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Vishay General Semiconductor - Diodes Division 1.5KA6.8HE3/54
- Part No.:
- 1.5KA6.8HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA6.8HE3/54.pdf
- Description:
- TVS DIODE 5.5VWM 10.8VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:5,661
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Product details
Overview
1.5KA6.8HE3/54 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in harsh environments. It delivers 1500 W peak pulse power (10/1000 µs), clamps at ≤10.8 V under 139 A surge, and features a 6.12–7.48 V breakdown voltage at 10 mA, with AEC-Q101 qualification and 185 °C max junction temperature. It protects MOSFETs and sensor signal lines in automotive powertrain control units.
For engineers reviewing the 1.5KA6.8HE3/54 datasheet, 1.5KA6.8HE3/54 pinout, 1.5KA6.8HE3/54 application, or 1.5KA6.8HE3/54 equivalent, key selection criteria include clamping voltage at rated IPPM, VBR tolerance, TJ max derating behavior, RoHS-compliant HE3 suffix whisker resistance, and unidirectional polarity confirmation for DC-biased rail protection.
Technical Context
This TVS operates as a voltage-clamped shunt protector triggered by reverse-biased avalanche breakdown. Its patented PAR® construction enables low incremental surge resistance (≤0.078 Ω typical) and fast response (<1 ns), ensuring effective suppression of inductive switching transients and ESD events per IEC 61000-4-2/4-4.
Rated for 185 °C operation and qualified to AEC-Q101, it supports high-reliability automotive applications where thermal stability and long-term surge endurance are critical-particularly in 12 V and 24 V systems with repetitive load-dump or jump-start stress profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.12 V / 7.48 V at 10 mA - defines precise avalanche initiation threshold for predictable clamping onset |
| VC @ IPPM | 10.8 V at 139 A - maximum clamped voltage during 1500 W transient, limiting downstream IC stress |
| PPPM | 1500 W (10/1000 µs) - sustains high-energy surges without failure in automotive load-dump scenarios |
| IFSM | 200 A (8.3 ms half-sine) - handles short-duration forward surge currents during fault conditions |
| TJ max | +185 °C - enables placement near hot components (e.g., power modules) without thermal derating loss |
| VWM | 5.50 V - maximum continuous reverse working voltage, ensuring no leakage conduction in 5 V logic rails |
| Package | Case Style 1.5KA - axial-leaded, epoxy-molded package with UL 94 V-0 rating and matte tin leads |
Pinout & Package
Case Style 1.5KA is an axial-leaded, molded epoxy package with cathode indicated by a color band. Leads are matte tin-plated and solderable per J-STD-002/JESD22-B102; HE3 suffix confirms JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-impedance path during clamping | Connected to protected circuit ground or low-side return; must handle 200 A surge without bond-wire fusing |
| Cathode | Avalanche breakdown node / high-side connection point | Connected to protected line (e.g., battery rail); color band identifies this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables uniform current distribution across junction area, reducing localized thermal runaway during multi-pulse stress |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock per stress test plan |
| 1500 W peak pulse power | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V systems without external heat sinking |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot during transients, protecting 6 V-tolerant interface ICs and microcontrollers |
| HE3 suffix reliability | Guarantees JESD201 Class 2 tin whisker mitigation-critical for long-life automotive modules (>15 years) |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Camera Sensor Signal Line |
|---|---|
Use Scenario: Protects 12 V supply input of engine control units against ISO 7637-2 Pulse 5a load dump transients up to 60 V. IC Role / Device Role / Timing Role: Shunt TVS diode placed between battery rail and local bulk capacitor, clamping within 1 ns to limit voltage seen by PMIC and MCU. Use Value: With 10.8 V clamping at 139 A, prevents overvoltage damage to 16 V-rated input stages while surviving >1000 pulses per AEC-Q101 life test. | Use Scenario: Safeguards LVDS or analog video signal lines from ESD and cable discharge events in rear-view camera modules. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-signal, suppressing ±8 kV contact ESD per IEC 61000-4-2 without signal distortion. Use Value: Junction capacitance <100 pF at VWM ensures minimal signal integrity impact on 10–30 MHz video bandwidths. |
| Body Control Module (BCM) LIN Bus Line | Start-Stop System Battery Monitoring Circuit |
Use Scenario: Shields LIN transceiver I/O pins from coupled transients induced by relay switching in door module actuators. IC Role / Device Role / Timing Role: Low-leakage (≤1000 µA at 5.5 V) unidirectional TVS placed directly at connector interface, minimizing stub length. Use Value: VWM = 5.50 V allows safe operation on 5 V LIN bus without false triggering, while 10.8 V clamping protects transceiver ESD structures. | Use Scenario: Protects precision shunt-based battery current sensing circuitry from jump-start voltage spikes up to 28 V. IC Role / Device Role / Timing Role: High-temperature-stable TVS mounted adjacent to sense resistor, clamping surges before they reach op-amp inputs. Use Value: 185 °C TJ max enables direct mounting on current-sense PCBs near battery terminals, eliminating remote placement compromises. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8AHE3/52 | Lower PPPM (600 W), smaller SMB package, bidirectional option available | Not AEC-Q101 qualified; suitable for non-automotive industrial use only | Select when space-constrained layouts require SMT and full automotive qualification is not required |
| 1.5KE6.8A | Same 1500 W rating but legacy DO-201 package; no HE3 whisker mitigation or AEC-Q101 validation | Lacks automotive reliability assurance; higher thermal resistance due to older leadframe design | Acceptable for cost-sensitive consumer applications where long-term whisker risk and 15-year life are not critical |
Compared with 1.5KA6.8HE3/54, SMBJ6.8AHE3/52 trades peak power and automotive qualification for board space savings, while 1.5KE6.8A retains power capability but omits modern reliability features-making 1.5KA6.8HE3/54 the sole choice for AEC-Q101-compliant, high-surge, high-temperature deployments.
Availability
1.5KA6.8HE3/54 is available at Aetrix Electronics and suitable for automotive powertrain control, ADAS camera protection, body electronics surge hardening, and start-stop system monitoring requiring stable component supply across extended product lifecycles.
Supply support for 1.5KA6.8HE3/54 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 high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in automotive electrical systems-emphasizing thermal resilience, surge endurance, and long-term whisker-free performance under under-hood conditions.
FAQ
What is the clamping voltage of the 1.5KA6.8HE3/54 under maximum rated surge current?
The 1.5KA6.8HE3/54 exhibits a maximum clamping voltage (VC) of 10.8 V when subjected to its peak pulse current (IPPM) of 139 A using the standard 10/1000 µs waveform. This value is measured at TA = 25 °C and represents the upper limit of voltage imposed on the protected circuit during worst-case transient events, ensuring compatibility with 12 V system components rated for ≤16 V absolute maximum.
Is the 1.5KA6.8HE3/54 suitable for bidirectional signal line protection?
No, the 1.5KA6.8HE3/54 is unidirectional only, as explicitly stated in the Vishay datasheet Document Number 88300. It conducts in reverse avalanche mode to clamp positive transients on DC-biased lines but does not protect against negative-going surges. For bidirectional protection-such as AC-coupled or floating data lines-a different device like the 1.5KE6.8CA or SMBJ6.8CA must be selected.
Does the HE3 suffix on 1.5KA6.8HE3/54 indicate RoHS compliance and what additional reliability benefit does it provide?
Yes, the HE3 suffix confirms RoHS compliance (2002/95/EC) and denotes high-reliability automotive grade with AEC-Q101 qualification. Crucially, HE3 also certifies compliance with JESD201 Class 2 for tin whisker mitigation-ensuring long-term structural integrity of matte tin leads under thermal cycling and storage, a mandatory requirement for automotive modules deployed for 15+ years.
What is the maximum operating junction temperature for the 1.5KA6.8HE3/54 and how does it affect layout design?
The 1.5KA6.8HE3/54 has a maximum junction temperature (TJ) of +185 °C, significantly exceeding standard industrial limits. This allows placement in thermally demanding locations-such as near power relays or battery connections-without forced air or heatsinking. Layouts may minimize copper pour isolation, and thermal vias are optional unless ambient exceeds 125 °C, simplifying mechanical integration in compact ECUs.
How does the 1.5KA6.8HE3/54 compare to the 1.5KA6.8A variant in terms of electrical parameters?
The 1.5KA6.8HE3/54 and 1.5KA6.8A share identical VBR (6.12–7.48 V), VC (10.8 V), and PPPM (1500 W) specifications. The distinction lies in packaging and qualification: 1.5KA6.8HE3/54 uses the HE3 suffix denoting AEC-Q101 qualification and JESD201 Class 2 whisker resistance, whereas 1.5KA6.8A lacks these automotive-specific validations and is intended for less demanding applications.
1.5KA6.8HE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- 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:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KA
1.5KA6.8HE3/54 FAQ
1.How can I place an order for 1.5KA6.8HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA6.8HE3/54 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 1.5KA6.8HE3/54 reliable?
The price and inventory of 1.5KA6.8HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA6.8HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KA6.8HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA6.8HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA6.8HE3/54?
1.5KA6.8HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA6.8HE3/54 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 1.5KA6.8HE3/54?
For technical support, including 1.5KA6.8HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA6.8HE3/54 requirements.
6.How does Aetrix verify that 1.5KA6.8HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KA6.8HE3/54 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 1.5KA6.8HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KA6.8HE3/54?
All 1.5KA6.8HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA6.8HE3/54, 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 1.5KA6.8HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KA6.8HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA6.8HE3/54 Tags
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