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Vishay General Semiconductor - Diodes Division 1.5KE6.8HE3/73
- Part No.:
- 1.5KE6.8HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE6.8HE3/73.pdf
- Description:
- TVS DIODE 5.5VWM 10.8VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,501
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Product details
Overview
1.5KE6.8HE3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 6.8 V breakdown voltage (VBR = 6.45–7.14 V at 10 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 10.5 V at 143 A, and operates across –55 °C to +175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE6.8HE3/73 datasheet, 1.5KE6.8HE3/73 pinout, 1.5KE6.8HE3/73 application, or 1.5KE6.8HE3/73 equivalent, this part delivers verified surge immunity for automotive power supplies, industrial I/O modules, and telecom line cards where fast clamping (<1 ns), low incremental resistance, and AEC-Q101 qualification (via HE3 suffix) are required.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for high-energy transient suppression. Its unidirectional polarity enables cathode-referenced placement on positive-rail protection paths, with a 5.8 V maximum working voltage (VWM) and 1000 µA max reverse leakage at VWM.
The device exhibits a 0.057 %/°C temperature coefficient of VBR, ensuring stable breakdown across wide thermal ranges, and supports 200 A non-repetitive forward surge current (8.3 ms half-sine) - critical for handling repetitive load-dump events in 12 V automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA - defines precise clamping onset threshold for reliable overvoltage detection |
| VWM | 5.8 V - maximum continuous DC operating voltage before leakage exceeds 1000 µA |
| VC @ IPPM | 10.5 V at 143 A - clamped voltage during full 1500 W surge, limiting downstream stress |
| PPPM | 1500 W (10/1000 µs) - peak surge energy absorption capability per industry-standard waveform |
| IFSM | 200 A (8.3 ms half-sine) - robustness against automotive load-dump and battery reversal events |
| TJ range | –55 °C to +175 °C - validated operation in under-hood and industrial environments |
| Package | DO-201AD (Case Style 1.5KE) - axial-leaded, through-hole package with 0.375" lead length for mechanical stability |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, epoxy-molded body meeting UL 94 V-0; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for unidirectional clamping | Connected to ground or low-side return path; enables forward-biased conduction during negative transients |
| Cathode | Protected rail connection point | Connected to the line being protected (e.g., +12 V supply); conducts when VKA > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime, even under humidity and thermal cycling |
| 1500 W peak pulse rating | Withstands IEEE C62.41-compliant surges without degradation in single-event or low-duty-cycle applications |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive power electronics including engine control units and body controllers |
| 0.057 %/°C VBR tempco | Minimizes drift in clamping threshold across –40 °C to +125 °C ambient, supporting precision protection |
| 10.5 V clamping at 143 A | Delivers < 1.8× VWM ratio - tighter clamping margin than standard Zener-based protectors |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs in engine control units (ECUs) from load-dump transients up to 35 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges before they reach LDOs and microcontrollers. Use Value: Limits peak voltage to 10.5 V during 143 A transients, preventing latch-up or gate oxide damage in downstream 16 V-rated ICs. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules from ESD and cable discharge. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt fast transients (<1 ns response) before reaching op-amp front-end stages. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to <12 V, preserving 12-bit ADC accuracy and avoiding reset faults. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding Ethernet PHY power pins and bias rails in outdoor base station line cards exposed to induced lightning. IC Role / Device Role / Timing Role: Primary-level TVS on +3.3 V and +5 V bias rails, coordinated with GDT secondary protection. Use Value: Absorbs 1500 W (10/1000 µs) surges per Telcordia GR-1089-CORE, maintaining rail integrity during multi-kA events. | Use Scenario: Overvoltage suppression on AC-DC adapter primary-side DC bus after rectification, prior to PWM controller. IC Role / Device Role / Timing Role: Fast-acting clamp on bulk capacitor node to prevent overvoltage shutdown or MOSFET avalanche failure. Use Value: Responds in <1 ns to line-switching spikes, clamping to 10.5 V while sustaining 200 A surge current without parametric shift. |
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 | Lower PPPM (600 W), SMC package (surface-mount), VC = 11.2 V @ 53.3 A | Better suited for space-constrained PCBs; less robust for high-energy automotive load-dump | Select SMBJ6.8A only when board area is critical and surge energy is ≤600 W |
| 1.5KE6.8A-E3/54 | Same electrical specs, identical DO-201AD package, but commercial-grade (non-AEC-Q101) | Lacks automotive qualification; suitable for industrial/commercial power supplies without automotive lifecycle requirements | Choose 1.5KE6.8A-E3/54 for cost-sensitive non-automotive designs requiring same clamping performance |
Compared with SMBJ6.8A and 1.5KE6.8A-E3/54, the 1.5KE6.8HE3/73 provides AEC-Q101 validation and full 1500 W surge capacity in a proven through-hole package - making it the preferred choice for automotive and high-reliability industrial deployments where qualification and energy handling are non-negotiable.
Availability
1.5KE6.8HE3/73 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom line cards, and consumer power adapters requiring stable component supply across extended product lifecycles.
Supply support for 1.5KE6.8HE3/73 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, ruggedness, and application-specific qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of the 1.5KE6.8HE3/73 under maximum surge conditions?
The 1.5KE6.8HE3/73 clamps to 10.5 V at its peak pulse current of 143 A (10/1000 µs waveform). This value is measured per JEDEC standards and reflects the actual voltage seen by downstream circuitry during worst-case transient events. The low clamping ratio (VC/VWM ≈ 1.8) ensures effective protection of 12 V-rated components. Designers should verify layout parasitics do not elevate VC beyond this spec in their application.
Is the 1.5KE6.8HE3/73 suitable for automotive applications?
Yes, the 1.5KE6.8HE3/73 is AEC-Q101 qualified (as confirmed by the HE3 suffix and Vishay documentation), making it suitable for automotive powertrain and body electronics. Its –55 °C to +175 °C operating range, 200 A surge capability, and validated reliability under thermal cycling and humidity ensure compliance with automotive environmental stress requirements. Always confirm system-level testing aligns with ISO 7637-2 and ISO 16750-2.
How does the 1.5KE6.8HE3/73 differ from the 1.5KE6.8A-E3/54?
The 1.5KE6.8HE3/73 and 1.5KE6.8A-E3/54 share identical electrical parameters and DO-201AD packaging, but the HE3/73 variant is AEC-Q101 qualified while the E3/54 is commercial grade. The HE3 suffix also indicates compliance with JESD 201 Class 2 whisker testing. For automotive or high-reliability industrial use, the 1.5KE6.8HE3/73 is mandatory; for cost-driven commercial designs, the E3/54 suffices.
What is the maximum reverse leakage current for the 1.5KE6.8HE3/73 at its working voltage?
At its maximum stand-off voltage (VWM = 5.8 V), the 1.5KE6.8HE3/73 exhibits ≤1000 µA reverse leakage current at 25 °C. This value increases with temperature but remains within specification limits up to TJ = 175 °C. Low leakage ensures minimal standby power loss in always-on circuits such as automotive wake-up receivers or IoT sensor nodes.
Can the 1.5KE6.8HE3/73 be used in bidirectional configurations?
No - the 1.5KE6.8HE3/73 is a unidirectional TVS diode, as indicated by the absence of "CA" in its part number and its cathode-band marking. Bidirectional variants (e.g., 1.5KE6.8CA) exist in the same family but have different internal construction and symmetrical clamping. Using the 1.5KE6.8HE3/73 in bidirectional applications risks failure during negative transients; always select the CA-suffixed version for AC or dual-polarity rail protection.
1.5KE6.8HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.5V
- Voltage - Breakdown (Min):
- 6.12V
- Voltage - Clamping (Max) @ Ipp:
- 10.8V
- Current - Peak Pulse (10/1000µs):
- 139A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE6.8HE3/73 FAQ
1.How can I place an order for 1.5KE6.8HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE6.8HE3/73 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 1.5KE6.8HE3/73 reliable?
The price and inventory of 1.5KE6.8HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE6.8HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE6.8HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE6.8HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE6.8HE3/73?
1.5KE6.8HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE6.8HE3/73 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 1.5KE6.8HE3/73?
For technical support, including 1.5KE6.8HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE6.8HE3/73 requirements.
6.How does Aetrix verify that 1.5KE6.8HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE6.8HE3/73 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 1.5KE6.8HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE6.8HE3/73?
All 1.5KE6.8HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE6.8HE3/73, 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 1.5KE6.8HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE6.8HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE6.8HE3/73 Tags
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