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Vishay General Semiconductor - Diodes Division 1.5KE22HE3/73
- Part No.:
- 1.5KE22HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE22HE3/73.pdf
- Description:
- TVS DIODE 17.8VWM 31.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,712
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Product details
Overview
1.5KE22HE3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails and signal lines. It features a 22 V breakdown voltage (VBR = 20.9–23.1 V at IT = 1.0 mA), 1500 W peak pulse power (10/1000 µs), clamping voltage of 30.6 V at 49.0 A, and operates from –55 °C to +175 °C. It is used to protect MOSFETs, ICs, and sensor interfaces against inductive switching transients and ESD in industrial power supplies.
For engineers reviewing the 1.5KE22HE3/73 datasheet, 1.5KE22HE3/73 pinout, 1.5KE22HE3/73 application, or 1.5KE22HE3/73 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, AEC-Q101 qualification status, clamping performance curves, and direct alternatives with documented parameter differences - all confirmed from Vishay's official 88301 datasheet revision 09-Aug-2022.
Technical Context
This device implements a glass-passivated silicon p-n junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its unidirectional polarity uses a cathode band marking and exhibits 3.5 V maximum forward voltage at 100 A, enabling effective crowbar-style clamping during surge events without latch-up.
The 1.5KE22HE3/73 adheres to JEDEC case style 1.5KE with axial leads, supports 200 A non-repetitive forward surge current (8.3 ms half-sine), and derates linearly above 25 °C ambient using a 75 °C/W junction-to-ambient thermal resistance - critical for sustained reliability in enclosed power converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1.0 mA - defines precise clamping onset threshold for consistent overvoltage trip point |
| VWM | 18.8 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 30.6 V at 49.0 A - actual clamped voltage during full 1500 W transient, limiting downstream stress |
| PPPM | 1500 W (10/1000 µs) - enables robust protection against IEC 61000-4-5 Level 4 surges |
| IFSM | 200 A (8.3 ms half-sine) - withstands high-energy inrush or fault currents without bond-wire fusing |
| TJ max | +175 °C - supports operation in high-temperature environments such as automotive engine compartments |
| RθJA | 75 °C/W - determines required heatsinking or board copper area for thermal management under sustained power dissipation |
Pinout & Package
Package: JEDEC 1.5KE molded epoxy case with matte tin-plated axial leads (lead length 0.375", 9.5 mm); RoHS-compliant and AEC-Q101 qualified (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential side of protected circuit; enables crowbar action during reverse overvoltage |
| Cathode | Current exit terminal in forward bias; marked with color band | Connected to higher-potential rail (e.g., VIN); defines polarity-sensitive placement on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under humidity and thermal cycling |
| 1500 W peak pulse power | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive power inputs |
| Clamping ratio (VC/VBR) ≈ 1.31 | Minimizes voltage overshoot during transients, reducing stress on downstream MOSFET gate oxides |
| AEC-Q101 qualified | Validated for automotive applications including body control modules and power distribution units |
| Low incremental surge resistance | Reduces energy dissipation during clamping, improving survivability under repetitive surge conditions |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 24 V DC input stage of programmable logic controller (PLC) power supply against load dump and inductive kickback. IC Role / Device Role: Primary overvoltage clamp placed across input terminals upstream of bulk capacitor and regulator. Use Value: Limits transient voltage to ≤30.6 V, preventing damage to 36 V-rated input capacitors and PMICs. | Use Scenario: Safeguarding LIN bus interface ICs in door module ECUs from battery line transients during jump-start or alternator load dump. IC Role / Device Role: Unidirectional TVS connected between LIN line and ground, referenced to vehicle chassis. Use Value: Clamps 100 V/100 ms load dump pulses to <31 V, preserving LIN transceiver integrity per ISO 7637-2 Pulse 5a. |
| Sensor Signal Line Protection | Telecom DC Feeder Protection |
Use Scenario: Shielding analog output of pressure sensor (0–5 V range) from ESD and cable discharge events in HVAC control panels. IC Role / Device Role: Low-capacitance TVS placed directly at connector entry, shunting transients to ground before signal conditioning op-amp. Use Value: Sub-1 ns response ensures clamping occurs before 5 V rail exceeds absolute maximum rating of precision ADC driver. | Use Scenario: Protecting -48 V DC power feeders in telecom base station cabinets from lightning-induced surges on outdoor cabling. IC Role / Device Role: Series-connected 1.5KE22HE3/73 pair (anode-to-anode) providing bidirectional clamping at ±22 V standoff. Use Value: Delivers 1500 W bilateral surge handling while maintaining <31 V clamping in either polarity, meeting Telcordia GR-1089-CORE Zone 3 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | Lower PPPM (600 W), smaller SMB package (surface-mount), VC = 35.5 V @ 16.9 A | Not suitable for 1500 W surge events; limited to PCB space-constrained designs with lower energy threats | Select only when board layout prohibits axial-leaded devices and surge energy is ≤600 W (IEC 61000-4-5 Level 2) |
| 1.5KE22A-E3/54 | Same electrical specs and 1.5KE package, but commercial-grade (non-AEC-Q101) and packaged in tape-and-reel (54 code) | Lacks automotive qualification; acceptable for industrial/commercial power supplies where AEC-Q101 is not mandated | Choose for cost-sensitive non-automotive applications requiring identical performance and through-hole mounting |
Compared with 1.5KE22HE3/73, SMBJ22A offers surface-mount compatibility at reduced surge capacity, while 1.5KE22A-E3/54 matches form, fit, and function but omits AEC-Q101 validation - making the HE3/73 uniquely suited for automotive under-hood deployments requiring both high-energy clamping and qualification traceability.
Availability
1.5KE22HE3/73 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, sensor interface protection, and telecom DC feeder systems requiring stable component supply with guaranteed AEC-Q101 compliance and long-term lifecycle support.
Supply support for 1.5KE22HE3/73 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 diodes, rectifiers, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure due to voltage surges must be eliminated.
FAQ
What is the breakdown voltage tolerance of the 1.5KE22HE3/73?
The 1.5KE22HE3/73 has a specified breakdown voltage range of 20.9 V to 23.1 V at test current IT = 1.0 mA, yielding a ±5% tolerance about the nominal 22 V rating. This tight VBR window ensures predictable clamping behavior across production lots and temperature extremes, critical for protecting 24 V system components without premature conduction.
Is the 1.5KE22HE3/73 suitable for bidirectional transient suppression?
No, the 1.5KE22HE3/73 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional operation, Vishay specifies part numbers ending in "CA" (e.g., 1.5KE22CA). Using the 1.5KE22HE3/73 in reverse-biased AC applications risks permanent failure due to lack of symmetrical clamping capability.
Does the 1.5KE22HE3/73 meet AEC-Q101 qualification?
Yes, the 1.5KE22HE3/73 is explicitly AEC-Q101 qualified per Vishay document 88301, footnote (2), covering devices from 1.5KE6.8AHE3_B to 1.5KE220AHE3_B. This qualification includes stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - confirming suitability for automotive under-hood applications.
What is the maximum clamping voltage of the 1.5KE22HE3/73 during a 1500 W surge?
The 1.5KE22HE3/73 clamps to a maximum of 30.6 V at its rated peak pulse current of 49.0 A (10/1000 µs waveform). This value is measured per standard test conditions and represents the worst-case voltage seen by downstream components during full-rated surge events - essential for verifying margin against IC absolute maximum ratings.
How does the thermal resistance of the 1.5KE22HE3/73 affect PCB layout?
The 1.5KE22HE3/73 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W. To maintain TJ ≤ 175 °C at 6.5 W steady-state dissipation, ambient must stay below 126 °C - impractical without heatsinking. In practice, layout must provide ≥1 cm² of 2-oz copper connected to both leads to reduce RθJA and prevent thermal runaway during repetitive surges.
1.5KE22HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- 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:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE22HE3/73 FAQ
1.How can I place an order for 1.5KE22HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE22HE3/73 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 1.5KE22HE3/73 reliable?
The price and inventory of 1.5KE22HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE22HE3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE22HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE22HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE22HE3/73?
1.5KE22HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE22HE3/73 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 1.5KE22HE3/73?
For technical support, including 1.5KE22HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE22HE3/73 requirements.
6.How does Aetrix verify that 1.5KE22HE3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE22HE3/73 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 1.5KE22HE3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE22HE3/73?
All 1.5KE22HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE22HE3/73, 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 1.5KE22HE3/73 part is unused and in its original packaging.
Return procedure for 1.5KE22HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE22HE3/73 Tags
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