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Vishay General Semiconductor - Diodes Division 1.5KA24HE3/51
- Part No.:
- 1.5KA24HE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA24HE3/51.pdf
- Description:
- TVS DIODE 19.4VWM 34.7VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:7,357
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Product details
Overview
1.5KA24HE3/51 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode designed for robust overvoltage protection in harsh environments. It features a 21.6–26.4 V breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), 34.7 V clamping voltage at 43.2 A, and AEC-Q101 qualification for automotive reliability. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients.
For engineers reviewing the 1.5KA24HE3/51 datasheet, 1.5KA24HE3/51 pinout, 1.5KA24HE3/51 application, or 1.5KA24HE3/51 equivalent, key selection criteria include clamping performance under 10/1000 µs surge, junction temperature derating to +185 °C, RoHS-compliant HE3 packaging, and unidirectional polarity with cathode band marking.
Technical Context
This TVS diode employs patented PAR® construction for low incremental surge resistance and stable clamping across temperature. Its unidirectional configuration provides forward conduction path during reverse overvoltage events, enabling fast response (<1 ns) and precise stand-off voltage control at 19.4 V (VWM).
Rated for operation from −65 °C to +185 °C, it supports high-reliability automotive applications where thermal cycling and long-term stability are critical. The device meets JESD201 Class 2 whisker resistance and withstands solder dip at 260 °C for 40 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 21.6 V / 26.4 V - Ensures reliable triggering above system operating voltage while avoiding false trips |
| VWM | 19.4 V - Maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 34.7 V - Clamped voltage at 43.2 A peak pulse current; defines protected circuit's maximum stress level |
| PPPM | 1500 W - Peak surge power handling capability with standard 10/1000 µs waveform |
| TJ max. | +185 °C - Enables use in under-hood automotive locations without thermal derating penalties |
| IFSM | 200 A - Withstands 8.3 ms half-sine surge, supporting motor driver and solenoid switch protection |
| Package | Case Style 1.5KA - Axial-lead, molded epoxy body with UL 94 V-0 rating and matte tin-plated leads |
Pinout & Package
Case Style 1.5KA is an axial-leaded 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-compliant, high-reliability automotive grade per AEC-Q101.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; enables clamping when cathode is at higher potential |
| Cathode | Reverse-biased clamping terminal | Marked with color band; connected to supply rail or signal line to be protected against positive transients |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Reduces incremental surge resistance for tighter clamping and improved energy absorption consistency |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| 10/1000 µs waveform rating | Supports IEC 61000-4-5 Level 4 surge immunity compliance in industrial and automotive systems |
| Junction temperature range | −65 °C to +185 °C enables deployment in engine control units, battery management, and ADAS sensors |
| RoHS & WEEE compliant | Meets EU environmental directives; HE3 suffix confirms JESD201 Class 2 whisker resistance |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Protection of microcontroller I/O and CAN transceiver pins against load dump and inductive kickback from fuel injectors and ignition coils. IC Role / Device Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients to ≤34.7 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic interfaces while maintaining signal integrity during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding gate drivers and current-sense amplifiers in variable-frequency drives exposed to relay contact bounce and transformer switching noise. IC Role / Device Role: Standoff-rated TVS on isolated feedback paths and auxiliary power rails. Use Value: Limits transient overshoot to <35 V, preserving isolation barrier integrity and preventing false triggering of overcurrent protection. |
| Automotive ADAS Camera Module | Telecom Power Supply Input |
Use Scenario: Shielding MIPI CSI-2 data lines and power inputs in front-facing cameras subjected to ESD and conducted surges from nearby radar modules. IC Role / Device Role: Low-capacitance unidirectional TVS on 12 V bias rail and differential video lines. Use Value: Clamps 1500 W surges without degrading 1.5 Gbps signal integrity; operates reliably at +105 °C ambient. |
Use Scenario: Primary-stage surge suppression on −48 V telecom rectifier outputs feeding base station backplane regulators. IC Role / Device Role: High-energy TVS in series with input filter to absorb lightning-induced surges per ITU-T K.20. Use Value: Absorbs 10/1000 µs surges up to 43.2 A while maintaining <1 µA leakage at −48 V nominal, minimizing standby loss. |
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 | Surface-mount SMB package; 24 V nominal VBR; 600 W PPPM; bidirectional option available | Limited to PCB space-constrained designs; lower surge rating reduces margin for high-energy automotive load dump | Select when board area is constrained and peak surge energy does not exceed 600 W |
| 1.5KE24A | Through-hole DO-201 package; same VBR range but non-automotive grade; no AEC-Q101 qualification; 1500 W rating | Not qualified for automotive use; lacks HE3 whisker resistance and extended temperature validation | Acceptable for industrial or consumer applications where AEC-Q101 is not mandated |
Compared with 1.5KA24HE3/51, SMBJ24AHE3/52 trades surge capacity and automotive qualification for compactness, while 1.5KE24A retains power rating but omits AEC-Q101 validation and high-temperature reliability-making 1.5KA24HE3/51 the only choice for under-hood automotive deployment requiring full qualification.
Availability
1.5KA24HE3/51 is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, ADAS camera modules, and telecom power supply inputs requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KA24HE3/51 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 demanding industrial and automotive applications.
The 1.5KA family was engineered specifically for AEC-Q101-compliant transient suppression in automotive powertrain and chassis systems, emphasizing thermal stability, surge robustness, and long-term parametric consistency.
FAQ
What is the clamping voltage of the 1.5KA24HE3/51 under maximum rated surge current?
The 1.5KA24HE3/51 exhibits a maximum clamping voltage (VC) of 34.7 V when subjected to its peak pulse current (IPPM) of 43.2 A using the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during transient events. The 1.5KA24HE3/51 maintains this clamping performance across its full operating temperature range.
Is the 1.5KA24HE3/51 suitable for bidirectional transient protection?
No-the 1.5KA24HE3/51 is a unidirectional TVS diode, intended only for protection against positive-going transients on DC-biased lines. It conducts in forward direction when the cathode exceeds the anode by ~3.5 V, and clamps reverse transients above VBR. For bidirectional protection, a separate part such as 1.5KA24CAHE3/51 would be required. The 1.5KA24HE3/51 datasheet explicitly states "available in uni-directional polarity only."
What does the HE3 suffix indicate on the 1.5KA24HE3/51?
The HE3 suffix on the 1.5KA24HE3/51 designates a RoHS-compliant, high-reliability automotive-grade variant qualified to AEC-Q101. It confirms matte tin-plated leads meeting J-STD-002 solderability, JESD22-B102 wetting balance, and JESD201 Class 2 whisker resistance. The HE3 marking also indicates compliance with UL 94 V-0 flammability and full traceability per Vishay's automotive quality system.
Can the 1.5KA24HE3/51 be used in circuits operating above 125 °C ambient?
Yes-the 1.5KA24HE3/51 is rated for junction temperatures up to +185 °C and has demonstrated stable electrical parameters under high-temperature life testing. Its derating curve (Fig. 2) shows usable pulse power down to 75 % at TJ = 150 °C. When mounted with appropriate thermal relief, the 1.5KA24HE3/51 supports under-hood automotive applications where ambient exceeds 125 °C, provided lead temperature (TL) remains ≤75 °C per Fig. 5.
How does the 1.5KA24HE3/51 compare to standard 1.5KE series TVS diodes?
The 1.5KA24HE3/51 differs from the 1.5KE24A in three key ways: it uses the Case Style 1.5KA package optimized for high-temperature reliability, carries AEC-Q101 qualification, and features the HE3 suffix denoting enhanced whisker resistance and automotive-grade process controls. While both offer 1500 W surge rating, only the 1.5KA24HE3/51 is validated for automotive under-hood deployment per the full AEC-Q101 stress test suite.
1.5KA24HE3/51 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):
- 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
1.5KA24HE3/51 FAQ
1.How can I place an order for 1.5KA24HE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA24HE3/51 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 1.5KA24HE3/51 reliable?
The price and inventory of 1.5KA24HE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA24HE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KA24HE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA24HE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA24HE3/51?
1.5KA24HE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA24HE3/51 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 1.5KA24HE3/51?
For technical support, including 1.5KA24HE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA24HE3/51 requirements.
6.How does Aetrix verify that 1.5KA24HE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KA24HE3/51 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 1.5KA24HE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KA24HE3/51?
All 1.5KA24HE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA24HE3/51, 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 1.5KA24HE3/51 part is unused and in its original packaging.
Return procedure for 1.5KA24HE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA24HE3/51 Tags
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