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Vishay General Semiconductor - Diodes Division 1.5KA22HE3/73
- Part No.:
- 1.5KA22HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KA22HE3/73.pdf
- Description:
- TVS DIODE 17.8VWM 31.9VC 1.5KA
- Quantity:
- Payment:
- Shipping:
Inventory:8,861
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Product details
Overview
1.5KA22HE3/73 from Vishay General Semiconductor is a unidirectional automotive-grade transient voltage suppressor (TVS) diode with 1500 W peak pulse power (10/1000 µs), 19.8–24.2 V breakdown voltage, and AEC-Q101 qualification for under-hood electronics protection. It clamps transients to ≤31.9 V at 47 A, operates from –65 °C to +185 °C, and is used in automotive powertrain control units to safeguard MOSFETs and microcontrollers against load-dump and inductive switching surges.
For engineers reviewing the 1.5KA22HE3/73 datasheet, 1.5KA22HE3/73 pinout, 1.5KA22HE3/73 application, or 1.5KA22HE3/73 equivalent, key selection criteria include its 1.5 kW surge rating, 185 °C max junction temperature, RoHS-compliant HE3 packaging, unidirectional polarity, and validated performance under high-temperature reliability stress per AEC-Q101.
Technical Context
This TVS diode employs Vishay's patented PAR® construction for low incremental surge resistance and stable clamping under repetitive transient stress. Its unidirectional configuration provides forward conduction path during overvoltage events while maintaining low leakage (<1 µA at 17.8 V) and fast response time - critical for protecting sensitive gate drivers in 12 V automotive systems.
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 features matte tin-plated leads compliant with J-STD-002 and JESD22-B102. Its UL 94 V-0 molded epoxy case ensures flame resistance in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W (10/1000 µs waveform - sustains load-dump energy without failure) |
| Breakdown Voltage VBR | 19.8–24.2 V at 1 mA - defines precise clamping onset for 24 V system protection |
| Clamping Voltage VC | 31.9 V at 47 A - limits downstream voltage stress on protected ICs |
| Operating Temperature | –65 °C to +185 °C - enables placement near engines or inverters |
| AEC-Q101 Qualified | Automotive-grade reliability - validated for high-temp life testing and thermal cycling |
| RoHS & WEEE Compliant | HE3 suffix confirms lead-free, whisker-resistant finish per JESD201 Class 2 |
Pinout & Package
Package: Case Style 1.5KA - axial-leaded, molded epoxy body (UL 94 V-0), 0.375" (9.5 mm) lead length, 0.210" (5.3 mm) body diameter. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during clamping | Connected to protected circuit ground or low-side return path |
| Cathode | Current exit during clamping | Connected to protected line (e.g., battery rail or signal input) |
Key Features
| Feature | Design Value |
|---|---|
| Patented PAR® construction | Reduces dynamic impedance during surge, enabling tighter clamping and lower let-through energy |
| 1500 W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump) up to 120 V without degradation |
| 185 °C maximum junction temperature | Supports direct mounting on high-heat PCB areas near power stages |
| Matte tin-plated leads | Ensures reliable solder joint formation and long-term intermetallic stability |
| Unidirectional polarity only | Simplifies layout for DC-biased rails where reverse conduction is not required |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Power Stage |
|---|---|
Use Scenario: Protecting MCU I/O and gate driver inputs from inductive kickback during solenoid actuation in diesel common-rail systems. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between 12 V supply rail and protected IC pins. Use Value: Clamps 100 V/100 ms load dump to ≤31.9 V, preventing latch-up or oxide rupture in 3.3 V logic interfaces. | Use Scenario: Safeguarding isolated gate drivers in 48 V BLDC motor inverters exposed to back-EMF spikes. IC Role / Device Role / Timing Role: Unidirectional TVS connected across half-bridge high-side FET source-drain terminals. Use Value: Limits voltage overshoot to <32 V during 200 A turn-off events, preserving SiC MOSFET gate oxide integrity. |
| Telecom Base Station Power Input | Automotive ADAS Camera Module |
Use Scenario: Front-end protection of 48 V telecom rectifier outputs against lightning-induced surges on outdoor lines. IC Role / Device Role / Timing Role: Primary surge clamp on DC input before DC/DC converters. Use Value: Absorbs 1500 W pulses without derating at 85 °C ambient, meeting IEC 61000-4-5 Level 4. | Use Scenario: Shielding MIPI CSI-2 data lines and power rails in rear-view camera modules mounted near exhaust systems. IC Role / Device Role / Timing Role: Point-of-load TVS on 5 V imaging sensor supply and 1.8 V serializer core rail. Use Value: Operates reliably at 125 °C junction temperature while clamping ESD ±30 kV contact discharge per ISO 10605. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/5AT | Lower 400 W rating, SMA package, 22 V nominal VBR, 35.5 V clamping at 11.3 A | Not AEC-Q101 qualified; limited to commercial-temperature industrial use | Select when space-constrained SMT layout is required and surge energy is ≤400 W |
| 1.5KE22A | Same 1500 W rating but TO-204AA (DO-41) package, no HE3 whisker resistance, 150 °C TJ max | Lacks automotive qualification and high-temp reliability validation | Choose for cost-sensitive non-automotive designs where 185 °C operation is unnecessary |
Compared with SMAJ22A-E3/5AT and 1.5KE22A, the 1.5KA22HE3/73 delivers superior thermal robustness (185 °C vs. 150–175 °C), AEC-Q101 compliance, and proven high-temperature lifetime - making it the only choice for under-hood automotive deployments requiring zero field failures.
Availability
1.5KA22HE3/73 is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, telecom base station power inputs, and ADAS camera modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1.5KA22HE3/73 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, optoelectronics, and passive components for demanding industrial and automotive applications.
The 1.5KA series was engineered specifically for automotive transient suppression - combining AEC-Q101 qualification, high-temperature silicon design, and PAR® technology to meet ISO 7637-2 and ISO 16750-2 requirements in powertrain and chassis systems.
FAQ
What is the clamping voltage of the 1.5KA22HE3/73 at its rated peak pulse current?
The 1.5KA22HE3/73 has a maximum clamping voltage (VC) of 31.9 V at 47 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for downstream 24 V-rated components. The 1.5KA22HE3/73 maintains this clamping performance across its full operating temperature range.
Is the 1.5KA22HE3/73 suitable for bidirectional transient protection?
No, the 1.5KA22HE3/73 is unidirectional only, as confirmed in the Vishay datasheet Document Number 88300. It conducts in reverse bias during overvoltage events but does not protect against positive transients on grounded lines. For bidirectional applications, a separate symmetric TVS or dual-diode configuration is required. The 1.5KA22HE3/73 polarity is marked by a cathode band.
Does the 1.5KA22HE3/73 meet AEC-Q101 requirements for automotive use?
Yes, the 1.5KA22HE3/73 is explicitly AEC-Q101 qualified per the datasheet notes and ordering information. Its HE3 suffix denotes high-reliability, automotive-grade construction including JESD201 Class 2 whisker resistance, 260 °C solder dip tolerance, and validation across temperature cycling, high-temperature operating life, and mechanical shock tests. This makes the 1.5KA22HE3/73 appropriate for engine bay and transmission control applications.
What is the maximum junction temperature rating for the 1.5KA22HE3/73?
The 1.5KA22HE3/73 has a maximum junction temperature (TJ) of +185 °C, significantly higher than standard TVS diodes (typically 150 °C). This enables direct placement near heat sources such as power MOSFETs or ignition coils without thermal derating. The 1.5KA22HE3/73 retains full electrical specifications up to this limit, supporting under-hood deployment in modern turbocharged and hybrid powertrains.
How does the PAR® construction benefit the 1.5KA22HE3/73 in surge suppression?
Vishay's patented PAR® (Planar Avalanche Rectifier) construction in the 1.5KA22HE3/73 delivers lower dynamic impedance and more stable avalanche characteristics during high-current transients. This results in tighter clamping voltage control, reduced let-through energy, and improved consistency across temperature and aging - critical for protecting sensitive gate drivers and microcontrollers in automotive safety-critical systems. The 1.5KA22HE3/73 leverages PAR® to achieve its 1500 W rating with minimal voltage overshoot.
1.5KA22HE3/73 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):
- 17.8V
- Voltage - Breakdown (Min):
- 19.8V
- Voltage - Clamping (Max) @ Ipp:
- 31.9V
- Current - Peak Pulse (10/1000µs):
- 47A
- 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
1.5KA22HE3/73 FAQ
1.How can I place an order for 1.5KA22HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KA22HE3/73 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 1.5KA22HE3/73 reliable?
The price and inventory of 1.5KA22HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KA22HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KA22HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KA22HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KA22HE3/73?
1.5KA22HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KA22HE3/73 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 1.5KA22HE3/73?
For technical support, including 1.5KA22HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KA22HE3/73 requirements.
6.How does Aetrix verify that 1.5KA22HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KA22HE3/73 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 1.5KA22HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KA22HE3/73?
All 1.5KA22HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KA22HE3/73, 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 1.5KA22HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KA22HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KA22HE3/73 Tags
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