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Vishay General Semiconductor - Diodes Division 1.5KE22AHE3/51
- Part No.:
- 1.5KE22AHE3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE22AHE3/51.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,789
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Product details
Overview
1.5KE22AHE3/51 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection of DC power rails and signal lines. It features a 22 V breakdown voltage (VBR = 20.9–23.1 V at 1 mA), 30.6 V maximum clamping voltage (VC) at 49 A peak pulse current, 1500 W peak pulse power rating (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability in engine control units and body electronics.
For engineers reviewing the 1.5KE22AHE3/51 datasheet, 1.5KE22AHE3/51 pinout, 1.5KE22AHE3/51 application, or 1.5KE22AHE3/51 equivalent, this device serves as a robust, fast-response (≤1 ns) surge protector for 24 V industrial I/O, automotive sensor interfaces, and DC-DC converter input stages where precise clamping and low leakage (<1 µA at 18.8 V) are critical.
Technical Context
This TVS diode operates as a uni-directional avalanche clamp with glass-passivated junction construction, enabling stable breakdown behavior and low incremental surge resistance. Its 1.5KE package supports high thermal dissipation (RθJL = 15.4 °C/W) and withstands 200 A non-repetitive forward surge (8.3 ms half-sine).
Designed for transient suppression per IEC 61000-4-5 (lightning) and ISO 7637-2 (automotive load dump), it delivers consistent clamping performance across -55 °C to +175 °C junction temperature, with temperature coefficient of VBR at +0.092 %/°C and VF ≤ 3.5 V at 100 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 20.9–23.1 V at 1 mA - defines precise turn-on threshold for reliable overvoltage triggering |
| Stand-off Voltage VWM | 18.8 V - ensures no conduction during normal 24 V rail operation with margin |
| Max Clamping Voltage VC | 30.6 V at 49 A (10/1000 µs) - limits downstream IC stress to safe levels during surge events |
| Peak Pulse Power PPPM | 1500 W - sustains high-energy transients like ISO 7637-2 Pulse 5a without failure |
| Leakage Current ID | <1 µA at 18.8 V - prevents measurable power loss or false triggering in standby systems |
| Junction Temperature Range | -55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments |
| AEC-Q101 Qualified | Yes - validated for automotive applications including ECU, ADAS sensors, and infotainment power supplies |
Pinout & Package
Package: Case Style 1.5KE - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, RoHS compliant, and qualified to JESD 201 Class 2 whisker test (HE3 suffix). Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connects to protected circuit ground or low-side return path; enables surge current shunting to reference plane |
| Cathode | Current exit point during reverse-biased clamping | Connects to line being protected (e.g., 24 V supply); avalanche breakdown occurs between cathode and anode when VIN exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable breakdown voltage and long-term reliability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Handles automotive load dump and lightning-induced surges without degradation |
| Response time ≤1 ns | Clamps before sensitive ICs experience damaging overvoltage-critical for microcontrollers and CAN transceivers |
| AEC-Q101 qualification | Validated for automotive use including vibration, temperature cycling, and humidity testing per JEDEC standards |
| Low incremental surge resistance | Minimizes VC overshoot during high di/dt events, improving protection margin for downstream components |
Applications
| Automotive Engine Control Unit (ECU) | Industrial 24 V Sensor Interface |
|---|---|
Use Scenario: Protection of 24 V supply input against load dump transients (ISO 7637-2 Pulse 5a) in diesel/gasoline ECUs. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and microcontroller power rails. Use Value: Limits voltage to ≤30.6 V during 1500 W surges, preventing latch-up or gate oxide damage in 3.3 V/5 V logic and analog front-ends. |
Use Scenario: Shielding RS-485/422 transceivers and analog sensor inputs (e.g., pressure, temperature) on factory floor PLC I/O modules. IC Role / Device Role / Timing Role: Fast-acting shunt protector on field-side signal and power lines exposed to inductive switching noise. Use Value: Sub-1 ns response clamps 2 kV ESD (IEC 61000-4-2) and 1 kV surge (IEC 61000-4-5) while maintaining <1 µA leakage at 18.8 V operating voltage. |
| Telecom Remote Power Feeding | Consumer Appliance Motor Drive |
Use Scenario: Safeguarding PoE-like 24–48 V DC power feeds to remote base stations or outdoor cameras against induced lightning surges. IC Role / Device Role / Timing Role: Line-side TVS on feed input, coordinated with upstream MOVs and gas discharge tubes for staged protection. Use Value: 1500 W rating and 30.6 V clamping enable robust coordination with secondary protection, reducing let-through energy to <10 mJ. |
Use Scenario: Protecting microcontroller GPIOs and gate drivers in washing machine or HVAC motor control boards from back-EMF spikes. IC Role / Device Role / Timing Role: Localized clamp on MOSFET gate drive lines and MCU reset/power monitoring pins. Use Value: Low VF (≤3.5 V at 100 A) and 200 A IFSM rating allow safe absorption of repetitive inductive kickback without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | Lower PPPM (600 W), smaller SMB package (RθJA = 110 °C/W), same VBR range (20.9–23.1 V) | Better suited for space-constrained consumer PCBs; insufficient for automotive load dump | Select when board area is limited and surge energy is ≤600 W (e.g., USB-C PD protection) |
| 1.5KE22CA | Bi-directional variant (symmetrical clamping), identical VBR, VC, and PPPM | Required for AC-coupled or bidirectional signal lines (e.g., CAN bus, RS-485 differential pairs) | Choose only if protecting balanced or alternating-polarity signals; not interchangeable for DC rail protection |
Compared with SMBJ22A and 1.5KE22CA, the 1.5KE22AHE3/51 provides higher surge endurance (1500 W vs. 600 W) and superior thermal management (RθJL = 15.4 °C/W) for demanding automotive and industrial DC power protection, while its uni-directional polarity ensures optimal clamping on positive-rail applications without unnecessary complexity.
Availability
1.5KE22AHE3/51 is available at Aetrix Electronics and suitable for automotive engine control units, industrial 24 V sensor interfaces, and telecom remote power feeding requiring stable component supply, AEC-Q101 compliance, and high-energy transient immunity.
Supply support for 1.5KE22AHE3/51 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 automotive, industrial, and computing markets.
The 1.5KE series was engineered specifically for high-power transient suppression in harsh environments, targeting automotive powertrain, body electronics, and industrial automation systems where robustness and AEC-Q101 validation are mandatory.
FAQ
What is the breakdown voltage tolerance of the 1.5KE22AHE3/51?
The 1.5KE22AHE3/51 has a specified breakdown voltage range of 20.9 V to 23.1 V at 1 mA test current, representing a ±5 % tolerance around the nominal 22 V rating. This tight VBR window ensures predictable clamping onset across production lots and temperature extremes, critical for protecting 24 V systems where overvoltage margins are narrow. The 1.5KE22AHE3/51 maintains this specification per Vishay Document 88301, Revision 11-Oct-16.
Is the 1.5KE22AHE3/51 suitable for protecting CAN bus lines?
No-the 1.5KE22AHE3/51 is a uni-directional TVS diode and therefore inappropriate for differential, bidirectional signaling such as CAN bus. For CAN FD or classical CAN protection, a bi-directional variant like 1.5KE22CA is required to clamp both positive and negative transients symmetrically. Using the 1.5KE22AHE3/51 on CAN lines would leave the negative swing unprotected and risk communication failure. Always verify polarity alignment before deploying the 1.5KE22AHE3/51.
Does the 1.5KE22AHE3/51 meet AEC-Q101 requirements?
Yes-the 1.5KE22AHE3/51 carries the HE3 suffix, which explicitly denotes AEC-Q101 qualification per Vishay's ordering information and notes on page 3 of Document 88301. This includes stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life-validating its suitability for automotive under-hood and chassis applications. The 1.5KE22AHE3/51 is certified for use in ECUs, ADAS sensors, and body control modules.
What is the maximum clamping voltage of the 1.5KE22AHE3/51 at rated surge current?
The 1.5KE22AHE3/51 exhibits a maximum clamping voltage (VC) of 30.6 V when subjected to its rated peak pulse current of 49 A under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees that downstream components see no more than 30.6 V during worst-case surge events. The 1.5KE22AHE3/51 achieves this with low incremental resistance, ensuring minimal voltage overshoot beyond VBR.
How does the 1.5KE22AHE3/51 compare to the 1N6279A in terms of specifications and usage?
The 1.5KE22AHE3/51 and 1N6279A are functionally identical devices-both are uni-directional 22 V TVS diodes from Vishay's 1.5KE family, sharing identical electrical characteristics including VBR, VC, PPPM, and thermal ratings. The "1N6279A" is the legacy JEDEC-type designation, while "1.5KE22AHE3/51" reflects the commercial-grade, RoHS-compliant, AEC-Q101-qualified part with tape-and-reel packaging (51 = 13" reel, 1400 pcs). Engineers may use them interchangeably in design, but the 1.5KE22AHE3/51 offers enhanced traceability and automotive qualification.
1.5KE22AHE3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 49A
- 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
1.5KE22AHE3/51 FAQ
1.How can I place an order for 1.5KE22AHE3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE22AHE3/51 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 1.5KE22AHE3/51 reliable?
The price and inventory of 1.5KE22AHE3/51 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE22AHE3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE22AHE3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE22AHE3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE22AHE3/51?
1.5KE22AHE3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE22AHE3/51 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 1.5KE22AHE3/51?
For technical support, including 1.5KE22AHE3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE22AHE3/51 requirements.
6.How does Aetrix verify that 1.5KE22AHE3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE22AHE3/51 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 1.5KE22AHE3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE22AHE3/51?
All 1.5KE22AHE3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE22AHE3/51, 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 1.5KE22AHE3/51 part is unused and in its original packaging.
Return procedure for 1.5KE22AHE3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE22AHE3/51 Tags
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