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Vishay General Semiconductor - Diodes Division 1.5KA24AHE3/73
- Part No.:
- 1.5KA24AHE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA24AHE3/73.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:6,418
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Product details
Overview
1.5KA24AHE3/73 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode designed for high-energy surge protection in harsh environments. It delivers 1500 W peak pulse power (10/1000 µs), clamps at 33.2 V under 45.2 A surge current, and operates up to +185 °C junction temperature - enabling robust protection of MOSFETs and sensor signal lines in automotive powertrain control units.
For engineers reviewing the 1.5KA24AHE3/73 datasheet, 1.5KA24AHE3/73 pinout, 1.5KA24AHE3/73 application, or 1.5KA24AHE3/73 equivalent, key selection criteria include its AEC-Q101 qualification, 22.8–25.2 V breakdown range, 20.5 V stand-off voltage, low 0.094 %/°C VBR tempco, and RoHS-compliant HE3 packaging with JESD201 Class 2 whisker resistance.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for stable clamping under repetitive transients and high-temperature operation. Its unidirectional polarity, 10/1000 µs waveform compliance per ANSI/IEEE C62.35, and 3.5 V max forward voltage at 100 A support fast, low-loss surge diversion in DC power rails and signal paths.
The device is rated for 200 A non-repetitive 8.3 ms half-sine surge (IFSM), features 1.0 µA max reverse leakage at VWM, and maintains clamping performance across -65 °C to +185 °C operating range - meeting requirements for under-hood automotive electronics exposed to thermal cycling and load dump events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - handles ISO 7637-2 Load Dump and ISO 16750-2 surge pulses without failure |
| Breakdown Voltage (VBR) | 22.8–25.2 V at 1.0 mA - ensures reliable triggering above system nominal voltage (e.g., 24 V automotive) |
| Clamping Voltage (VC) | 33.2 V at 45.2 A - limits downstream IC voltage stress during worst-case transients |
| Stand-off Voltage (VWM) | 20.5 V - provides 15% margin below min VBR, preventing false triggering during normal operation |
| Junction Temperature Range | -65 °C to +185 °C - supports placement near engines or inverters without derating loss |
| Surge Current (IPPM) | 45.2 A (10/1000 µs) - validates protection capability against 1500 W energy bursts |
| Tempco of VBR | 0.094 %/°C - minimizes voltage drift over temperature, critical for precision clamping stability |
Pinout & Package
Package: Case Style 1.5KA - molded epoxy body with UL 94 V-0 rating, matte tin-plated leads solderable per J-STD-002/JESD22-B102, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected circuit ground | Completes surge current path to ground during transient; must be routed with minimal inductance |
| Cathode | High-side connection to protected line (e.g., 24 V rail) | Accepts positive-going transients; color band identifies this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Enables consistent clamping performance across 1000+ surge cycles without parameter shift |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| 1500 W peak pulse power | Meets ISO 7637-2 Level V (load dump) and ISO 16750-2 test requirements for 24 V systems |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth in high-reliability applications, eliminating latent field failures |
| Low incremental surge resistance | Reduces clamping voltage overshoot during fast-rising transients (<1 ns rise time) |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Power Supply |
|---|---|
Use Scenario: Protecting microcontroller I/O and CAN transceiver power rails from alternator load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between 24 V supply and ground, triggered within <1 ns to limit voltage to ≤33.2 V. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V logic and CAN PHY ICs during 120 V/100 ms load dump events. | Use Scenario: Safeguarding gate drivers and current sense amplifiers in 24–48 V DC bus sections of servo drives. IC Role / Device Role / Timing Role: Primary surge suppression on auxiliary 24 V bias rail feeding isolated gate drivers and op-amps. Use Value: Maintains functional safety integrity by limiting transient overvoltage to levels below IEC 61800-3 immunity thresholds. |
| Commercial Vehicle Telematics Module | Off-Highway Equipment Battery Management |
Use Scenario: Shielding GNSS receiver RF front-end and cellular modem power inputs from battery line transients. IC Role / Device Role / Timing Role: Standoff-rated TVS (20.5 V) placed upstream of LDO regulators to absorb coupled noise before regulation. Use Value: Eliminates GPS position drift and LTE reconnection drops caused by sub-100 ns ESD-like spikes on vehicle power bus. | Use Scenario: Protecting BMS analog front-end (AFE) inputs measuring cell voltages in 24 V lead-acid or LiFePO4 stacks. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA @ VWM) TVS on differential voltage sense lines to avoid measurement offset. Use Value: Preserves ±1 mV sensing accuracy while surviving repeated 100 V/40 ms jump-start surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24AHE3/A | 600 W rating, SMA package, lower IPPM (27.5 A), same VBR range (22.8–25.2 V) | Not AEC-Q101 qualified; limited to consumer/industrial ambient (TJ max = 150 °C) | Select when cost sensitivity outweighs automotive reliability requirements and surge energy is ≤600 W |
| 1.5KE24A | Same 1500 W rating but TO-204AA (DO-4) package, no HE3 whisker qualification, TJ max = 175 °C | Lacks AEC-Q101 validation and JESD201 Class 2 compliance; not approved for new automotive designs | Use only for legacy industrial replacements where HE3-level reliability is not mandated |
Compared with SMAJ24AHE3/A and 1.5KE24A, the 1.5KA24AHE3/73 provides higher thermal robustness (+185 °C), automotive-grade process controls, and verified whisker resistance - making it the sole choice for new AEC-Q101-compliant 24 V system designs requiring long-term field reliability.
Availability
1.5KA24AHE3/73 is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drive power supplies, commercial vehicle telematics modules, and off-highway equipment battery management systems requiring stable component supply across extended product lifecycles.
Supply support for 1.5KA24AHE3/73 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, rectifiers, and protection devices for demanding industrial and automotive applications.
The 1.5KA series was engineered specifically for AEC-Q101-compliant transient suppression in 24 V automotive power networks, emphasizing thermal stability, surge endurance, and process-controlled whisker resistance.
FAQ
What is the maximum clamping voltage of the 1.5KA24AHE3/73 under specified surge conditions?
The 1.5KA24AHE3/73 has a maximum clamping voltage (VC) of 33.2 V at 45.2 A peak pulse current with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream components see no more than 33.2 V during standardized surge events - critical for protecting 3.3 V or 5 V logic interfaces powered from a 24 V rail.
Is the 1.5KA24AHE3/73 qualified to AEC-Q101 standards?
Yes, the 1.5KA24AHE3/73 is explicitly AEC-Q101 qualified, as confirmed by Vishay's documentation (Document Number 88300, Revision 20-Oct-08) and its HE3 suffix designation. This qualification covers temperature cycling, high-temperature operating life, and mechanical shock testing - validating its suitability for under-hood automotive applications.
What does the HE3 suffix indicate for the 1.5KA24AHE3/73?
The HE3 suffix on the 1.5KA24AHE3/73 denotes RoHS-compliant, high-reliability automotive grade construction: matte tin-plated leads compliant with J-STD-002 and JESD22-B102, and passing JESD201 Class 2 whisker testing. It also confirms AEC-Q101 qualification and UL 94 V-0 molding compound compliance.
Can the 1.5KA24AHE3/73 be used in bidirectional configurations?
No, the 1.5KA24AHE3/73 is unidirectional only, as stated in Vishay's official features list. Its internal structure and polarity marking (cathode band) support protection against positive transients only. For bidirectional protection, two 1.5KA24AHE3/73 devices must be connected in series opposition - though Vishay offers dedicated bidirectional variants like 1.5KA24CAHE3/73.
What is the standoff voltage (VWM) and why is it important for the 1.5KA24AHE3/73?
The 1.5KA24AHE3/73 has a standoff voltage (VWM) of 20.5 V, meaning it remains non-conductive below this voltage. This 15% margin below minimum VBR (22.8 V) prevents false triggering during normal 24 V system operation - including cold-crank dips and ripple - ensuring reliable protection only during actual overvoltage events.
1.5KA24AHE3/73 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):
- 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
1.5KA24AHE3/73 FAQ
1.How can I place an order for 1.5KA24AHE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA24AHE3/73 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 1.5KA24AHE3/73 reliable?
The price and inventory of 1.5KA24AHE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA24AHE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KA24AHE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA24AHE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA24AHE3/73?
1.5KA24AHE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA24AHE3/73 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 1.5KA24AHE3/73?
For technical support, including 1.5KA24AHE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA24AHE3/73 requirements.
6.How does Aetrix verify that 1.5KA24AHE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KA24AHE3/73 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 1.5KA24AHE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KA24AHE3/73?
All 1.5KA24AHE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA24AHE3/73, 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 1.5KA24AHE3/73 part is unused and in its original packaging.
Return procedure for 1.5KA24AHE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA24AHE3/73 Tags
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