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Vishay General Semiconductor - Diodes Division 1.5KA9.1AHE3/54
- Part No.:
- 1.5KA9.1AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA9.1AHE3/54.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:8,088
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Product details
Overview
1.5KA9.1AHE3/54 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 delivers 1500 W peak pulse power (10/1000 µs), clamps at 13.4 V under 112 A surge current, and operates up to +185 °C junction temperature. It is AEC-Q101 qualified and used to protect MOSFETs and sensor signal lines in automotive engine control units.
For engineers reviewing the 1.5KA9.1AHE3/54 datasheet, 1.5KA9.1AHE3/54 pinout, 1.5KA9.1AHE3/54 application, or 1.5KA9.1AHE3/54 equivalent, key selection criteria include breakdown voltage tolerance (8.65–9.55 V), clamping performance at rated IPPM, thermal derating above 25 °C, and RoHS-compliant HE3 packaging for high-reliability automotive assembly.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable clamping under repetitive surge stress and exhibits low incremental surge resistance to minimize voltage overshoot during fast transients. Its unidirectional polarity and 1.0 mA test current ensure precise standoff voltage (7.78 V) with only 50 µA leakage at TJ = 150 °C.
The device is optimized for 10/1000 µs waveform compliance per ANSI/IEEE C62.35 and supports soldering per J-STD-002 and JESD22-B102, with matte tin-plated leads passing JESD201 Class 2 whisker testing - critical for under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains single high-energy surges common in load-dump and inductive switching events |
| Breakdown Voltage (VBR) | 8.65–9.55 V at 1.0 mA - defines reliable conduction onset with tight 10% tolerance |
| Clamping Voltage (VC) | 13.4 V at 112 A - limits protected circuit voltage during full-rated surge |
| Standoff Voltage (VWM) | 7.78 V - maximum continuous reverse voltage before significant leakage |
| Junction Temperature Range | −65 °C to +185 °C - enables operation in extreme under-hood automotive locations |
| Surge Current (IPPM) | 112 A (10/1000 µs) - quantifies maximum transient current the device safely shunts |
| Leakage Current (ID) | 50 µA at VWM, TJ = 150 °C - ensures minimal standby power loss in hot environments |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body meeting UL 94 V-0; matte tin-plated axial leads with cathode indicated by color band. Lead length 0.375" (9.5 mm); diameter 0.042" (1.07 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground in unidirectional TVS configuration | Provides low-impedance path to ground during reverse transient clamping |
| Cathode | Current exit point in forward bias; connected to protected line (e.g., sensor supply or signal) | Defines polarity-sensitive connection - color band marks this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR and low dynamic impedance across temperature and lifetime stress |
| AEC-Q101 qualification | Validates reliability for automotive powertrain and chassis applications per stress-test requirements |
| 1500 W peak pulse rating | Meets ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge immunity standards |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in high-temperature, long-life automotive modules |
| RoHS-compliant HE3 suffix | Confirms lead-free plating and halogen-free molding compound for environmental compliance |
Applications
| Automotive Engine Control Unit (ECU) Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protects 12 V supply rail of engine control modules against ISO 7637-2 load-dump transients up to 35 V. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery input and DC/DC converter input stage. Use Value: Clamps surge to ≤13.4 V within nanoseconds, preventing overvoltage damage to downstream PMICs and microcontrollers. | Use Scenario: Shields analog output lines of pressure/temperature sensors in factory automation systems from ESD and inductive kickback. IC Role / Device Role / Timing Role: Standoff-connected TVS on 0–5 V or 4–20 mA signal paths, referenced to local ground. Use Value: Limits transient-induced offset error and prevents latch-up in precision ADC front-ends with <50 µA leakage at 150 °C. |
| Telecom Base Station DC Power Feeds | Consumer Appliance Motor Drive Board Protection |
Use Scenario: Guards −48 V DC distribution lines in outdoor telecom cabinets exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; unidirectional 1.5KA9.1AHE3/54 used with series fuse on negative rail. Use Value: Sustains 112 A surge without degradation, maintaining clamping integrity after repeated 10/1000 µs events per IEC 61000-4-5 Level 4. | Use Scenario: Safeguards gate drivers and logic ICs on washing machine motor control boards during brush-commutator arcing. IC Role / Device Role / Timing Role: Mounted across relay coil or half-bridge drain-source nodes to absorb inductive energy. Use Value: Fast response time and low VF (3.5 V at 100 A) reduce energy dissipation in compact enclosed enclosures. |
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 | Lower peak pulse power (600 W), smaller SMB package (vs. axial 1.5KA), 9.0 V nominal VBR | Not AEC-Q101 qualified; suitable for commercial-grade consumer electronics only | Select when board space is constrained and automotive qualification is unnecessary |
| 1.5KE9.1A | Same VBR range and 1500 W rating, but TO-204AA (DO-41) package and no HE3 whisker qualification | Lacks JESD201 Class 2 and AEC-Q101 certification; limited to industrial ambient conditions | Choose only for cost-sensitive non-automotive designs where lead reliability is not mission-critical |
Compared with SMBJ9.0A and 1.5KE9.1A, the 1.5KA9.1AHE3/54 uniquely combines AEC-Q101 qualification, JESD201 Class 2 whisker resistance, and axial-leaded mechanical robustness - making it the sole option for under-hood automotive power rail protection requiring long-term thermal stability and vibration resilience.
Availability
1.5KA9.1AHE3/54 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom DC power feed protection requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 1.5KA9.1AHE3/54 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, and optoelectronics for demanding industrial and automotive applications.
The 1.5KA family was engineered specifically for automotive-grade transient suppression, emphasizing thermal endurance, surge consistency, and process-controlled reliability under AEC-Q101 stress protocols.
FAQ
What is the exact breakdown voltage range for 1.5KA9.1AHE3/54?
The 1.5KA9.1AHE3/54 has a guaranteed breakdown voltage (VBR) range of 8.65 V to 9.55 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This 10% tolerance ensures predictable clamping onset in automotive power rails where precise overvoltage thresholds are required for downstream IC protection.
Is 1.5KA9.1AHE3/54 suitable for bidirectional transient protection?
No - the 1.5KA9.1AHE3/54 is unidirectional only, as confirmed in its datasheet features and electrical characteristics table. It must be installed with cathode toward the protected line and anode to ground. For bidirectional protection, a separate symmetric TVS pair or a dedicated bidirectional device such as the 1.5SMC9.0CA is required.
What does the HE3/54 suffix mean in 1.5KA9.1AHE3/54?
The HE3 suffix denotes RoHS-compliant, high-reliability construction with matte tin-plated leads passing JESD201 Class 2 whisker testing; the /54 indicates packaging in 13" paper tape and reel with 1400 units per reel. This configuration meets automotive assembly requirements for long-term solder joint integrity and supply chain traceability.
How does 1.5KA9.1AHE3/54 perform at elevated temperatures?
At TJ = 150 °C, the 1.5KA9.1AHE3/54 maintains only 50 µA reverse leakage at VWM = 7.78 V and retains full 1500 W surge capability when derated per Figure 2. Its +185 °C max junction temperature allows uninterrupted operation in under-hood environments where ambient exceeds 125 °C.
Can 1.5KA9.1AHE3/54 replace 1.5KA9.1HE3/54 in a design?
Yes - the "A" in 1.5KA9.1AHE3/54 indicates tighter VBR tolerance (±5% vs. ±10% for non-A versions), lower clamping voltage (13.4 V vs. 13.8 V), and identical package, ratings, and qualifications. It is a direct upgrade with improved precision and margin, requiring no layout or schematic changes.
1.5KA9.1AHE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- 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
1.5KA9.1AHE3/54 FAQ
1.How can I place an order for 1.5KA9.1AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA9.1AHE3/54 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 1.5KA9.1AHE3/54 reliable?
The price and inventory of 1.5KA9.1AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA9.1AHE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KA9.1AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA9.1AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA9.1AHE3/54?
1.5KA9.1AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA9.1AHE3/54 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 1.5KA9.1AHE3/54?
For technical support, including 1.5KA9.1AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA9.1AHE3/54 requirements.
6.How does Aetrix verify that 1.5KA9.1AHE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KA9.1AHE3/54 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 1.5KA9.1AHE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KA9.1AHE3/54?
All 1.5KA9.1AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA9.1AHE3/54, 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 1.5KA9.1AHE3/54 part is unused and in its original packaging.
Return procedure for 1.5KA9.1AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA9.1AHE3/54 Tags
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