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Vishay General Semiconductor - Diodes Division 1.5KA24HE3/73
- Part No.:
- 1.5KA24HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA24HE3/73.pdf
- Description:
- TVS DIODE 19.4VWM 34.7VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:7,264
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Product details
Overview
1.5KA24HE3/73 from Vishay General Semiconductor is a unidirectional automotive-grade 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), 21.6–26.4 V breakdown voltage (VBR), 34.7 V maximum clamping voltage (VC) at 43.2 A, and AEC-Q101 qualification for under-hood automotive electronics.
For engineers reviewing the 1.5KA24HE3/73 datasheet, 1.5KA24HE3/73 pinout, 1.5KA24HE3/73 application, or 1.5KA24HE3/73 equivalent, key selection criteria include clamping performance under 10/1000 µs transients, junction temperature capability up to +185 °C, RoHS-compliant HE3 packaging with JESD201 Class 2 whisker resistance, and compatibility with inductive load switching protection in sensor signal lines.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable clamping under repetitive surge stress and operates exclusively in unidirectional polarity, with cathode denoted by a color band. Its low incremental surge resistance and fast response time ensure effective suppression of ESD and load-dump transients in automotive power domains.
The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), 6.5 W steady-state power dissipation on infinite heatsink at TL = 75 °C, and maintains reliable operation across –65 °C to +185 °C junction temperature range-critical for engine control unit (ECU) and body electronics integration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains automotive load-dump surges without degradation |
| Breakdown Voltage VBR | 21.6–26.4 V at 1.0 mA - defines precise overvoltage triggering threshold |
| Clamping Voltage VC | 34.7 V at 43.2 A - limits downstream IC voltage during worst-case transient |
| Stand-off Voltage VWM | 19.4 V - ensures no conduction during normal 12 V system operation |
| Junction Temperature Range | –65 °C to +185 °C - supports under-hood placement in modern vehicles |
| AEC-Q101 Qualified | Yes - validated for automotive reliability per stress test requirements |
| RoHS & Whisker Compliance | HE3 suffix: RoHS-compliant, JESD201 Class 2 tin whisker resistant |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body with matte tin-plated leads; UL 94 V-0 rated; lead length 0.375" (9.5 mm); diameter 0.210" (5.3 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to protected circuit ground or low-side return path |
| Cathode | Current exit terminal in forward bias; marked with color band | Connected to protected line (e.g., sensor supply or CAN bus line) |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR and low dynamic impedance across temperature and life cycles |
| 1500 W peak pulse power (10/1000 µs) | Meets ISO 7637-2 Pulse 5a (load dump) immunity requirements for 12 V systems |
| Low clamping ratio (VC/VBR ≈ 1.5) | Minimizes voltage overshoot during surge, protecting 3.3 V/5 V logic interfaces |
| AEC-Q101 qualified & HE3 packaging | Validated for automotive use with enhanced whisker resistance and thermal robustness |
| Fast response time & low surge resistance | Clamps transients within nanoseconds, limiting energy delivered to downstream ICs |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protects microcontroller I/O and power rails from alternator load-dump transients and relay coil flyback in gasoline/diesel ECUs. IC Role / Device Role: Primary clamping element placed between battery rail and local DC/DC input or MCU supply pin. Use Value: Clamps 12 V system surges to ≤34.7 V, preventing latch-up or permanent damage to 5 V tolerant automotive MCUs. |
Use Scenario: Shields analog front-end inputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role: Unidirectional TVS on 24 V sensor supply line, positioned upstream of LDO regulator. Use Value: Limits induced switching transients (<100 ns rise time) to safe levels before reaching precision ADC reference paths. |
| Automotive Body Control Module (BCM) | Telecom Power Interface Protection |
Use Scenario: Safeguards LIN bus transceivers and LED driver outputs against ESD and inductive kickback from solenoid loads. IC Role / Device Role: Line-side TVS on 12 V switched output driving door locks or mirror actuators. Use Value: Withstands ≥200 A surge (8.3 ms) while maintaining <1 µA leakage at 19.4 V standby, minimizing quiescent current drain. |
Use Scenario: Protects PoE-powered Ethernet switch ports from lightning-induced surges on 48 V DC input rails. IC Role / Device Role: Secondary surge clamp after primary GDT/MOV stage, handling residual fast transients. Use Value: Provides precise 34.7 V clamping ceiling for 48 V nominal systems, ensuring downstream DC/DC converters remain within absolute max ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24AHE3/52 | Lower peak power (600 W), smaller SMB package, bidirectional option available | Better suited for space-constrained PCBs with lower-energy transients (e.g., USB or data lines) | Select when board area is critical and surge energy does not exceed 600 W capability |
| 1.5KE24A-E3/54 | Same 1.5 kW rating but TO-204AA (DO-201AD) package; no AEC-Q101 qualification | Applicable in industrial/commercial power supplies where automotive reliability is not required | Choose for cost-sensitive non-automotive designs needing identical electrical specs without qualification overhead |
Compared with SMBJ24AHE3/52 and 1.5KE24A-E3/54, the 1.5KA24HE3/73 uniquely combines AEC-Q101 qualification, 1.5 kW surge capacity in a ruggedized axial-leaded package, and guaranteed 185 °C junction operation-making it the only choice for under-hood automotive power rail protection where reliability and thermal margin are non-negotiable.
Availability
1.5KA24HE3/73 is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor interfaces, telecom power inputs, and body electronics requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1.5KA24HE3/73 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 high-reliability diodes, MOSFETs, and optoelectronics for demanding industrial and automotive applications.
The 1.5KA series was engineered specifically for automotive transient suppression-delivering AEC-Q101 qualified, high-temperature-stable TVS protection with consistent clamping performance across extended temperature and lifetime stress conditions.
FAQ
What is the clamping voltage of the 1.5KA24HE3/73 at its rated peak pulse current?
The 1.5KA24HE3/73 has a maximum clamping voltage (VC) of 34.7 V at its rated peak pulse current of 43.2 A (10/1000 µs waveform). This value is measured under standardized test conditions and ensures predictable overvoltage limiting during automotive load-dump events. The 1.5KA24HE3/73 maintains this clamping performance across its full operating temperature range, supporting robust design margins in ECU and BCM applications.
Is the 1.5KA24HE3/73 suitable for bidirectional transient protection?
No-the 1.5KA24HE3/73 is a unidirectional TVS diode, as explicitly stated in the Vishay datasheet. It conducts only during reverse-biased overvoltage events and must be oriented with the cathode toward the protected line. For bidirectional protection, a separate part number (e.g., 1.5KA24AHE3/73) is required. The 1.5KA24HE3/73 is optimized for DC power rail protection where polarity is fixed and reverse conduction is not needed.
What does the HE3 suffix indicate for the 1.5KA24HE3/73?
The HE3 suffix on the 1.5KA24HE3/73 denotes Vishay's high-reliability, automotive-grade packaging: RoHS-compliant construction, matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and passing JESD201 Class 2 whisker testing. This ensures long-term solder joint integrity in thermally cycled automotive environments. The 1.5KA24HE3/73 is not a generic variant-it is the qualified version intended for AEC-Q101 applications.
Can the 1.5KA24HE3/73 replace the older 1.5KE24A in an existing design?
The 1.5KA24HE3/73 is not a direct drop-in replacement for the 1.5KE24A due to differences in package (Case Style 1.5KA vs. DO-201AD), lead configuration (axial leads vs. radial), and qualification status (AEC-Q101 vs. commercial grade). While electrical parameters align closely, mechanical fit, thermal path, and automotive compliance require validation. The 1.5KA24HE3/73 should only replace 1.5KE24A after layout review and reliability requalification.
What is the maximum junction temperature rating for the 1.5KA24HE3/73?
The 1.5KA24HE3/73 has a maximum junction temperature (TJ) rating of +185 °C, verified per AEC-Q101 stress testing. This enables reliable operation in under-hood locations such as engine compartments and transmission control modules. The 1.5KA24HE3/73 sustains full electrical specifications-including VBR stability and clamping performance-up to this limit, distinguishing it from standard industrial TVS diodes rated only to +150 °C.
1.5KA24HE3/73 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):
- 19.4V
- Voltage - Breakdown (Min):
- 21.6V
- Voltage - Clamping (Max) @ Ipp:
- 34.7V
- Current - Peak Pulse (10/1000µs):
- 43.2A
- 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
1.5KA24HE3/73 FAQ
1.How can I place an order for 1.5KA24HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA24HE3/73 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 1.5KA24HE3/73 reliable?
The price and inventory of 1.5KA24HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA24HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KA24HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA24HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA24HE3/73?
1.5KA24HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA24HE3/73 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 1.5KA24HE3/73?
For technical support, including 1.5KA24HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA24HE3/73 requirements.
6.How does Aetrix verify that 1.5KA24HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KA24HE3/73 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 1.5KA24HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KA24HE3/73?
All 1.5KA24HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA24HE3/73, 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 1.5KA24HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KA24HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA24HE3/73 Tags
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