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Vishay General Semiconductor - Diodes Division P4KE18HE3/54
- Part No.:
- P4KE18HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE18HE3/54.pdf
- Description:
- TVS DIODE 14.5VWM 26.5VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,564
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Product details
Overview
P4KE18HE3/54 from Vishay General Semiconductor is a unidirectional TransZORB® transient voltage suppressor diode in DO-41 package, rated for 18 V breakdown voltage (VBR = 17.1–18.9 V at IT = 1.0 mA), 400 W peak pulse power (10/1000 μs), and 15.9 A peak pulse current (IPPM). It clamps transients to ≤25.2 V and operates from –55 °C to +175 °C, serving as primary overvoltage protection for automotive sensor signal lines.
For engineers reviewing the P4KE18HE3/54 datasheet, P4KE18HE3/54 pinout, P4KE18HE3/54 application, or P4KE18HE3/54 equivalent, this AEC-Q101 qualified TVS diode delivers verified clamping performance, low leakage (<1.0 μA at 15.3 V), and robust surge handling for ESD and load-dump hardened designs.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance. Its 10/1000 μs waveform rating reflects standardized industrial surge immunity testing per REA definitions, with thermal resistance RθJL = 66 °C/W enabling reliable power dissipation under repetitive transients.
The device features a cathode band marking, matte tin-plated leads compliant with J-STD-002, and meets UL 94 V-0 flammability. The HE3 suffix confirms AEC-Q101 qualification and JESD 201 Class 2 whisker resistance - critical for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at 1.0 mA - defines precise clamping onset threshold for design margining |
| VWM | 15.3 V - maximum continuous reverse working voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 25.2 V - clamped voltage during 15.9 A 10/1000 μs surge, limiting downstream IC stress |
| PPPM | 400 W - peak transient energy absorption capability under standard surge waveform |
| IPPM | 15.9 A - maximum non-repetitive surge current the device safely conducts |
| TJ max. | +175 °C - enables operation in high-temperature automotive engine compartments |
| RθJL | 66 °C/W - quantifies thermal path efficiency from junction to lead for PCB layout thermal planning |
Pinout & Package
Package: DO-41 (DO-204AL), axial-leaded, molded epoxy body with glass-passivated chip. Cathode indicated by color band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., sensor output); color band identifies this end |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive powertrain and chassis electronics per stress test requirements |
| Glass passivated junction | Ensures stable VBR and low leakage across temperature and lifetime without hermetic sealing |
| 400 W 10/1000 μs rating | Meets ISO 7637-2 Pulse 1, 2a, 3a/b and IEC 61000-4-5 Level 3 surge immunity requirements |
| Low clamping ratio (VC/VBR ≈ 1.33) | Minimizes voltage overshoot during transients, reducing risk of logic upset or latch-up in protected ICs |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling, critical for long-life automotive modules |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature (ECT) sensors exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and microcontroller ADC input, referenced to chassis ground. Use Value: Clamps transients to ≤25.2 V while maintaining <1.0 μA leakage at 15.3 V, preserving sensor accuracy and preventing ADC saturation. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from inductive switching spikes. IC Role / Device Role / Timing Role: Front-end transient suppressor on each optocoupler input line, absorbing 400 W surges without failure. Use Value: Withstands 15.9 A peak pulses and operates up to +175 °C, ensuring uptime in factory-floor control cabinets. |
| Consumer Power Adapter Input | Telecom Line Interface |
Use Scenario: Secondary-side overvoltage protection in AC/DC adapters for USB-C PD chargers. IC Role / Device Role / Timing Role: Clamp diode across DC output rails to prevent damage during output short-circuit recovery events. Use Value: Fast response time and 25.2 V clamping limit voltage seen by downstream USB-PD controller ICs during fault conditions. |
Use Scenario: Surge suppression on RS-485 data lines in base station remote radio units. IC Role / Device Role / Timing Role: Bidirectional-capable family variant used in unidirectional configuration for polarity-controlled line protection. Use Value: Low capacitance and 400 W rating meet ITU-T K.20/21 telecom surge standards without degrading 10 Mbps signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | DO-214AA package, 600 W PPPM, 28.8 V VC @ 21.2 A, higher power but larger footprint | Better suited for higher-energy surges; requires PCB re-layout due to SMD package | Select when surge energy exceeds 400 W or board space permits surface-mount implementation |
| P6KE18A | Same DO-41 package, 600 W PPPM, 28.8 V VC @ 21.2 A, higher power rating but same pinout | Higher clamping voltage reduces protection margin for low-voltage ICs | Choose only if legacy P6KE-series compliance is required and 28.8 V clamping is acceptable |
Compared with SMBJ18A and P6KE18A, the P4KE18HE3/54 offers optimal balance of AEC-Q101 qualification, compact DO-41 through-hole fit, and tight 25.2 V clamping - making it preferred for cost-sensitive, high-reliability automotive and industrial replacements where layout change is not feasible.
Availability
P4KE18HE3/54 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P4KE18HE3/54 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade qualification.
The P4KE18HE3/54 belongs to Vishay's TransZORB® TVS family, engineered specifically for robust transient suppression in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the breakdown voltage tolerance for P4KE18HE3/54?
The P4KE18HE3/54 has a specified breakdown voltage range of 17.1 V to 18.9 V at 1.0 mA test current, representing ±5.6% tolerance around the nominal 18 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports precise circuit protection margining in designs using the P4KE18HE3/54.
Is P4KE18HE3/54 suitable for bidirectional transient suppression?
No - the P4KE18HE3/54 is a unidirectional TVS diode, identified by its "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., P4KE18CA). Using the P4KE18HE3/54 in reverse-biased configurations risks forward conduction and failure; always verify polarity alignment in the circuit when deploying the P4KE18HE3/54.
What does the "HE3/54" suffix mean in P4KE18HE3/54?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance; "/54" denotes the preferred package code for 13-inch paper tape and reel packaging with 5500 units per reel. This full designation confirms the P4KE18HE3/54 meets automotive reliability standards and is supplied in production-ready packaging.
How does P4KE18HE3/54 perform under elevated ambient temperatures?
The P4KE18HE3/54 derates linearly above 25 °C ambient: its peak pulse power drops to 50% at ~125 °C junction temperature per Figure 2. With RθJL = 66 °C/W, proper lead-to-PCB copper thermal coupling is essential. At 100 °C ambient, the P4KE18HE3/54 retains >75% of its 400 W rating - validated for under-hood automotive use.
Can P4KE18HE3/54 replace older P4KE18A variants in existing designs?
Yes - the P4KE18HE3/54 is a direct drop-in replacement for P4KE18A in terms of electrical specs, DO-41 package, and pinout. The "HE3" adds AEC-Q101 qualification and enhanced whisker resistance, making it suitable for upgraded automotive or industrial revisions. No PCB changes are needed when migrating from P4KE18A to P4KE18HE3/54.
P4KE18HE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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)
P4KE18HE3/54 FAQ
1.How can I place an order for P4KE18HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE18HE3/54 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 P4KE18HE3/54 reliable?
The price and inventory of P4KE18HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE18HE3/54 is usually 5 days.
3.What payment methods are accepted for P4KE18HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE18HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE18HE3/54?
P4KE18HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE18HE3/54 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 P4KE18HE3/54?
For technical support, including P4KE18HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE18HE3/54 requirements.
6.How does Aetrix verify that P4KE18HE3/54 is sourced from the original manufacturer or authorized distributors?
All P4KE18HE3/54 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 P4KE18HE3/54 meets industry standards.
7.What is the process for return or replacement of P4KE18HE3/54?
All P4KE18HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE18HE3/54, 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 P4KE18HE3/54 part is unused and in its original packaging.
Return procedure for P4KE18HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE18HE3/54 Tags
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