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Vishay General Semiconductor - Diodes Division 1.5KA24AHE3/51
- Part No.:
- 1.5KA24AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA24AHE3/51.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:9,805
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Product details
Overview
1.5KA24AHE3/51 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 22.8 V to 25.2 V breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), 33.2 V clamping voltage at 45.2 A, and AEC-Q101 qualification for under-hood automotive electronics.
For engineers reviewing the 1.5KA24AHE3/51 datasheet, 1.5KA24AHE3/51 pinout, 1.5KA24AHE3/51 application, or 1.5KA24AHE3/51 equivalent, key selection criteria include clamping performance under 10/1000 µs transients, junction temperature capability up to +185 °C, RoHS-compliant HE3 packaging, and compatibility with inductive load switching protection in automotive ECUs and sensor interfaces.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable clamping under repeated 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 without compromising signal integrity on protected lines.
The device is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), supports soldering at 260 °C for 40 s, and maintains reliable operation across –65 °C to +185 °C junction temperature range - critical for engine control, body electronics, and ADAS subsystems exposed to thermal cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V - defines precise voltage threshold at which clamping initiates under 10 mA test current |
| VC @ IPPM | 33.2 V - maximum clamped voltage during 45.2 A 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 1500 W - peak transient energy handling capacity per standard 10/1000 µs waveform |
| TJ max. | +185 °C - enables deployment in high-temperature automotive zones without derating penalties |
| IFSM | 200 A - withstands 8.3 ms inductive turn-off surges common in solenoid and relay drivers |
| VWM | 20.5 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| Package | Case Style 1.5KA - axial-lead, molded epoxy package with UL 94 V-0 rating and matte tin-plated leads |
Pinout & Package
Case Style 1.5KA is an axial-leaded, DO-201AD-compatible package with cathode indicated by a color band. Leads are matte tin-plated and compliant with J-STD-002 and JESD22-B102 solderability standards. The HE3 suffix denotes RoHS compliance, AEC-Q101 qualification, and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Clamping terminal | Marked with color band; connected to protected line (e.g., CAN_H, LIN, sensor supply) to shunt overvoltage to ground |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Ensures consistent VBR stability and low dynamic impedance across temperature and lifetime stress |
| AEC-Q101 qualification | Validated for automotive under-hood use including thermal cycling, humidity, and mechanical shock testing |
| 1500 W peak pulse power (10/1000 µs) | Meets ISO 7637-2 Pulse 5a/b (load dump) and IEC 61000-4-5 surge immunity requirements |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes voltage overshoot during transients, protecting 24 V-rated logic and analog front-ends |
| RoHS-compliant HE3 packaging | Enables lead-free reflow and wave soldering while meeting automotive reliability and whisker mitigation standards |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protection of microcontroller I/O and power supply rails against alternator load dump and relay coil flyback in 24 V diesel/gasoline ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and regulator input or MCU VDD pin. Use Value: Limits transient voltage to ≤33.2 V during 1500 W surges, preventing latch-up or gate oxide damage in 3.3 V/5 V logic powered from buck converters. | Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to field wiring inductive kick and ESD events. IC Role / Device Role / Timing Role: Primary surge suppression element on each optocoupler input side, mounted near connector entry point. Use Value: Clamps 10/1000 µs transients to 33.2 V within nanoseconds, preserving signal integrity and enabling >100 kV/µs dv/dt immunity per IEC 61000-4-4. |
| Automotive Body Control Module (BCM) | Telecom Power Supply Interface |
Use Scenario: Overvoltage protection for LIN bus transceivers and window lift motor drivers subjected to battery reversal and jump-start conditions. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; used as unidirectional clamp from LIN line to chassis ground with series resistor. Use Value: Withstands 185 °C junction temperature during prolonged under-hood operation and maintains <1 µA leakage at 20.5 V standby. | Use Scenario: Front-end surge protection for 24 V telecom power supplies interfacing with outdoor copper lines susceptible to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage clamping device upstream of DC-DC converter, sized to absorb full IEC 61000-4-5 Level 4 (4 kV) energy. Use Value: Delivers 1500 W peak power handling with 33.2 V clamping, reducing secondary protection burden and enabling compact board layout. |
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 PPPM (600 W), smaller SMB package, same VBR range (22.8–25.2 V), lower IPPM (32.3 A) | Not AEC-Q101 qualified; suited for commercial/industrial PCB space-constrained designs | Select when automotive qualification is unnecessary and board area is limited |
| 1.5KE24A | Same 1500 W rating but legacy DO-201AE package; no HE3 suffix; not AEC-Q101 qualified; higher VC (38.9 V) | Used in legacy industrial power supplies where automotive reliability is not required | Select only for cost-sensitive, non-automotive replacements with existing DO-201AE footprint |
Compared with SMBJ24AHE3/52 and 1.5KE24A, the 1.5KA24AHE3/51 provides superior thermal robustness (TJ = +185 °C), guaranteed AEC-Q101 compliance, and tighter clamping (33.2 V vs. 38.9 V), making it the preferred choice for next-generation automotive electronics requiring long-term reliability under thermal stress.
Availability
1.5KA24AHE3/51 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC input modules, and telecom power supply interfaces requiring stable component supply, AEC-Q101 qualification, and high-temperature surge resilience.
Supply support for 1.5KA24AHE3/51 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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade validation.
The 1.5KA family was engineered specifically for high-energy transient suppression in 24 V automotive systems, targeting load-dump immunity, ESD hardening, and extended temperature operation beyond standard industrial requirements.
FAQ
What is the clamping voltage of the 1.5KA24AHE3/51 under peak surge conditions?
The 1.5KA24AHE3/51 exhibits a maximum clamping voltage (VC) of 33.2 V when subjected to its rated peak pulse current of 45.2 A using the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C and ensures downstream components see minimal overvoltage during transient events. The 1.5KA24AHE3/51 maintains this clamping performance across its full operating temperature range due to low temperature coefficient of VBR (0.094 %/°C).
Is the 1.5KA24AHE3/51 suitable for automotive applications requiring AEC-Q101 certification?
Yes, the 1.5KA24AHE3/51 is explicitly qualified to AEC-Q101 for automotive use, as confirmed in Vishay document 88300. Its HE3 suffix denotes high-reliability, RoHS-compliant construction validated for thermal cycling, humidity, mechanical shock, and high-temperature operation up to +185 °C junction temperature - meeting stringent requirements for engine control, body electronics, and ADAS modules.
What does the "HE3" suffix mean in 1.5KA24AHE3/51?
The HE3 suffix in 1.5KA24AHE3/51 indicates RoHS-compliant, high-reliability packaging with matte tin-plated leads that meet J-STD-002 and JESD22-B102 solderability standards. It also certifies compliance with JESD201 Class 2 whisker resistance testing and confirms AEC-Q101 qualification - distinguishing it from non-automotive variants like standard 1.5KA24A.
How does the 1.5KA24AHE3/51 differ from the 1.5KA24A variant?
The 1.5KA24AHE3/51 is the RoHS-compliant, AEC-Q101-qualified version of the 1.5KA24A, featuring HE3 packaging with enhanced whisker resistance and automotive-grade reliability testing. While both share identical electrical characteristics (VBR, VC, PPPM), only the HE3/51 variant carries formal automotive qualification and meets stricter process controls for solderability and long-term stability in thermal cycling environments.
Can the 1.5KA24AHE3/51 be used in bidirectional configurations?
No, the 1.5KA24AHE3/51 is specified for unidirectional polarity only, as stated in the Vishay datasheet. Its internal structure and test methodology assume cathode-to-anode conduction for clamping. For bidirectional protection, two 1.5KA24AHE3/51 devices must be connected in series opposition - though dedicated bidirectional TVS devices (e.g., 1.5SMC24CAHE3/A) are recommended for such applications.
1.5KA24AHE3/51 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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 45.2A
- 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
1.5KA24AHE3/51 FAQ
1.How can I place an order for 1.5KA24AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA24AHE3/51 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 1.5KA24AHE3/51 reliable?
The price and inventory of 1.5KA24AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA24AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA24AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA24AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA24AHE3/51?
1.5KA24AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA24AHE3/51 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 1.5KA24AHE3/51?
For technical support, including 1.5KA24AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA24AHE3/51 requirements.
6.How does Aetrix verify that 1.5KA24AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA24AHE3/51 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 1.5KA24AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA24AHE3/51?
All 1.5KA24AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA24AHE3/51, 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 1.5KA24AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA24AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA24AHE3/51 Tags
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