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Vishay General Semiconductor - Diodes Division 1.5KA9.1AHE3/73
- Part No.:
- 1.5KA9.1AHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA9.1AHE3/73.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:8,583
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Product details
Overview
1.5KA9.1AHE3/73 from Vishay General Semiconductor is an automotive-grade unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in harsh environments. It features a 1500 W peak pulse power rating (10/1000 µs), 9.55 V maximum breakdown voltage, 7.78 V stand-off voltage, and AEC Q101 qualification for use in engine control units and sensor interfaces.
For engineers reviewing the 1.5KA9.1AHE3/73 datasheet, 1.5KA9.1AHE3/73 pinout, 1.5KA9.1AHE3/73 application, or 1.5KA9.1AHE3/73 equivalent, this page delivers verified electrical parameters, thermal limits, clamping behavior under surge conditions, and automotive reliability validation per JESD201 Class 2 whisker testing and RoHS compliance.
Technical Context
The 1.5KA9.1AHE3/73 employs patented PAR® construction to achieve low incremental surge resistance and fast response time (<1 ns), enabling effective suppression of inductive switching transients and ESD events. Its unidirectional polarity and 13.4 V maximum clamping voltage at 112 A IPPM ensure predictable overvoltage limiting during 10/1000 µs surges.
Rated for operation from −65 °C to +185 °C junction temperature, it supports high-temperature stability in under-hood automotive applications. The device is qualified to AEC Q101, with matte tin-plated leads compliant to J-STD-002 and JESD22-B102 solderability standards.
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 scenarios |
| Breakdown Voltage (VBR) | 8.65–9.55 V - defines precise voltage threshold where avalanche conduction begins |
| Stand-off Voltage (VWM) | 7.78 V - maximum continuous reverse voltage before leakage exceeds 50 µA |
| Clamping Voltage (VC) | 13.4 V at 112 A - limits protected circuit voltage during full-rated surge current |
| Junction Temperature Range | −65 °C to +185 °C - enables deployment in extreme under-hood or industrial environments |
| Surge Current (IPPM) | 112 A - peak current handled with 10/1000 µs waveform without degradation |
| Leakage Current (ID) | 50 µA at VWM, TJ = 150 °C - ensures minimal standby power loss in hot operating conditions |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body with UL 94 V-0 flammability rating; cathode indicated by color band; matte tin-plated leads; 0.375" (9.5 mm) lead length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to ground or low-side reference | Enables unidirectional clamping from cathode to anode during reverse surge events |
| Cathode | Protected line connection; voltage sensing node | Connected to signal/power line requiring transient suppression; color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Reduces incremental surge resistance for tighter clamping and lower let-through voltage |
| AEC Q101 qualification | Validates reliability for automotive electronics including powertrain and ADAS sensor interfaces |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling, ensuring long-term solder joint integrity |
| 1500 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 Pulse 5a load-dump surges without parametric shift or failure |
| RoHS-compliant & UL 94 V-0 molding | Meets environmental compliance and fire-safety requirements for automotive and industrial assemblies |
Applications
| Engine Control Unit (ECU) Power Input Protection | Automotive Sensor Signal Line Protection |
|---|---|
Use Scenario: Protects 12 V supply rail of engine control modules against ISO 7637-2 load-dump transients up to 60 V. IC Role / Device Role / Timing Role: TVS diode placed between battery feed and input filter capacitor to clamp surges before reaching LDOs and microcontrollers. Use Value: Clamps to 13.4 V at 112 A, preventing overvoltage damage to downstream 5 V/3.3 V logic while maintaining AEC Q101 reliability. | Use Scenario: Shields analog output lines of pressure or temperature sensors from inductive kickback in chassis-mounted modules. IC Role / Device Role / Timing Role: Unidirectional TVS connected across signal and ground to absorb sub-µs transients induced by nearby solenoid actuation. Use Value: 7.78 V stand-off allows normal 5 V sensor output; 13.4 V clamping prevents ADC saturation or op-amp latch-up. |
| Body Control Module (BCM) LIN Bus Protection | Industrial Motor Drive Gate Driver Supply Protection |
Use Scenario: Safeguards LIN transceiver I/O pins against ESD and cable discharge events in door module networks. IC Role / Device Role / Timing Role: TVS placed directly at connector interface, with cathode tied to LIN bus and anode to ground. Use Value: Sub-1 ns response time and 50 µA leakage at 7.78 V preserve bus signal integrity and low-power sleep mode current budgets. | Use Scenario: Protects isolated DC-DC converter output feeding high-side gate drivers in 48 V motor inverters. IC Role / Device Role / Timing Role: TVS mounted at driver supply input to suppress MOSFET switching-induced ringing and cross-talk. Use Value: 185 °C max junction temperature rating supports operation near heatsinks; 1500 W rating handles repetitive switching surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | 600 W peak power, 9.0 V nominal VBR, SMB package (smaller footprint, lower thermal mass) | Lower surge handling; suitable for non-automotive consumer or telecom interfaces | Select when space-constrained layout and lower energy transients are acceptable |
| 1.5KE9.1A | Same 1.5 kW rating and 9.1 V VBR range, but TO-204AA (DO-4) package and no AEC Q101 qualification | Lacks automotive reliability validation; not rated for 185 °C operation | Choose only for cost-sensitive industrial applications where extended temperature and qualification are not required |
Compared with SMBJ9.0A and 1.5KE9.1A, the 1.5KA9.1AHE3/73 uniquely combines AEC Q101 qualification, 185 °C operation, and JESD201 Class 2 whisker resistance-making it the only option validated for under-hood automotive power and signal protection where long-term reliability is non-negotiable.
Availability
1.5KA9.1AHE3/73 is available at Aetrix Electronics and suitable for automotive engine control units, sensor interface modules, body control systems, and industrial motor drive protection requiring stable component supply and long-lifecycle support.
Supply support for 1.5KA9.1AHE3/73 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The 1.5KA series is engineered specifically for automotive-grade transient suppression, delivering high-temperature stability, AEC Q101 qualification, and robust surge immunity in demanding vehicle subsystems.
FAQ
What is the maximum clamping voltage of the 1.5KA9.1AHE3/73 under full-rated surge current?
The 1.5KA9.1AHE3/73 has a maximum clamping voltage (VC) of 13.4 V when subjected to its rated peak pulse current of 112 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting during standardized surge events, making it suitable for protecting 5 V and 12 V automotive electronics without overstressing downstream ICs.
Is the 1.5KA9.1AHE3/73 qualified for automotive applications?
Yes, the 1.5KA9.1AHE3/73 is explicitly AEC Q101 qualified and designated as high-reliability automotive grade (Base P/N HE3). It meets JESD201 Class 2 whisker resistance, operates up to +185 °C junction temperature, and is constructed with RoHS-compliant materials-fully satisfying requirements for engine control, sensor, and body electronics in modern vehicles.
What does the "HE3" suffix indicate in 1.5KA9.1AHE3/73?
The "HE3" suffix in 1.5KA9.1AHE3/73 denotes a RoHS-compliant, high-reliability variant qualified to AEC Q101 and tested to JESD201 Class 2 for tin whisker resistance. It also indicates matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards-critical for automotive manufacturing and long-term field reliability.
How does the 1.5KA9.1AHE3/73 differ from the standard 1.5KA9.1A part?
The 1.5KA9.1AHE3/73 adds the HE3 qualification-specifically AEC Q101 certification, JESD201 Class 2 whisker resistance, and enhanced process controls-beyond the base 1.5KA9.1A's electrical specs. Both share identical VBR, VC, and PPPM ratings, but only the HE3 version is approved for automotive safety-critical and high-temperature deployments.
What is the stand-off voltage (VWM) and why is it important for the 1.5KA9.1AHE3/73?
The 1.5KA9.1AHE3/73 has a stand-off voltage (VWM) of 7.78 V, meaning it remains in high-impedance state below this reverse voltage-allowing normal circuit operation without leakage or loading. This parameter ensures compatibility with 5 V or 12 V systems where the protected line must operate reliably without false triggering, while still providing robust clamping above the breakdown threshold.
1.5KA9.1AHE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 112A
- 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
1.5KA9.1AHE3/73 FAQ
1.How can I place an order for 1.5KA9.1AHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA9.1AHE3/73 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 1.5KA9.1AHE3/73 reliable?
The price and inventory of 1.5KA9.1AHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA9.1AHE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KA9.1AHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA9.1AHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA9.1AHE3/73?
1.5KA9.1AHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA9.1AHE3/73 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 1.5KA9.1AHE3/73?
For technical support, including 1.5KA9.1AHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA9.1AHE3/73 requirements.
6.How does Aetrix verify that 1.5KA9.1AHE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KA9.1AHE3/73 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 1.5KA9.1AHE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KA9.1AHE3/73?
All 1.5KA9.1AHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA9.1AHE3/73, 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 1.5KA9.1AHE3/73 part is unused and in its original packaging.
Return procedure for 1.5KA9.1AHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA9.1AHE3/73 Tags
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