8AHE3/9AT 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, TVS, MOSFETs, and optoelectronics with emphasis on reliability and application-specific performance.
The 1.5SMC Series was developed to deliver high-power, surface-mount transient protection for automotive, industrial, and telecom systems where AEC-Q101 compliance, low clamping, and automated assembly are mandatory design requirements.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC6.8AHE3/9AT?
The 1.5SMC6.8AHE3/9AT has a specified breakdown voltage (VBR) range of 6.45 V to 7.14 V at 10 mA test current, representing ±5% tolerance around the nominal 6.8 V rating. This tight tolerance ensures consistent clamping behavior across production lots and supports predictable system-level surge margin calculations in designs using the 1.5SMC6.8AHE3/9AT.
Is the 1.5SMC6.8AHE3/9AT suitable for bidirectional transient protection?
No, the 1.5SMC6.8AHE3/9AT is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the 1.5SMC6.8CAHE3/9AT variant. Using the 1.5SMC6.8AHE3/9AT in bidirectional applications would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
Does the 1.5SMC6.8AHE3/9AT meet automotive qualification standards?
Yes, the "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction. The 1.5SMC6.8AHE3/9AT has passed stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev D, making it approved for use in automotive powertrain, body electronics, and ADAS modules where reliability under harsh environmental conditions is critical.
What is the thermal resistance of the 1.5SMC6.8AHE3/9AT in standard mounting?
The 1.5SMC6.8AHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes still air conditions and is essential for calculating safe power dissipation limits during repetitive surge events or elevated ambient temperatures in the final application of the 1.5SMC6.8AHE3/9AT.
How does the clamping voltage of the 1.5SMC6.8AHE3/9AT compare to its breakdown voltage?
The 1.5SMC6.8AHE3/9AT clamps to 10.5 V at its rated 143 A peak pulse current (IPPM), yielding a clamping ratio (VC/VBR) of approximately 1.52 using the typical VBR of 6.9 V. This low ratio reflects efficient voltage limiting - critical for protecting 5 V or 3.3 V ICs without over-stressing their absolute maximum ratings during surge events involving the 1.5SMC6.8AHE3/9AT.
1.5SMC6.8AHE3/9AT 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:
- 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)
1.5SMC6.8AHE3/9AT FAQ
1.How can I place an order for 1.5SMC6.8AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC6.8AHE3/9AT 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 1.5SMC6.8AHE3/9AT reliable?
The price and inventory of 1.5SMC6.8AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC6.8AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC6.8AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC6.8AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC6.8AHE3/9AT?
1.5SMC6.8AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC6.8AHE3/9AT 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 1.5SMC6.8AHE3/9AT?
For technical support, including 1.5SMC6.8AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC6.8AHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC6.8AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC6.8AHE3/9AT 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 1.5SMC6.8AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC6.8AHE3/9AT?
All 1.5SMC6.8AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC6.8AHE3/9AT, 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 1.5SMC6.8AHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC6.8AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC6.8AHE3/9AT Tags
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