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Vishay General Semiconductor - Diodes Division 1.5KA9.1HE3/54
- Part No.:
- 1.5KA9.1HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA9.1HE3/54.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:6,016
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Product details
Overview
1.5KA9.1HE3/54 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode designed for high-reliability clamping in power and signal lines. It features a 9.1 V nominal breakdown voltage (VBR = 8.19–10.0 V), 1500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for operation up to +185 °C junction temperature - deployed in automotive sensor interfaces and MOSFET gate protection.
For engineers reviewing the 1.5KA9.1HE3/54 datasheet, 1.5KA9.1HE3/54 pinout, 1.5KA9.1HE3/54 application, or 1.5KA9.1HE3/54 equivalent, key selection criteria include clamping voltage (VC = 13.8 V at IPPM), low leakage (<50 µA at VWM = 7.37 V), and RoHS-compliant HE3 packaging with JESD201 Class 2 whisker resistance.
Technical Context
This TVS diode uses Vishay's patented PAR® construction for stable clamping under repetitive surge stress and operates exclusively in unidirectional polarity. Its 10/1000 µs waveform response delivers 109 A peak pulse current (IPPM) with 13.8 V maximum clamping voltage, enabling robust protection of downstream ICs against inductive switching transients.
Designed for automotive environments, it supports continuous operation from −65 °C to +185 °C, exhibits +0.068 %/°C temperature coefficient of VBR, and maintains <2.0 µA reverse leakage at rated stand-off voltage - critical for low-power sensor signal integrity and battery-backed systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.19 V / 10.0 V - defines reliable turn-on threshold range for transient detection and clamping initiation |
| VWM | 7.37 V - maximum continuous reverse operating voltage before leakage exceeds 50 µA |
| VC @ IPPM | 13.8 V - clamped voltage during 109 A surge, limiting stress on protected circuitry |
| PPPM | 1500 W - peak power handling capability under standardized 10/1000 µs transient waveform |
| TJ max. | +185 °C - enables use in under-hood automotive locations without thermal derating penalties |
| Leakage @ VWM | 50 µA - ensures minimal standby current draw in always-on vehicle subsystems |
Pinout & Package
Case Style 1.5KA: axial-lead DO-201AD package with matte tin-plated leads, UL 94 V-0 molded epoxy body, cathode indicated by color band. Lead length 9.5 mm (0.375"), diameter 1.07 mm (0.042").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-impedance return path in unidirectional TVS configuration |
| Cathode | Clamping output node | Connected to protected line; conducts surge current to ground when VIN > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance across temperature and lifetime, validated per AEC-Q101 stress tests |
| AEC-Q101 qualification | Confirms suitability for automotive powertrain and chassis applications requiring zero field failure risk |
| 1500 W peak pulse rating | Withstands ISO 7637-2 Pulse 1/2a/3a transients without degradation in 12 V systems |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in high-humidity, high-temperature automotive environments |
Applications
| Automotive Sensor Protection | Power Supply Input Clamping |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., oxygen, pressure) from load-dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before they reach IC input pins. Use Value: Limits voltage excursion to ≤13.8 V during 100 A surges, preserving signal integrity and preventing latch-up in 5 V/3.3 V interface ICs. | Use Scenario: Safeguarding 12 V DC-DC converter inputs against ISO 7637-2 Pulse 1 (−150 V, 50 ms) and Pulse 2a (+100 V, 100 ms). IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail, positioned upstream of EMI filter and converter controller. Use Value: Absorbs 1500 W surge energy within 1 ms, maintaining downstream regulator functionality without shutdown or damage. |
| MOSFET Gate Protection | Industrial Control Signal Lines |
Use Scenario: Shielding high-side N-channel MOSFET gates in motor drivers and solenoid controllers from Miller-induced spikes. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between gate and source to clamp dv/dt-induced overshoot during fast switching. Use Value: Responds in <1 ns to limit gate voltage to 13.8 V, preventing oxide breakdown while adding <1 pF parasitic capacitance. | Use Scenario: Hardening 24 V PLC I/O modules and fieldbus terminations (e.g., RS-485) against ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Point-of-entry protection on twisted-pair data lines, referenced to local system ground. Use Value: Maintains <50 µA leakage at 7.37 V stand-off, ensuring compatibility with high-impedance receiver inputs and minimizing false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | Lower PPPM (600 W), SMC package, bidirectional option available | Not AEC-Q101 qualified; suited for industrial/commercial only | Select when automotive qualification is not required and board space allows SMC footprint |
| 1.5KE9.1A | Same VBR range but TO-204AA (DO-41) package; no HE3 whisker rating or AEC-Q101 | Limited to non-automotive, lower-reliability environments due to missing automotive stress testing | Choose for cost-sensitive consumer designs where 185 °C operation and whisker resistance are unnecessary |
Compared with SMBJ9.0A and 1.5KE9.1A, the 1.5KA9.1HE3/54 uniquely combines AEC-Q101 qualification, 1500 W surge capacity, and JESD201 Class 2 whisker resistance - making it the only option qualified for under-hood automotive deployment with zero layout change from legacy 1.5KA designs.
Availability
1.5KA9.1HE3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, power supply input protection, and industrial control signal lines requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1.5KA9.1HE3/54 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, rectifiers, and protection devices for demanding industrial and automotive applications.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive environments - emphasizing thermal stability, surge endurance, and long-term reliability under repeated transient stress.
FAQ
What is the clamping voltage of the 1.5KA9.1HE3/54 under full-rated surge current?
The 1.5KA9.1HE3/54 exhibits a maximum clamping voltage (VC) of 13.8 V when subjected to its rated peak pulse current of 109 A using the standard 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet Document Number 88300 and reflects worst-case device behavior at TA = 25 °C. The 1.5KA9.1HE3/54 maintains this clamping performance across its full operating temperature range due to its low +0.068 %/°C VBR temperature coefficient.
Is the 1.5KA9.1HE3/54 suitable for bidirectional transient protection?
No, the 1.5KA9.1HE3/54 is a unidirectional TVS diode and is not rated for bidirectional operation. Its electrical characteristics - including breakdown voltage, leakage, and clamping - are specified only for reverse-biased (cathode-positive) conditions. For bidirectional protection, Vishay offers the 1.5KA9.1A variant, which is explicitly designated as bidirectional in the same datasheet. The 1.5KA9.1HE3/54 must be installed with correct polarity to function as intended.
Does the 1.5KA9.1HE3/54 meet automotive qualification standards?
Yes, the 1.5KA9.1HE3/54 is AEC-Q101 qualified and designated as an automotive-grade part. The "HE3" suffix indicates RoHS compliance, high reliability, and qualification to AEC-Q101 stress test requirements - including temperature cycling, high-temperature operating life, and surge endurance. This makes the 1.5KA9.1HE3/54 appropriate for use in engine control units, body electronics, and ADAS modules where zero field failure is mandatory.
What is the maximum operating temperature for the 1.5KA9.1HE3/54?
The 1.5KA9.1HE3/54 has a maximum junction temperature (TJ) rating of +185 °C, verified per AEC-Q101 testing. This allows uninterrupted operation in under-hood automotive environments where ambient temperatures exceed 125 °C. Derating curves in the datasheet confirm usable power dissipation down to TJ = 185 °C, and the device retains full 1500 W surge capability up to TA = 85 °C before linear derating begins.
How does the HE3 suffix affect the 1.5KA9.1HE3/54's reliability?
The HE3 suffix on the 1.5KA9.1HE3/54 denotes compliance with JESD201 Class 2 whisker resistance testing, RoHS Directive 2002/95/EC, and AEC-Q101 qualification. It signifies enhanced metallization and plating processes that prevent tin whisker formation under high humidity and temperature cycling - a critical reliability feature for automotive electronics with 15+ year service life expectations. The 1.5KA9.1HE3/54's HE3 designation directly supports long-term solder joint integrity and field failure prevention.
1.5KA9.1HE3/54 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
1.5KA9.1HE3/54 FAQ
1.How can I place an order for 1.5KA9.1HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA9.1HE3/54 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 1.5KA9.1HE3/54 reliable?
The price and inventory of 1.5KA9.1HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA9.1HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KA9.1HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA9.1HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA9.1HE3/54?
1.5KA9.1HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA9.1HE3/54 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 1.5KA9.1HE3/54?
For technical support, including 1.5KA9.1HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA9.1HE3/54 requirements.
6.How does Aetrix verify that 1.5KA9.1HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KA9.1HE3/54 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 1.5KA9.1HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KA9.1HE3/54?
All 1.5KA9.1HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA9.1HE3/54, 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 1.5KA9.1HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KA9.1HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA9.1HE3/54 Tags
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