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Vishay General Semiconductor - Diodes Division P4KE18HE3/73
- Part No.:
- P4KE18HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE18HE3/73.pdf
- Description:
- TVS DIODE 14.5VWM 26.5VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,257
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Product details
Overview
P4KE18HE3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for circuit protection against ESD and inductive switching transients. It features 18 V breakdown voltage (VBR min/max: 17.1–18.9 V), 15.3 V stand-off voltage (VWM), 25.2 V clamping voltage (VC) at 15.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed on power rails and signal lines of automotive sensor modules.
For engineers reviewing the P4KE18HE3/73 datasheet, P4KE18HE3/73 pinout, P4KE18HE3/73 application, or P4KE18HE3/73 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-41 mechanical data, clamping performance under surge conditions, and direct alternatives for board-level transient protection design.
Technical Context
The P4KE18HE3/73 operates as a unidirectional avalanche diode, triggering conduction when reverse voltage exceeds its specified breakdown range (17.1–18.9 V at 1.0 mA test current). Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 μA at 15.3 V).
It delivers 25.2 V clamping voltage at 15.9 A peak pulse current (10/1000 μs), with thermal resistance RθJL = 66 °C/W and maximum junction temperature of +175 °C. The device meets AEC-Q101 stress testing requirements and supports soldering per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at 1.0 mA - defines precise avalanche initiation window for reliable overvoltage detection |
| VWM | 15.3 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 25.2 V at 15.9 A - clamped voltage during 10/1000 μs surge, limiting downstream IC stress |
| PPPM | 400 W - peak transient power handling capability under standardized surge waveform |
| TJ max. | +175 °C - enables operation in under-hood automotive environments and industrial enclosures |
| RθJL | 66 °C/W - thermal resistance from junction to lead, critical for PCB copper pour sizing and thermal relief design |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
DO-41 (DO-204AL) molded epoxy package with matte tin-plated leads; cathode indicated by color band on body; compliant with UL 94 V-0 flammability rating and RoHS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Avalanche conduction terminal | Marked end; connected to protected line (e.g., 12 V rail or CAN_H) to clamp positive transients |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter consistency across temperature and life cycles |
| 400 W peak pulse power (10/1000 μs) | Supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges in automotive ECUs |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control, ADAS sensors, and body electronics |
| Low clamping ratio (VC/VBR ≈ 1.41) | Minimizes overvoltage exposure to downstream MOSFETs or microcontrollers during transient events |
| Matte tin-plated leads | Enables reliable solderability per J-STD-002 and compatibility with lead-free reflow profiles |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines in engine control units exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input to clamp transients above 15.3 V. Use Value: Limits voltage seen by downstream regulators to ≤25.2 V during 15.9 A surge, preventing latch-up or damage. | Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) of pressure sensors in factory automation. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt ESD and cable discharge events. Use Value: Sub-1 ns response time suppresses >8 kV contact ESD per IEC 61000-4-2 without affecting 20 kHz signal bandwidth. |
| Consumer Device USB Port Protection | Telecom Line Card Surge Suppression |
Use Scenario: Adding secondary overvoltage protection on VBUS line of USB-C ports in portable medical monitors. IC Role / Device Role / Timing Role: Secondary clamping device after primary polymer PTC, triggered only during high-energy surges. Use Value: Clamps 400 W transients while maintaining <1.0 μA leakage at 15.3 V, avoiding standby current drain. | Use Scenario: Front-end protection for Ethernet PHY interfaces on telecom base station line cards. IC Role / Device Role / Timing Role: Unidirectional TVS on MDI pair to absorb lightning-induced surges coupled onto twisted-pair cabling. Use Value: Withstands repetitive 10/1000 μs surges up to 400 W at 0.01% duty cycle without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | DO-214AA package; 18 V VBR; 600 W PPPM; higher IPPM (32.4 A); larger footprint | Preferred where higher surge margin is required and board space allows SMB footprint | Select SMBJ18A when system-level surge testing exceeds 400 W or when thermal mass from larger package improves reliability |
| 1.5KE18A | Same DO-41 package; identical VBR/VWM/VC; 1500 W PPPM; higher IPPM (83.3 A); non-AEC-Q101 | Used in industrial/commercial equipment where automotive qualification is not mandated | Choose 1.5KE18A for cost-sensitive non-automotive designs requiring higher single-pulse energy absorption |
Compared with SMBJ18A and 1.5KE18A, the P4KE18HE3/73 offers AEC-Q101 qualification in the compact DO-41 form factor with balanced 400 W surge capability - making it optimal for space-constrained automotive modules where qualification and proven field reliability are mandatory.
Availability
P4KE18HE3/73 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and consumer USB power rail protection requiring stable component supply and traceable sourcing.
Supply support for P4KE18HE3/73 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, MOSFETs, and protection devices with emphasis on reliability and automotive-grade validation.
The P4KE series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 compliance and repeatable clamping performance.
FAQ
What is the breakdown voltage range of the P4KE18HE3/73?
The P4KE18HE3/73 has a guaranteed breakdown voltage range of 17.1 V to 18.9 V at 1.0 mA test current, measured per ANSI/IEEE C62.35 standards. This tight VBR window ensures predictable turn-on behavior during overvoltage events and supports accurate system-level margin analysis for protected circuits.
Is the P4KE18HE3/73 qualified for automotive use?
Yes, the P4KE18HE3/73 carries the HE3 suffix, indicating full AEC-Q101 qualification per the Vishay datasheet revision dated 16-Sep-2021. It has passed stress tests including high-temperature reverse bias, temperature cycling, and ESD, making it suitable for under-hood and chassis-mounted automotive electronics.
What is the clamping voltage of the P4KE18HE3/73 at its rated peak pulse current?
The P4KE18HE3/73 clamps to a maximum of 25.2 V at its rated peak pulse current of 15.9 A (10/1000 μs waveform). This value is measured under standardized surge conditions and defines the upper voltage limit imposed on protected circuitry during transient events.
Does the P4KE18HE3/73 have bidirectional capability?
No, the P4KE18HE3/73 is a unidirectional TVS diode. Its part number lacks the "CA" suffix (e.g., P4KE18CA), confirming polarity-specific operation with cathode marked by a band. Bidirectional variants require explicit CA designation and exhibit symmetric clamping in both directions.
What package type does the P4KE18HE3/73 use, and what are its key mechanical attributes?
The P4KE18HE3/73 uses the DO-41 (DO-204AL) axial-leaded package: 2.0–2.7 mm lead diameter, 4.1–5.2 mm body diameter, and UL 94 V-0 rated epoxy molding compound. Leads are matte tin-plated and compliant with J-STD-002 solderability requirements.
P4KE18HE3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 14.5V
- Voltage - Breakdown (Min):
- 16.2V
- Voltage - Clamping (Max) @ Ipp:
- 26.5V
- Current - Peak Pulse (10/1000µs):
- 15.1A
- Power - Peak Pulse:
- 400W
- 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:
- DO-204AL (DO-41)
P4KE18HE3/73 FAQ
1.How can I place an order for P4KE18HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE18HE3/73 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 P4KE18HE3/73 reliable?
The price and inventory of P4KE18HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE18HE3/73 is usually 5 days.
3.What payment methods are accepted for P4KE18HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE18HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE18HE3/73?
P4KE18HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE18HE3/73 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 P4KE18HE3/73?
For technical support, including P4KE18HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE18HE3/73 requirements.
6.How does Aetrix verify that P4KE18HE3/73 is sourced from the original manufacturer or authorized distributors?
All P4KE18HE3/73 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 P4KE18HE3/73 meets industry standards.
7.What is the process for return or replacement of P4KE18HE3/73?
All P4KE18HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE18HE3/73, 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 P4KE18HE3/73 part is unused and in its original packaging.
Return procedure for P4KE18HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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