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Vishay General Semiconductor - Diodes Division 1.5KA7.5HE3/51
- Part No.:
- 1.5KA7.5HE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA7.5HE3/51.pdf
- Description:
- TVS DIODE 6.05VWM 11.7VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:9,953
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Product details
Overview
1.5KA7.5HE3/51 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode designed for high-energy surge protection in power rails and signal lines. It features a 1500 W peak pulse power rating (10/1000 µs), 6.75–8.25 V breakdown voltage (VBR), 11.7 V maximum clamping voltage (VC) at 128 A, and AEC-Q101 qualification for under-hood automotive electronics.
For engineers reviewing the 1.5KA7.5HE3/51 datasheet, 1.5KA7.5HE3/51 pinout, 1.5KA7.5HE3/51 application, or 1.5KA7.5HE3/51 equivalent, key selection criteria include clamping performance at 128 A IPPM, -65 °C to +185 °C operating junction temperature, RoHS-compliant HE3 packaging, and compatibility with 10/1000 µs surge waveforms in engine control units and sensor interfaces.
Technical Context
This TVS diode uses patented PAR® construction for stable clamping under repetitive surge stress and operates exclusively in unidirectional polarity. Its low incremental surge resistance and fast response time ensure effective suppression of inductive switching transients up to 1500 W without thermal runaway.
The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), exhibits 0.061 %/°C VBR temperature coefficient, and maintains reliable operation at TJ = 185 °C - enabling use in high-temperature automotive environments where conventional TVS devices degrade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains single high-energy surges common in automotive load-dump events |
| Breakdown Voltage VBR | 6.75–8.25 V at 10 mA - defines precise voltage threshold for avalanche conduction |
| Clamping Voltage VC | 11.7 V at 128 A IPPM - limits downstream voltage stress during worst-case surge |
| Stand-off Voltage VWM | 6.05 V - ensures no conduction during normal 5 V or 6 V rail operation |
| Operating Junction Temp. | -65 °C to +185 °C - supports placement near engines or power converters without derating |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including temperature cycling, HTRB, and ESD |
| RoHS & Whisker Tested | HE3 suffix meets JESD201 Class 2 - eliminates tin whisker risk in long-life automotive modules |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body with matte tin-plated leads; UL 94 V-0 rated; 0.375" (9.5 mm) lead length; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction | Connected to protected circuit ground or low-side return path |
| Cathode | Current exit during reverse-biased clamping | Connected to protected line (e.g., 12 V battery rail); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables uniform current distribution across junction area, preventing localized hot spots during 1500 W surges |
| 1500 W peak pulse power (10/1000 µs) | Meets ISO 7637-2 Pulse 5a load-dump immunity requirements for 12 V automotive systems |
| AEC-Q101 qualification | Validated for automotive under-hood use including HTGB, H3TRB, and temperature cycling per test plan |
| Low clamping ratio (VC/VBR ≈ 1.74) | Minimizes overvoltage exposure to downstream MOSFETs or microcontrollers during transients |
| 185 °C max junction temperature | Allows direct mounting on high-temperature PCB areas without thermal derating penalties |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Power Supply |
|---|---|
Use Scenario: Protection of 12 V supply input against load-dump transients during alternator disconnection. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC converter input. Use Value: Limits voltage to ≤11.7 V during 128 A surges, preventing damage to 16 V-rated input capacitors and controller ICs. |
Use Scenario: Safeguarding gate driver supply rails from inductive kickback when IGBTs switch high-current motor windings. IC Role / Device Role / Timing Role: Fast-response surge suppressor across isolated 15 V gate supply output. Use Value: Clamps transients within nanoseconds, maintaining gate drive integrity and avoiding false turn-on of power devices. |
| Automotive Sensor Interface Module | Telecom Power Entry Protection |
Use Scenario: Shielding LIN bus or analog sensor inputs (e.g., coolant temp, pressure) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage (500 µA max at VWM) TVS placed at connector entry point. Use Value: Maintains signal fidelity with <2 µA leakage at 6.05 V while suppressing ±30 kV ESD per IEC 61000-4-2. |
Use Scenario: Front-end protection of AC/DC power supplies in outdoor telecom cabinets exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge arrestor on 48 V DC input before bulk capacitor and PFC stage. Use Value: Absorbs 1500 W pulses without failure, reducing need for secondary MOV-based protection stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5AHE3/52 | Lower peak power (600 W), smaller SMB package, tighter VBR tolerance (±5 % vs. ±10 %) | Rated for lower-energy transients; not qualified to AEC-Q101 | Select when space-constrained layouts require SMT and surge energy remains below 600 W |
| 1.5KE7.5C | Same 1500 W rating but standard industrial grade (not AEC-Q101), higher leakage (1000 µA at VWM) | Lacks automotive qualification and high-temp reliability validation | Acceptable for non-automotive industrial use where cost is prioritized over extended temperature margin |
Compared with SMBJ7.5AHE3/52 and 1.5KE7.5C, the 1.5KA7.5HE3/51 delivers superior high-temperature stability (185 °C TJ), lower leakage (500 µA), and AEC-Q101 validation - making it the only choice for under-hood automotive designs requiring sustained reliability beyond 125 °C ambient.
Availability
1.5KA7.5HE3/51 is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, and telecom power entry circuits requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5KA7.5HE3/51 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 high-reliability diodes, MOSFETs, and optoelectronics for demanding industrial and automotive applications.
The 1.5KA series was engineered specifically for automotive transient suppression, combining PAR® technology, AEC-Q101 qualification, and high-temperature capability to replace older 1.5KE parts in next-generation ECUs and ADAS power systems.
FAQ
What is the clamping voltage of the 1.5KA7.5HE3/51 at its rated peak pulse current?
The 1.5KA7.5HE3/51 has a maximum clamping voltage (VC) of 11.7 V at 128 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components see no more than 11.7 V during worst-case surge events - critical for protecting 12 V-rated ICs and MOSFETs. The 1.5KA7.5HE3/51 achieves this with low incremental surge resistance inherent to its PAR® construction.
Is the 1.5KA7.5HE3/51 suitable for bidirectional transient protection?
No, the 1.5KA7.5HE3/51 is unidirectional only, as confirmed in the Vishay datasheet Document Number 88300. It conducts in reverse bias above VBR but blocks forward current beyond ~3.5 V. For bidirectional protection (e.g., data lines subject to ± surges), a dual-diode configuration or a dedicated bidirectional TVS like SMAJ7.5CA must be used instead of the 1.5KA7.5HE3/51.
Does the 1.5KA7.5HE3/51 meet automotive qualification standards?
Yes, the 1.5KA7.5HE3/51 carries the HE3 suffix indicating AEC-Q101 qualification for automotive use. It has passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and unbiased highly accelerated stress testing (uHAST). This validation confirms suitability for under-hood applications where ambient temperatures exceed 105 °C and long-term reliability is mandatory - a key differentiator of the 1.5KA7.5HE3/51 versus industrial-grade alternatives.
What is the maximum operating temperature for the 1.5KA7.5HE3/51 junction?
The 1.5KA7.5HE3/51 has a maximum junction temperature (TJ) rating of +185 °C, verified per the Vishay datasheet. This allows direct placement near heat sources such as power inductors or IGBTs without thermal derating, unlike standard TVS diodes limited to 150 °C. The 1.5KA7.5HE3/51 maintains stable VBR and clamping performance across this full range due to its 0.061 %/°C temperature coefficient.
How does the 1.5KA7.5HE3/51 differ from the 1.5KA7.5A variant?
The 1.5KA7.5HE3/51 and 1.5KA7.5A share identical electrical specs (VBR, VC, PPPM) but differ in qualification and packaging: the 1.5KA7.5HE3/51 is RoHS-compliant, AEC-Q101 qualified, and passes JESD201 Class 2 whisker testing, whereas the 1.5KA7.5A lacks the HE3 suffix and associated automotive validation. Thus, only the 1.5KA7.5HE3/51 is approved for safety-critical automotive modules - a distinction critical for ECU and ADAS designs.
1.5KA7.5HE3/51 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):
- 6.05V
- Voltage - Breakdown (Min):
- 6.75V
- Voltage - Clamping (Max) @ Ipp:
- 11.7V
- Current - Peak Pulse (10/1000µs):
- 128A
- 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
1.5KA7.5HE3/51 FAQ
1.How can I place an order for 1.5KA7.5HE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA7.5HE3/51 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 1.5KA7.5HE3/51 reliable?
The price and inventory of 1.5KA7.5HE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA7.5HE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA7.5HE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA7.5HE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA7.5HE3/51?
1.5KA7.5HE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA7.5HE3/51 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 1.5KA7.5HE3/51?
For technical support, including 1.5KA7.5HE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA7.5HE3/51 requirements.
6.How does Aetrix verify that 1.5KA7.5HE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA7.5HE3/51 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 1.5KA7.5HE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA7.5HE3/51?
All 1.5KA7.5HE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA7.5HE3/51, 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 1.5KA7.5HE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA7.5HE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA7.5HE3/51 Tags
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