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Vishay General Semiconductor - Diodes Division 1.5KA8.2HE3/51
- Part No.:
- 1.5KA8.2HE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA8.2HE3/51.pdf
- Description:
- TVS DIODE 6.63VWM 12.5VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:2,590
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Product details
Overview
1.5KA8.2HE3/51 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 1500 W peak pulse power rating (10/1000 µs), 7.38–9.02 V breakdown voltage at 10 mA, 12.5 V maximum clamping voltage at 120 A, and AEC-Q101 qualification for under-hood automotive electronics.
For engineers reviewing the 1.5KA8.2HE3/51 datasheet, 1.5KA8.2HE3/51 pinout, 1.5KA8.2HE3/51 application, or 1.5KA8.2HE3/51 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge, RoHS-compliant packaging, and direct alternatives for automotive ESD/surge protection design.
Technical Context
The 1.5KA8.2HE3/51 uses patented PAR® construction to achieve low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of inductive switching transients and ISO 7637-2 pulses. Its unidirectional polarity and 185 °C max junction temperature support operation in high-temperature engine bay environments.
It operates with a 6.63 V stand-off voltage and exhibits only 200 µA max reverse leakage at VWM, ensuring minimal standby current draw in always-on vehicle systems. The device is rated for 200 A non-repetitive forward surge (8.3 ms half-sine) and maintains stable VBR temperature coefficient of +0.065 %/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains automotive load-dump surges without failure |
| Breakdown Voltage VBR | 7.38–9.02 V at 10 mA - defines precise overvoltage triggering threshold |
| Clamping Voltage VC | 12.5 V at 120 A - limits protected circuit voltage during full-rated surge |
| Stand-off Voltage VWM | 6.63 V - ensures reliable blocking below system operating voltage |
| Max Reverse Leakage ID | 200 µA at VWM, TJ = 25 °C - minimizes quiescent power loss |
| Junction Temp Range | −65 to +185 °C - qualified for under-hood placement per AEC-Q101 |
| Temp Coefficient of VBR | +0.065 %/°C - enables predictable voltage shift across temperature |
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 indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to ground or low-side return path in unidirectional TVS configuration |
| Cathode | Current exit point in forward bias; high-impedance terminal in reverse bias until VBR | Connected to protected line (e.g., 12 V rail or sensor signal) - clamps to VC when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables uniform current distribution and low dynamic impedance during surge, improving clamping consistency |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| 1500 W peak pulse power | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 12 V systems |
| Solder dip 260 °C, 40 s | Supports standard lead-free reflow and wave soldering processes without degradation |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in long-life automotive applications |
Applications
| Automotive Power Rail Protection | Engine Control Unit (ECU) Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp surges above 12.5 V. Use Value: Prevents latch-up or permanent damage to PMICs and MCUs during ISO 7637-2 Pulse 5a events. | Use Scenario: Safeguarding analog sensor inputs (e.g., MAP, TPS) from inductive kickback in throttle actuation circuits. IC Role / Device Role / Timing Role: TVS connected across sensor signal and ground to shunt transients before reaching ADC input stage. Use Value: Maintains signal integrity and avoids false readings caused by >100 V spikes induced by solenoid switching. |
| Body Control Module (BCM) LIN Bus Protection | Automotive Lighting Driver Output Protection |
Use Scenario: Shielding LIN transceiver pins from ESD and board-level coupling noise in door module designs. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on LIN data line referenced to local ground. Use Value: Preserves <1 Mbps LIN timing margins while suppressing ±30 kV contact ESD per IEC 61000-4-2. | Use Scenario: Protecting high-side LED driver outputs from back-EMF generated during PWM dimming of headlamp arrays. IC Role / Device Role / Timing Role: TVS placed between driver output and chassis ground to absorb inductive energy from LED string inductance. Use Value: Extends MOSFET lifetime by limiting drain-source voltage overshoot to ≤12.5 V during turn-off. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0AHE3/52 | 600 W PPPM rating; 8.0 V nominal VBR; SMB package (smaller footprint, lower thermal mass) | Lower surge capacity; suited for non-load-dump sub-systems (e.g., infotainment USB ports) | Select when space-constrained layout and <600 W surge immunity suffice |
| 1.5KE8.2A | Same VBR range and 1500 W rating but TO-204AA (DO-4) package; no AEC-Q101 qualification | Lacks automotive reliability validation; not recommended for safety-critical or under-hood use | Acceptable for industrial control panels where AEC-Q101 is not mandated |
Compared with 1.5KA8.2HE3/51, the SMBJ8.0AHE3/52 offers compactness at reduced surge robustness, while the 1.5KE8.2A matches power handling but lacks automotive qualification-making the 1.5KA8.2HE3/51 the sole choice for AEC-Q101-compliant 12 V rail protection requiring 1500 W clamping.
Availability
1.5KA8.2HE3/51 is available at Aetrix Electronics and suitable for automotive power rail protection, ECU signal line safeguarding, and body control module transient suppression requiring stable component supply across production lifecycles.
Supply support for 1.5KA8.2HE3/51 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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability and automotive qualification.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive environments-targeting load dump, ISO 16750-2, and ESD immunity in 12 V and 24 V systems.
FAQ
What is the clamping voltage of the 1.5KA8.2HE3/51 at its rated peak pulse current?
The 1.5KA8.2HE3/51 has a maximum clamping voltage (VC) of 12.5 V at 120 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry sees no more than 12.5 V during a full-rated surge event. The 1.5KA8.2HE3/51 achieves this with low dynamic impedance enabled by its PAR® construction.
Is the 1.5KA8.2HE3/51 suitable for bidirectional transient protection?
No, the 1.5KA8.2HE3/51 is unidirectional only, as confirmed in the Vishay datasheet Document Number 88300. It must be used with cathode toward the protected line and anode to ground. For bidirectional protection (e.g., AC lines or differential buses), a separate symmetric device such as the 1.5SMC8.2CAHE3 is required-not the 1.5KA8.2HE3/51.
Does the 1.5KA8.2HE3/51 meet AEC-Q101 requirements?
Yes, the 1.5KA8.2HE3/51 is explicitly AEC-Q101 qualified, as stated in the "Mechanical Data" section of the Vishay datasheet (Rev. 20-Oct-08). The HE3 suffix denotes RoHS compliance and high-reliability automotive grade, and qualification includes temperature cycling, humidity testing, and mechanical shock per AEC-Q101 standards. This makes the 1.5KA8.2HE3/51 appropriate for under-hood deployment.
What is the maximum reverse leakage current for the 1.5KA8.2HE3/51 at room temperature?
The 1.5KA8.2HE3/51 exhibits a maximum reverse leakage current (ID) of 200 µA at its stand-off voltage (VWM = 6.63 V) and TA = 25 °C. At elevated temperatures (TJ = 150 °C), leakage rises to 2000 µA-still within specification. This low leakage ensures minimal impact on battery drain in always-on automotive modules using the 1.5KA8.2HE3/51.
Can the 1.5KA8.2HE3/51 be used in 24 V automotive systems?
The 1.5KA8.2HE3/51 is rated for 12 V nominal systems: its 6.63 V stand-off voltage and 12.5 V clamping are optimized for protecting 12 V rails and signals. While it may survive brief exposure in 24 V contexts, its VWM is too low for reliable blocking-risking premature conduction and thermal runaway. For 24 V systems, Vishay recommends higher-voltage variants like 1.5KA24HE3/51-not the 1.5KA8.2HE3/51.
1.5KA8.2HE3/51 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):
- 6.63V
- Voltage - Breakdown (Min):
- 7.38V
- Voltage - Clamping (Max) @ Ipp:
- 12.5V
- Current - Peak Pulse (10/1000µs):
- 120A
- 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
1.5KA8.2HE3/51 FAQ
1.How can I place an order for 1.5KA8.2HE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA8.2HE3/51 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 1.5KA8.2HE3/51 reliable?
The price and inventory of 1.5KA8.2HE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA8.2HE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA8.2HE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA8.2HE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA8.2HE3/51?
1.5KA8.2HE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA8.2HE3/51 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 1.5KA8.2HE3/51?
For technical support, including 1.5KA8.2HE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA8.2HE3/51 requirements.
6.How does Aetrix verify that 1.5KA8.2HE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA8.2HE3/51 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 1.5KA8.2HE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA8.2HE3/51?
All 1.5KA8.2HE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA8.2HE3/51, 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 1.5KA8.2HE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA8.2HE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA8.2HE3/51 Tags
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