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Vishay General Semiconductor - Diodes Division 1.5KA24HE3/54
- Part No.:
- 1.5KA24HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA24HE3/54.pdf
- Description:
- TVS DIODE 19.4VWM 34.7VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:7,368
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Product details
Overview
1.5KA24HE3/54 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode designed for high-energy surge protection in harsh environments. It delivers 1500 W peak pulse power (10/1000 µs), clamps at ≤34.7 V under 43.2 A peak pulse current, and operates up to +185 °C junction temperature - deployed in engine control units, ABS modules, and powertrain sensor interfaces.
For engineers reviewing the 1.5KA24HE3/54 datasheet, 1.5KA24HE3/54 pinout, 1.5KA24HE3/54 application, or 1.5KA24HE3/54 equivalent, key selection criteria include AEC Q101 qualification, 21.6–26.4 V breakdown range, low 0.094 %/°C VBR tempco, and RoHS-compliant HE3 packaging with JESD201 Class 2 whisker resistance.
Technical Context
This TVS diode uses patented PAR® construction for stable clamping under repetitive transients and features a molded epoxy case rated UL 94 V-0. Its unidirectional polarity and 19.4 V stand-off voltage enable robust protection of 24 V automotive supply rails against load dump and inductive switching spikes.
Designed for high-reliability automotive applications, it supports 200 A non-repetitive forward surge (8.3 ms half-sine) and maintains <1 µA reverse leakage at 19.4 V up to 150 °C - critical for long-term operation in under-hood electronics without thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains ISO 7637-2 Pulse 5a load dump surges without failure |
| Breakdown Voltage VBR | 21.6–26.4 V @ 1 mA - ensures reliable triggering above 24 V nominal rail while avoiding false trips |
| Clamping Voltage VC | ≤34.7 V @ 43.2 A - limits downstream IC voltage stress during worst-case transients |
| Operating Temperature Range | −65 °C to +185 °C - validated for under-hood placement per AEC Q101 requirements |
| RoHS & Reliability | HE3 suffix: RoHS-compliant, JESD201 Class 2 whisker tested, AEC Q101 qualified |
| Surge Current IPPM | 43.2 A (10/1000 µs) - matches typical automotive CAN/LIN bus and sensor line surge profiles |
Pinout & Package
Case Style 1.5KA: axial-leaded DO-201AD package with matte tin-plated leads; cathode indicated by color band; body dimensions 10.0 × 5.3 mm (L × Ø), lead length 9.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-side return path for unidirectional clamping |
| Cathode | Protected line terminal | Connected to 24 V supply rail or signal line; absorbs positive transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables stable VBR and low dynamic impedance across temperature and lifetime |
| 1500 W peak pulse rating | Meets ISO 7637-2 Pulse 5a (load dump) immunity requirements for 24 V systems |
| AEC Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| Low incremental surge resistance | Minimizes clamping overshoot during fast-rising transients (e.g., relay coil flyback) |
Applications
| Engine Control Unit (ECU) Power Input | ABS Hydraulic Control Unit |
|---|---|
Use Scenario: Protects 24 V main power input of diesel/gasoline ECUs from alternator load dump and battery disconnect transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery rail and input filter capacitor. Use Value: Limits voltage to ≤34.7 V during 1500 W surges, preventing damage to MCU power management ICs and analog front-ends. | Use Scenario: Shields solenoid driver circuits and position sensor interfaces in ABS modules from inductive kickback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V solenoid supply lines and LIN bus termination points. Use Value: Fast response (<1 ns) and low clamping voltage preserve signal integrity and prevent latch-up in precision analog comparators. |
| Transmission Control Module (TCM) | Body Control Module (BCM) Lighting Drivers |
Use Scenario: Safeguards TCM microcontroller power and CAN transceiver VCC rails against cranking transients and relay noise. IC Role / Device Role / Timing Role: Secondary protection stage after bulk input capacitance, before LDO regulators. Use Value: 185 °C max junction rating enables direct mounting near transmission-mounted electronics without derating. | Use Scenario: Protects LED driver ICs and MOSFET gate drivers in BCM-controlled headlight and fog lamp circuits. IC Role / Device Role / Timing Role: Line-to-ground clamp on switched 24 V outputs driving high-current LED loads. Use Value: 200 A peak forward surge rating withstands repeated hot-swap events during lamp replacement diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24AHE3/52 | Lower 600 W PPPM rating; SMA package (smaller footprint); 24 V nominal VBR but tighter tolerance (22.8–25.2 V) | Targeted at space-constrained PCBs with lower energy threat profiles (e.g., interior modules) | Select when board area is limited and surge exposure is below ISO 7637-2 Pulse 5a severity |
| 1.5KE24A | Same 1500 W PPPM but TO-204AA (DO-41) package; not AEC Q101 qualified; higher 0.105 %/°C VBR tempco | Intended for industrial/commercial 24 V systems without automotive qualification requirements | Choose only for non-automotive designs where qualification and high-temp stability are not mandatory |
Compared with SMBJ24AHE3/52 and 1.5KE24A, the 1.5KA24HE3/54 uniquely combines AEC Q101 qualification, 185 °C operation, and DO-201AD mechanical robustness - making it the sole choice for under-hood 24 V power rail protection where reliability and thermal margin are non-negotiable.
Availability
1.5KA24HE3/54 is available at Aetrix Electronics and suitable for engine control units, ABS hydraulic control units, transmission control modules, and body control module lighting drivers requiring stable component supply across extended automotive production lifecycles.
Supply support for 1.5KA24HE3/54 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, rectifiers, and protection devices for automotive, industrial, and computing markets.
The 1.5KA series was engineered specifically for AEC Q101-compliant transient suppression in 24 V automotive power systems - emphasizing thermal stability, surge endurance, and long-term parametric consistency under vibration and thermal cycling.
FAQ
What is the breakdown voltage range of the 1.5KA24HE3/54?
The 1.5KA24HE3/54 has a guaranteed breakdown voltage (VBR) range of 21.6 V to 26.4 V at 1 mA test current, measured per ANSI/IEEE C62.35. This range ensures reliable activation above nominal 24 V system voltage while maintaining margin against false triggering due to ripple or noise - a critical requirement for robust operation in automotive power distribution networks.
Is the 1.5KA24HE3/54 qualified for automotive use?
Yes, the 1.5KA24HE3/54 is AEC Q101 qualified and designated as high-reliability/automotive grade (Base P/N HE3). It undergoes rigorous stress testing including temperature cycling, high-temperature operating life, and mechanical shock - confirming suitability for under-hood applications such as engine control units and ABS modules where ambient temperatures exceed 125 °C.
What does the HE3 suffix mean on the 1.5KA24HE3/54?
On the 1.5KA24HE3/54, the HE3 suffix indicates RoHS compliance, high-reliability construction, and qualification to JESD201 Class 2 for tin whisker resistance. It also confirms AEC Q101 qualification and matte tin-plated leads solderable per J-STD-002 and JESD22-B102 - essential for long-term reliability in automotive assembly and field operation.
What is the maximum clamping voltage of the 1.5KA24HE3/54 during surge events?
The 1.5KA24HE3/54 exhibits 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 conditions and defines the upper voltage limit imposed on protected circuitry during worst-case transients - enabling safe interface with 36 V tolerant automotive ICs and power management devices.
Can the 1.5KA24HE3/54 be used in 12 V automotive systems?
No, the 1.5KA24HE3/54 is specifically designed for 24 V nominal systems. Its 19.4 V stand-off voltage (VWM) and 21.6–26.4 V breakdown range make it unsuitable for 12 V rails, where premature conduction or insufficient margin would occur. For 12 V applications, Vishay offers dedicated variants such as 1.5KA12HE3/54 or SMBJ12AHE3/52.
1.5KA24HE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- 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
1.5KA24HE3/54 FAQ
1.How can I place an order for 1.5KA24HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA24HE3/54 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 1.5KA24HE3/54 reliable?
The price and inventory of 1.5KA24HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA24HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KA24HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA24HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA24HE3/54?
1.5KA24HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA24HE3/54 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 1.5KA24HE3/54?
For technical support, including 1.5KA24HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA24HE3/54 requirements.
6.How does Aetrix verify that 1.5KA24HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KA24HE3/54 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 1.5KA24HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KA24HE3/54?
All 1.5KA24HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA24HE3/54, 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 1.5KA24HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KA24HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA24HE3/54 Tags
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