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Vishay General Semiconductor - Diodes Division 1.5KA6.8AHE3/51
- Part No.:
- 1.5KA6.8AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA6.8AHE3/51.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:6,858
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Product details
Overview
1.5KA6.8AHE3/51 from Vishay General Semiconductor is an AEC-Q101-qualified unidirectional transient voltage suppressor (TVS) diode designed for automotive and industrial overvoltage protection. It features a 6.45–7.14 V breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), 143 A peak pulse current (IPPM), 10.5 V clamping voltage at IPPM, and operates up to +185 °C junction temperature - deployed to protect MOSFETs and sensor signal lines against inductive switching transients.
For engineers reviewing the 1.5KA6.8AHE3/51 datasheet, 1.5KA6.8AHE3/51 pinout, 1.5KA6.8AHE3/51 application, or 1.5KA6.8AHE3/51 equivalent, key selection criteria include its AEC-Q101 qualification, low 0.057 %/°C VBR temperature coefficient, 10.5 V clamping performance at 143 A, RoHS-compliant HE3 packaging, and suitability for high-reliability 12 V automotive power rail and CAN bus node protection.
Technical Context
This TVS diode uses Vishay's patented PAR® construction for stable clamping under repetitive surge stress and exhibits very fast response time (<1 ns) due to its avalanche breakdown mechanism. Its unidirectional polarity enables integration into DC-biased circuits such as automotive power supplies and sensor interfaces without reverse conduction concerns.
The device delivers consistent 1500 W surge handling per 10/1000 µs waveform with low incremental surge resistance, enabling effective energy diversion away from downstream ICs. Its 185 °C maximum junction temperature and JESD201 Class 2 whisker-resistant matte tin plating support long-term reliability in under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V - Ensures reliable turn-on above 12 V system nominal while avoiding false triggering during load dump overshoot. |
| VC @ IPPM | 10.5 V - Clamps transients to safe levels for 5 V or 3.3 V logic interfaces downstream of protected nodes. |
| IPPM | 143 A - Sustains high-energy surges from ISO 7637-2 Pulse 1/2a/5a without degradation. |
| PPPM | 1500 W - Meets stringent automotive transient immunity requirements per SAE J1113-11. |
| TJ max. | +185 °C - Enables placement near hot components (e.g., power modules) without thermal derating penalties. |
| Temp. Coeff. VBR | 0.057 %/°C - Minimizes drift across engine bay temperature range (-40 to +150 °C ambient). |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body (UL 94 V-0), 0.375" (9.5 mm) lead length, axial-leaded DO-201AD outline with cathode band marking. Matte tin-plated leads meet J-STD-002 and JESD22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC return path for clamped surge current | Connected to ground or low-impedance return plane; carries full transient current during avalanche conduction. |
| Cathode | Protected line connection point | Connected to line being protected (e.g., battery rail or sensor output); color band identifies this terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR and low clamping variation over 1000+ surge events without parameter shift. |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock testing. |
| 1500 W peak pulse rating (10/1000 µs) | Withstands ISO 7637-2 Pulse 5a (load dump) up to 40 V, 100 ms duration with margin. |
| Low 0.057 %/°C VBR tempco | Maintains tight clamping window across full automotive operating temperature range (-40 to +150 °C). |
| RoHS-compliant HE3 suffix | Meets JESD201 Class 2 whisker resistance and supports lead-free reflow assembly at 260 °C for 40 s. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and jump-start transients per ISO 7637-2. 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: 10.5 V clamping at 143 A ensures downstream 5 V regulators remain within absolute maximum ratings during 100 V/100 ms load dump events. | Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and inductive kickback in factory automation systems. IC Role / Device Role / Timing Role: TVS mounted directly at sensor connector to shunt transients before entering signal conditioning circuitry. Use Value: Sub-1 ns response time and 10.5 V clamping prevent latch-up or gate oxide damage in precision op-amps and ADC front-ends. |
| Automotive CAN Bus Node Protection | Telecom Power Supply Input Protection |
Use Scenario: Safeguarding CAN transceivers on vehicle body control modules exposed to board-level ESD and alternator noise. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional 1.5KA6.8AHE3/51 placed on VCC supply line to transceiver. Use Value: 185 °C TJ max and AEC-Q101 qualification ensure uninterrupted operation in high-ambient zones like fuse boxes. | Use Scenario: Front-end surge suppression for AC/DC power supplies in telecom base station equipment. IC Role / Device Role / Timing Role: Primary TVS on DC input stage to absorb lightning-induced surges coupled via power distribution networks. Use Value: 1500 W rating and low incremental surge resistance enable robust handling of 10/1000 µs surges up to 6 kV (per IEC 61000-4-5 Level 4). |
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 600 W PPPM, SMB package (surface-mount), 10.5 V VC at 64.5 A IPPM | Targeted for space-constrained PCBs where through-hole mounting is impractical | Select when board area is limited and surge energy requirements are ≤600 W. |
| 1.5KE6.8A | Same 1500 W rating but non-AEC-Q101, TO-204AA (DO-41) package, higher 0.073 %/°C VBR tempco | General industrial use only; not qualified for automotive under-hood deployment | Select only for cost-sensitive non-automotive applications requiring identical electrical specs. |
Compared with SMBJ6.8AHE3/52 and 1.5KE6.8A, the 1.5KA6.8AHE3/51 uniquely combines AEC-Q101 qualification, DO-201AD mechanical robustness, and 1500 W capability in a single through-hole solution - making it the preferred choice for production automotive electronics where reliability and regulatory compliance are mandatory.
Availability
1.5KA6.8AHE3/51 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interface modules, and telecom power supply inputs requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for 1.5KA6.8AHE3/51 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, optoelectronics, and passive components for demanding industrial and automotive applications.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive environments - emphasizing thermal stability, surge endurance, and long-term parametric consistency under temperature cycling and humidity stress.
FAQ
What is the clamping voltage of the 1.5KA6.8AHE3/51 at its rated peak pulse current?
The 1.5KA6.8AHE3/51 has a maximum clamping voltage (VC) of 10.5 V when subjected to its rated peak pulse current (IPPM) of 143 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components see no more than 10.5 V during surge events - critical for protecting 5 V logic rails and automotive microcontrollers. The 1.5KA6.8AHE3/51 maintains this clamping performance across its full operating temperature range.
Is the 1.5KA6.8AHE3/51 suitable for automotive applications?
Yes, the 1.5KA6.8AHE3/51 is explicitly AEC-Q101 qualified and designated as high-reliability/automotive grade (base P/N HE3). It undergoes rigorous stress testing including temperature cycling, high-temperature operating life, and mechanical shock - all validated per automotive standards. Its +185 °C maximum junction temperature, low VBR temperature coefficient (0.057 %/°C), and JESD201 Class 2 whisker resistance make the 1.5KA6.8AHE3/51 appropriate for under-hood and powertrain applications.
What does the "HE3" suffix indicate on the 1.5KA6.8AHE3/51?
The "HE3" suffix on the 1.5KA6.8AHE3/51 denotes a RoHS-compliant, high-reliability variant meeting JESD201 Class 2 whisker resistance requirements and qualified for automotive use. It specifies matte tin-plated leads compatible with lead-free soldering (260 °C, 40 s), UL 94 V-0 molding compound, and full AEC-Q101 certification. The HE3 suffix distinguishes the 1.5KA6.8AHE3/51 from standard commercial-grade equivalents and confirms its suitability for mission-critical deployments.
How does the 1.5KA6.8AHE3/51 differ from the 1.5KA6.8 variant?
The 1.5KA6.8AHE3/51 offers tighter breakdown voltage tolerance (6.45–7.14 V) versus the broader 6.12–7.48 V range of the 1.5KA6.8, resulting in more predictable clamping behavior. It also features the HE3 suffix - confirming RoHS compliance, AEC-Q101 qualification, and JESD201 Class 2 whisker resistance - whereas the base 1.5KA6.8 lacks these automotive-specific validations. Both share the same 1500 W rating and DO-201AD package, but only the 1.5KA6.8AHE3/51 is approved for production automotive systems.
What is the maximum operating temperature for the 1.5KA6.8AHE3/51?
The 1.5KA6.8AHE3/51 has a maximum junction temperature (TJ) of +185 °C, verified per its AEC-Q101 qualification and documented in the Vishay datasheet (Document Number 88300). This allows reliable operation in high-ambient environments such as engine compartments or power inverters. The device's thermal design supports continuous power dissipation up to 6.5 W on an infinite heatsink at 75 °C lead temperature - a key specification for sustained surge readiness in the 1.5KA6.8AHE3/51.
1.5KA6.8AHE3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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 ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KA
1.5KA6.8AHE3/51 FAQ
1.How can I place an order for 1.5KA6.8AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA6.8AHE3/51 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 1.5KA6.8AHE3/51 reliable?
The price and inventory of 1.5KA6.8AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA6.8AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA6.8AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA6.8AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA6.8AHE3/51?
1.5KA6.8AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA6.8AHE3/51 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 1.5KA6.8AHE3/51?
For technical support, including 1.5KA6.8AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA6.8AHE3/51 requirements.
6.How does Aetrix verify that 1.5KA6.8AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA6.8AHE3/51 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 1.5KA6.8AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA6.8AHE3/51?
All 1.5KA6.8AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA6.8AHE3/51, 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 1.5KA6.8AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA6.8AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA6.8AHE3/51 Tags
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