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Vishay General Semiconductor - Diodes Division 1.5KA12HE3/51
- Part No.:
- 1.5KA12HE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA12HE3/51.pdf
- Description:
- TVS DIODE 9.72VWM 17.3VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:2,559
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Product details
Overview
1.5KA12HE3/51 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode with 1500 W peak pulse power (10/1000 µs), 10.8–13.2 V breakdown voltage, and AEC-Q101 qualification. It clamps transients to ≤17.3 V at 86.7 A, operates from –65 °C to +185 °C, and protects MOSFETs and sensor signal lines in automotive power electronics.
For engineers reviewing the 1.5KA12HE3/51 datasheet, 1.5KA12HE3/51 pinout, 1.5KA12HE3/51 application, or 1.5KA12HE3/51 equivalent, key selection criteria include its 17.3 V clamping voltage at rated surge current, 2.0 µA max reverse leakage at 9.72 V stand-off, RoHS-compliant HE3 packaging, and validated performance under high-temperature reliability stress per AEC-Q101.
Technical Context
This TVS diode uses patented PAR® construction for low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of inductive switching spikes and ESD events. Its unidirectional polarity and 10/1000 µs waveform-rated 1500 W capability target robust protection in 12 V automotive subsystems.
The device features a molded epoxy case meeting UL 94 V-0, matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and passes JESD201 Class 2 whisker testing-ensuring long-term solder joint integrity in high-reliability automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains high-energy transients without failure in automotive load-dump or inductive kick scenarios |
| Breakdown Voltage VBR | 10.8–13.2 V - ensures reliable triggering above normal 12 V rail while avoiding false clamping |
| Clamping Voltage VC at IPPM | 17.3 V - limits downstream voltage stress on protected ICs and MOSFETs during surge events |
| Stand-off Voltage VWM | 9.72 V - maintains low leakage (<2.0 µA) during nominal 12 V operation |
| Operating Temperature Range | –65 °C to +185 °C - supports under-hood deployment in extreme thermal environments |
| AEC-Q101 Qualified | Yes - certified for automotive electronic systems requiring zero-defect reliability and lifetime validation |
| RoHS & WEEE Compliant | Yes - meets EU environmental directives with HE3 suffix indicating high-reliability automotive grade |
Pinout & Package
Package: Case Style 1.5KA - axial-leaded, molded epoxy body (UL 94 V-0), 0.375" (9.5 mm) lead length, 0.210" (5.3 mm) body diameter. Cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to ground or low-side reference | Provides low-impedance path to ground during reverse-transient clamping; must be routed with minimal inductance |
| Cathode | Protected line connection; receives transient energy | Connected to the line being protected (e.g., 12 V supply rail or sensor signal); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables ultra-low dynamic impedance and consistent clamping across temperature and surge cycles |
| 1500 W peak pulse power (10/1000 µs) | Handles automotive load-dump surges (ISO 7637-2 Pulse 5a) without degradation |
| AEC-Q101 qualification | Validated for automotive use via accelerated life testing including HTOL, TC, and HAST |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in high-humidity, high-temperature under-hood applications |
| UL 94 V-0 flammability rating | Ensures flame-retardant encapsulation for safety-critical vehicle subsystems |
Applications
| Automotive Power Distribution | Engine Control Unit (ECU) Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed power rails against load-dump transients (up to 35 V, 400 ms) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery input and DC/DC converter input stage. Use Value: Limits voltage to ≤17.3 V during 86.7 A surge, preventing overvoltage damage to downstream regulators and microcontrollers. | Use Scenario: Safeguarding low-voltage sensor interfaces (e.g., crankshaft position, MAP) from inductive switching noise. IC Role / Device Role / Timing Role: Transient suppressor on 5 V or 3.3 V sensor supply lines adjacent to microcontroller GPIOs. Use Value: Clamps sub-100 ns ESD events to safe levels while maintaining <2.0 µA leakage at 9.72 V stand-off for signal integrity. |
| Body Control Module (BCM) | ADAS Camera Power Input |
Use Scenario: Shielding LIN bus power inputs and relay driver outputs from inductive kickback in door module actuators. IC Role / Device Role / Timing Role: TVS placed at BCM power entry point and across relay coil terminals. Use Value: Withstands repeated 200 A surge pulses (8.3 ms half-sine) without parameter shift, ensuring 15+ year field reliability. | Use Scenario: Protecting 12 V camera module inputs from ignition transients and hot-swap surges in rear-view systems. IC Role / Device Role / Timing Role: Primary clamping device upstream of buck converter feeding image sensor and ISP. Use Value: Maintains stable clamping performance up to +185 °C junction temperature-critical for sealed, passive-cooled camera housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | 600 W peak power (10/1000 µs), 13.3 V min VBR, SMC package | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and 1500 W surge margin is unnecessary |
| 1.5KE12A | Same 1500 W rating but TO-204AA (DO-41) package; no HE3 suffix or AEC-Q101 certification | Not validated for automotive temperature cycling or humidity exposure per AEC standards | Choose only for industrial or consumer applications where extended temperature range and whisker resistance are non-critical |
Compared with SMBJ12A and 1.5KE12A, the 1.5KA12HE3/51 delivers higher surge robustness in the same axial form factor, guaranteed AEC-Q101 compliance, and design assurance for under-hood deployment-making it the sole option when automotive qualification and 185 °C operation are mandatory.
Availability
1.5KA12HE3/51 is available at Aetrix Electronics and suitable for automotive power distribution, engine control unit (ECU) protection, and body control module (BCM) designs requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KA12HE3/51 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5KA series was engineered specifically for automotive transient suppression, combining high-temperature stability, AEC-Q101 validation, and PAR® technology to meet stringent ISO 7637-2 and ISO 16750-2 requirements.
FAQ
What is the clamping voltage of the 1.5KA12HE3/51 at its rated peak pulse current?
The 1.5KA12HE3/51 has a maximum clamping voltage (VC) of 17.3 V at its rated peak pulse current (IPPM) of 86.7 A, measured using a 10/1000 µs waveform. This value ensures protected components remain within safe operating voltage limits during standardized automotive surge events such as ISO 7637-2 Pulse 1 and Pulse 5a. The 1.5KA12HE3/51 achieves this clamping performance while maintaining low dynamic impedance due to its PAR® construction.
Is the 1.5KA12HE3/51 qualified for automotive applications?
Yes, the 1.5KA12HE3/51 is AEC-Q101 qualified and designated as high-reliability automotive grade (base P/N HE3). It undergoes rigorous stress testing-including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing-to validate performance across –65 °C to +185 °C. The 1.5KA12HE3/51 also meets JESD201 Class 2 whisker resistance and RoHS/WEEE directives, confirming its suitability for safety-critical automotive subsystems.
What does the HE3 suffix indicate on the 1.5KA12HE3/51?
The HE3 suffix on the 1.5KA12HE3/51 denotes RoHS-compliant, high-reliability automotive grade construction. It specifies matte tin-plated leads compliant with J-STD-002 and JESD22-B102, UL 94 V-0 molding compound, and successful completion of JESD201 Class 2 whisker testing. Unlike standard commercial variants, the 1.5KA12HE3/51 carries full AEC-Q101 qualification and is intended for mission-critical automotive deployments where long-term solder joint integrity and thermal stability are essential.
What is the maximum reverse leakage current of the 1.5KA12HE3/51 at its stand-off voltage?
At its stand-off voltage (VWM) of 9.72 V and ambient temperature of 25 °C, the 1.5KA12HE3/51 exhibits a maximum reverse leakage current (ID) of 2.0 µA. At elevated junction temperature (TJ = 150 °C), leakage increases to 10 µA-still well within design margins for protecting low-power sensor interfaces and logic circuits. This low leakage preserves system efficiency and avoids false triggering in always-on automotive modules.
How does the 1.5KA12HE3/51 differ from the 1.5KA12A variant?
The 1.5KA12HE3/51 and 1.5KA12A share identical electrical characteristics-including breakdown voltage (11.4–12.6 V), clamping voltage (16.7 V), and peak pulse power (1500 W)-but differ in qualification and construction. The 1.5KA12HE3/51 carries the HE3 suffix, confirming AEC-Q101 qualification, JESD201 Class 2 whisker resistance, and RoHS compliance. The 1.5KA12A lacks these certifications and is intended for industrial or commercial use only. Both use Case Style 1.5KA packaging.
1.5KA12HE3/51 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):
- 9.72V
- Voltage - Breakdown (Min):
- 10.8V
- Voltage - Clamping (Max) @ Ipp:
- 17.3V
- Current - Peak Pulse (10/1000µs):
- 86.7A
- 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
1.5KA12HE3/51 FAQ
1.How can I place an order for 1.5KA12HE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA12HE3/51 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 1.5KA12HE3/51 reliable?
The price and inventory of 1.5KA12HE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA12HE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA12HE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA12HE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA12HE3/51?
1.5KA12HE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA12HE3/51 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 1.5KA12HE3/51?
For technical support, including 1.5KA12HE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA12HE3/51 requirements.
6.How does Aetrix verify that 1.5KA12HE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA12HE3/51 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 1.5KA12HE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA12HE3/51?
All 1.5KA12HE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA12HE3/51, 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 1.5KA12HE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA12HE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA12HE3/51 Tags
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