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Vishay General Semiconductor - Diodes Division 1.5KA8.2AHE3/51
- Part No.:
- 1.5KA8.2AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA8.2AHE3/51.pdf
- Description:
- TVS DIODE 7.02VWM 12.1VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:5,290
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Product details
Overview
1.5KA8.2AHE3/51 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode designed for high-reliability inductive load switching protection. It features a 1500 W peak pulse power rating (10/1000 µs), 7.79–8.61 V breakdown voltage at 10 mA, 7.02 V stand-off voltage, 124 A peak pulse current, and clamps to ≤12.1 V at rated surge - deployed in automotive sensor signal lines and MOSFET gate protection.
For engineers reviewing the 1.5KA8.2AHE3/51 datasheet, 1.5KA8.2AHE3/51 pinout, 1.5KA8.2AHE3/51 application, or 1.5KA8.2AHE3/51 equivalent, key selection criteria include AEC-Q101 qualification, 185 °C max junction temperature, low clamping ratio (VC/VBR ≈ 1.45), RoHS-compliant HE3 packaging, and 1000 µA max reverse leakage at VWM.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable clamping under high-temperature transients and meets AEC-Q101 stress test requirements for automotive use. Its unidirectional polarity enables DC-biased line protection with fast response (<1 ns) and low incremental surge resistance.
The device operates across –65 °C to +185 °C junction range and delivers consistent 1500 W surge handling per 10/1000 µs waveform, with derating above 25 °C ambient per Fig. 2. Clamping voltage remains tightly controlled at 12.1 V (max) at 124 A IPPM, ensuring robust overvoltage margin for 12 V automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains single high-energy transients common in automotive load dump and inductive kick events |
| Breakdown Voltage VBR | 7.79–8.61 V at 10 mA - defines precise voltage threshold where avalanche conduction begins |
| Stand-off Voltage VWM | 7.02 V - maximum continuous reverse voltage before significant leakage; ensures no false triggering in 5–6 V logic interfaces |
| Clamping Voltage VC | ≤12.1 V at 124 A - limits downstream voltage stress during surge, protecting 12 V-rated ICs and MOSFETs |
| Max Reverse Leakage ID | 200 µA at VWM, TJ = 150 °C - low leakage preserves signal integrity and battery drain in always-on automotive modules |
| Junction Temperature Range | –65 °C to +185 °C - supports under-hood deployment and extended thermal cycling reliability |
| AEC-Q101 Qualified | Yes - validated for automotive grade reliability including HTSL, TCT, and HTRB testing |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body with matte tin-plated leads; UL 94 V-0 rated; lead length 0.375" (9.5 mm); diameter 0.210" (5.3 mm). Cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage rail; completes clamping path during reverse surge |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., sensor output); avalanche conduction initiates here during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR and low dynamic impedance across temperature and lifetime, critical for AEC-Q101 compliance |
| 1500 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b, and load-dump surges without degradation |
| HE3 suffix packaging | Meets JESD201 Class 2 whisker resistance and RoHS-compliant high-reliability automotive assembly standards |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes voltage overshoot on protected nodes, reducing risk of latch-up or oxide damage in downstream ICs |
| 185 °C max junction temperature | Supports placement near heat sources (e.g., ECUs, motor drivers) without thermal derating penalties |
Applications
| Automotive Sensor Protection | Powertrain Control Module Input Protection |
|---|---|
Use Scenario: Protecting analog outputs of pressure, temperature, and position sensors exposed to inductive switching noise in engine compartments. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient excursions to ≤12.1 V, preserving 12-bit ADC accuracy and preventing ESD-induced offset drift. | Use Scenario: Safeguarding digital inputs (e.g., crankshaft/camshaft position signals) in engine control units subject to alternator load dump. IC Role / Device Role / Timing Role: Standoff protection on 5 V CMOS-compatible signal lines interfacing with Hall-effect or VR sensors. Use Value: Maintains <200 µA leakage at 7.02 V, avoiding false triggering while clamping 124 A surges within 1 ns. |
| Body Control Module Power Line Protection | Infotainment System USB/UART Interface Protection |
Use Scenario: Suppressing transients on 12 V supply rails feeding BCM submodules (e.g., door lock actuators, lighting drivers). IC Role / Device Role / Timing Role: Primary surge suppression stage upstream of DC/DC converters and LDOs. Use Value: Absorbs 1500 W pulses without failure, enabling single-device protection instead of multi-stage RC+TVS designs. | Use Scenario: Shielding low-voltage UART or USB data lines connected to external diagnostic ports from cable discharge events. IC Role / Device Role / Timing Role: Bidirectional-capable interface protection using unidirectional 1.5KA8.2AHE3/51 in series with pull-up/pull-down biasing. Use Value: Leverages 7.02 V VWM to avoid interference with 3.3 V logic thresholds while delivering 12.1 V clamping during 8 kV contact ESD. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A-E3/52 | Lower PPPM (600 W), same VBR range (7.22–8.02 V), SMB package (smaller footprint, lower thermal mass) | Not AEC-Q101 qualified; suitable for industrial/commercial, not automotive under-hood | Select when space-constrained PCB layout prioritizes size over automotive qualification and surge energy handling |
| 1.5KE8.2A | Same 1500 W rating and VBR (7.79–8.61 V), but TO-204AA (DO-4) package; no HE3 whisker mitigation or AEC-Q101 validation | Lacks automotive reliability certification; higher thermal resistance due to non-molded metal case | Choose only for cost-sensitive non-automotive applications where JEDEC-standard packaging suffices |
Compared with SMBJ8.0A-E3/52 and 1.5KE8.2A, the 1.5KA8.2AHE3/51 uniquely combines AEC-Q101 qualification, PAR®-enhanced stability, HE3 whisker-resistant terminations, and 1.5KA case thermal performance - making it the sole option for production automotive signal-line protection requiring zero field return risk.
Availability
1.5KA8.2AHE3/51 is available at Aetrix Electronics and suitable for automotive sensor protection, powertrain control module input hardening, and body control module power rail stabilization requiring stable component supply and long-term lifecycle continuity.
Supply support for 1.5KA8.2AHE3/51 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, rectifiers, and protection devices for demanding environments.
The 1.5KA family was engineered specifically for automotive transient suppression under AEC-Q101 conditions, emphasizing thermal robustness, clamping consistency, and long-term surge endurance in under-hood and chassis-mounted systems.
FAQ
What is the AEC-Q101 qualification status of the 1.5KA8.2AHE3/51?
The 1.5KA8.2AHE3/51 is explicitly AEC-Q101 qualified per Document Number 88300, Revision 20-Oct-08. This includes full stress testing for high-temperature operating life (HTOL), temperature cycling (TCT), and highly accelerated stress testing (HAST), confirming suitability for automotive under-hood applications up to 185 °C junction temperature.
Does the 1.5KA8.2AHE3/51 support bidirectional transient suppression?
No - the 1.5KA8.2AHE3/51 is unidirectional only, as confirmed in the "FEATURES" section of its datasheet. It protects against reverse-polarity surges on positively referenced lines. For bidirectional protection, two 1.5KA8.2AHE3/51 devices must be used in series opposition, or a dedicated bidirectional TVS such as SMAJ8.0CA should be selected.
What is the maximum clamping voltage of the 1.5KA8.2AHE3/51 at its rated peak pulse current?
The 1.5KA8.2AHE3/51 clamps to a maximum of 12.1 V at its rated peak pulse current of 124 A (10/1000 µs waveform), as specified in the ELECTRICAL CHARACTERISTICS table on page 2 of Document Number 88300. This value is measured at TJ = 25 °C and defines the upper voltage limit imposed on protected circuitry during surge events.
How does the HE3 suffix impact the 1.5KA8.2AHE3/51's manufacturability and reliability?
HE3 denotes Vishay's high-reliability, RoHS-compliant automotive grade: matte tin-plated leads compliant with J-STD-002 and JESD22-B102, plus JESD201 Class 2 whisker resistance. This ensures solder joint integrity in high-vibration automotive assemblies and eliminates tin whisker risk in long-life modules - a requirement not met by standard commercial-grade variants.
Can the 1.5KA8.2AHE3/51 replace the 1.5KA8.2A in existing designs?
Yes - the 1.5KA8.2AHE3/51 is a direct replacement for 1.5KA8.2A, sharing identical electrical specifications, package outline, and pinout. The HE3/51 suffix indicates tape-and-reel packaging (51 = 7" reel, 54 = 13" reel) and enhanced automotive qualification; no PCB or schematic changes are required for drop-in substitution.
1.5KA8.2AHE3/51 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):
- 7.02V
- Voltage - Breakdown (Min):
- 7.79V
- Voltage - Clamping (Max) @ Ipp:
- 12.1V
- Current - Peak Pulse (10/1000µs):
- 124A
- 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
1.5KA8.2AHE3/51 FAQ
1.How can I place an order for 1.5KA8.2AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA8.2AHE3/51 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 1.5KA8.2AHE3/51 reliable?
The price and inventory of 1.5KA8.2AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA8.2AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA8.2AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA8.2AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA8.2AHE3/51?
1.5KA8.2AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA8.2AHE3/51 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 1.5KA8.2AHE3/51?
For technical support, including 1.5KA8.2AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA8.2AHE3/51 requirements.
6.How does Aetrix verify that 1.5KA8.2AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA8.2AHE3/51 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 1.5KA8.2AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA8.2AHE3/51?
All 1.5KA8.2AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA8.2AHE3/51, 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 1.5KA8.2AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA8.2AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA8.2AHE3/51 Tags
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