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Vishay General Semiconductor - Diodes Division 1.5KA7.5AHE3/51
- Part No.:
- 1.5KA7.5AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA7.5AHE3/51.pdf
- Description:
- TVS DIODE 6.4VWM 11.3VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:6,158
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Product details
Overview
1.5KA7.5AHE3/51 from Vishay General Semiconductor is an AEC-Q101 qualified unidirectional transient voltage suppressor (TVS) diode designed for automotive and industrial overvoltage protection. It delivers 1500 W peak pulse power (10/1000 µs), clamps at 11.3 V under 5000 A surge current, and operates up to +185 °C junction temperature. Its 7.13–7.88 V breakdown voltage and 6.40 V stand-off voltage make it suitable for protecting 5 V–6 V logic interfaces in engine control units and sensor signal lines.
For engineers reviewing the 1.5KA7.5AHE3/51 datasheet, 1.5KA7.5AHE3/51 pinout, 1.5KA7.5AHE3/51 application, or 1.5KA7.5AHE3/51 equivalent, key selection criteria include its AEC-Q101 qualification, 1500 W surge rating, 11.3 V clamping voltage at 5000 A, 6.40 V working voltage, and 0.061 %/°C VBR temperature coefficient - all critical for robust ESD and load-dump protection in harsh environments.
Technical Context
This unidirectional TVS diode uses Vishay's patented PAR® construction for low incremental surge resistance and fast response time (<1 ns). It is optimized for high-temperature stability with a maximum junction temperature of +185 °C and meets JESD201 Class 2 whisker resistance requirements via its matte tin-plated leads.
The device is rated for 1500 W peak pulse power per 10/1000 µs waveform, supports 5000 A peak pulse current at 25 °C, and exhibits 2.0 µA max reverse leakage at VWM (6.40 V) when TJ = 150 °C - confirming suitability for long-life automotive electronics under thermal stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - withstands automotive load-dump transients without failure |
| Breakdown Voltage VBR | 7.13–7.88 V at 10 mA - ensures reliable triggering above 6.40 V operating rail |
| Clamping Voltage VC | 11.3 V at 5000 A - limits downstream voltage to safe levels during surge events |
| Stand-off Voltage VWM | 6.40 V - provides margin against false triggering on nominal 5 V systems |
| Max Junction Temperature | +185 °C - enables placement near hot engine compartments or power stages |
| Reverse Leakage ID | 2.0 µA at VWM, TJ = 150 °C - minimizes standby power loss in always-on modules |
| Temp Coefficient of VBR | 0.061 %/°C - ensures predictable voltage shift across wide ambient ranges |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body with UL 94 V-0 rating, matte tin-plated leads, cathode indicated by color band. Dimensions: 1.0" × 1.0" × 0.375" (25.4 mm × 25.4 mm × 9.5 mm), lead length 0.375" (9.5 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side reference in unidirectional clamp configuration |
| Cathode | Current exit point during reverse-biased clamping | Connected to protected line (e.g., CAN_H, LIN, sensor output); color band marks this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Reduces incremental surge resistance for tighter clamping and lower let-through energy |
| AEC-Q101 qualification | Validated for automotive under-hood applications including engine control and ADAS sensors |
| 1500 W peak pulse rating | Meets ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge immunity requirements |
| JESD201 Class 2 whisker resistance | Ensures long-term solder joint reliability in high-vibration, high-temperature environments |
| RoHS-compliant HE3 suffix | Meets EU directives and supports lead-free reflow assembly without compromising surge performance |
Applications
| Engine Control Unit (ECU) Power Input | Automotive CAN Bus Line Protection |
|---|---|
Use Scenario: Protects 12 V supply input of engine control modules against battery load-dump transients up to 40 V. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC input stage. Use Value: Clamps to 11.3 V at 5000 A, preventing damage to upstream regulators and microcontrollers while maintaining AEC-Q101 compliance. |
Use Scenario: Shields CAN_H and CAN_L differential pair from ESD and coupled transients in vehicle networking. IC Role / Device Role / Timing Role: Bidirectional protection implemented using two 1.5KA7.5AHE3/51 devices (cathode-to-rail configuration). Use Value: 6.40 V stand-off avoids interference with 3.3 V or 5 V CAN transceiver logic thresholds while delivering 1500 W surge handling. |
| Industrial Sensor Signal Conditioning | Automotive LIN Bus Interface |
Use Scenario: Guards analog outputs of pressure/temperature sensors in factory automation against inductive switching noise. IC Role / Device Role / Timing Role: Low-leakage (2.0 µA @ 150 °C) TVS placed at sensor PCB edge before cable connector. Use Value: Maintains signal integrity with minimal offset error due to ultra-low reverse leakage and stable VBR drift (0.061 %/°C). |
Use Scenario: Protects LIN slave node transceivers from battery voltage spikes and electrostatic discharge during assembly or service. IC Role / Device Role / Timing Role: Unidirectional clamp connected between LIN bus line and chassis ground. Use Value: 7.13–7.88 V breakdown aligns with LIN physical layer's 12 V nominal supply, enabling precise overvoltage thresholding without false triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A | Lower peak power (600 W), smaller SMB package (3.5 mm × 4.6 mm), 7.78 V min VBR | Not AEC-Q101 qualified; limited to consumer/industrial use below 150 °C | Select when space-constrained PCB layout and non-automotive qualification suffice |
| 1.5KE7.5A | Same 1500 W rating but TO-204AE (axial lead) package; no HE3 whisker qualification; 7.13–7.88 V VBR identical | Lacks AEC-Q101 and JESD201 Class 2 certification; higher thermal resistance than 1.5KA case | Choose only for legacy axial designs where board-level vibration and long-term whisker risk are not concerns |
Compared with SMBJ7.0A and 1.5KE7.5A, the 1.5KA7.5AHE3/51 uniquely combines AEC-Q101 qualification, JESD201 Class 2 whisker resistance, and 1.5KA case thermal performance - making it the only option validated for under-hood automotive deployment with zero derating up to +185 °C.
Availability
1.5KA7.5AHE3/51 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and LIN/CAN bus hardening requiring stable component supply across extended temperature and lifecycle demands.
Supply support for 1.5KA7.5AHE3/51 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 passive components for automotive, industrial, and computing markets.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in harsh-environment electronics - emphasizing thermal robustness, surge consistency, and long-term whisker-free solder joint integrity.
FAQ
What is the clamping voltage of the 1.5KA7.5AHE3/51 under full-rated surge current?
The 1.5KA7.5AHE3/51 clamps to a maximum of 11.3 V when subjected to its rated peak pulse current of 5000 A (10/1000 µs waveform) at TA = 25 °C. This value is measured per ANSI/IEEE C62.35 and confirmed in the Electrical Characteristics table on page 2 of Vishay document 88300. The low clamping ratio (VC/VBR ≈ 1.45) reflects efficient energy diversion without overstressing downstream ICs.
Is the 1.5KA7.5AHE3/51 qualified for automotive applications?
Yes, the 1.5KA7.5AHE3/51 is explicitly AEC-Q101 qualified, as stated in the Mechanical Data section and footnote (1) on page 3 of Vishay document 88300. Its HE3 suffix denotes RoHS compliance and high-reliability automotive grade, including JESD201 Class 2 whisker testing and operation up to +185 °C junction temperature - meeting requirements for engine control, ADAS, and body electronics.
What does the "HE3/51" suffix mean in 1.5KA7.5AHE3/51?
The "HE3" suffix indicates RoHS-compliant, high-reliability construction with matte tin-plated leads that pass JESD201 Class 2 whisker testing. The "/51" denotes the preferred packaging code: 13" diameter paper tape and reel, with base quantity 1400 units per reel. This matches the ordering information example shown on page 3 of Vishay document 88300.
How does the 1.5KA7.5AHE3/51 compare to the 1.5KA7.5 version without the "A" suffix?
The "A" in 1.5KA7.5AHE3/51 denotes a tighter breakdown voltage tolerance: 7.13–7.88 V (±5 % around 7.5 V), versus 6.75–8.25 V (±10 %) for the non-A variant. Both share identical power rating (1500 W), clamping (11.3 V vs. 11.7 V), and AEC-Q101 qualification. The "A" version is preferred for precision thresholding in safety-critical circuits.
Can the 1.5KA7.5AHE3/51 be used in bidirectional configurations?
No - the 1.5KA7.5AHE3/51 is unidirectional only, as confirmed in the FEATURES section (page 1): "Available in uni-directional polarity only." For bidirectional protection, two 1.5KA7.5AHE3/51 devices must be used in opposing series configuration (anode-to-anode), or a dedicated bidirectional part like SMAJ7.0CA should be selected instead.
1.5KA7.5AHE3/51 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):
- 6.4V
- Voltage - Breakdown (Min):
- 7.13V
- Voltage - Clamping (Max) @ Ipp:
- 11.3V
- Current - Peak Pulse (10/1000µs):
- 133A
- 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
1.5KA7.5AHE3/51 FAQ
1.How can I place an order for 1.5KA7.5AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA7.5AHE3/51 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 1.5KA7.5AHE3/51 reliable?
The price and inventory of 1.5KA7.5AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA7.5AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA7.5AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA7.5AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA7.5AHE3/51?
1.5KA7.5AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA7.5AHE3/51 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 1.5KA7.5AHE3/51?
For technical support, including 1.5KA7.5AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA7.5AHE3/51 requirements.
6.How does Aetrix verify that 1.5KA7.5AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA7.5AHE3/51 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 1.5KA7.5AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA7.5AHE3/51?
All 1.5KA7.5AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA7.5AHE3/51, 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 1.5KA7.5AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA7.5AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA7.5AHE3/51 Tags
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