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Vishay General Semiconductor - Diodes Division P4KE51AHE3/54
- Part No.:
- P4KE51AHE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE51AHE3/54.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,500
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Product details
Overview
P4KE51AHE3/54 from Vishay General Semiconductor is a unidirectional TransZORB® transient voltage suppressor (TVS) diode in DO-41 package, designed for clamping inductive switching surges and lightning-induced transients on DC power rails and signal lines. It features 400 W peak pulse power (10/1000 μs), 43.6 V stand-off voltage (VWM), 48.5–53.6 V breakdown voltage (VBR at 1 mA), and clamps to ≤70.1 V at 5.7 A peak pulse current - used in automotive ECU power input protection and industrial sensor interface circuits.
For engineers reviewing the P4KE51AHE3/54 datasheet, P4KE51AHE3/54 pinout, P4KE51AHE3/54 application, or P4KE51AHE3/54 equivalent, key selection criteria include its AEC-Q101 qualification, DO-41 leaded package compatibility with through-hole PCB assembly, bidirectional-capable family variants (e.g., P4KE51CA), and thermal derating behavior above 25 °C ambient.
Technical Context
This device operates as a silicon avalanche diode optimized for fast transient suppression: it exhibits sub-nanosecond response time and low incremental surge resistance, enabling effective clamping before downstream ICs experience overvoltage stress. Its glass-passivated junction ensures stable VBR tolerance (±5%) and long-term reliability under repetitive surge conditions.
The P4KE51AHE3/54 is rated for 175 °C maximum junction temperature and features a 66 °C/W junction-to-lead thermal resistance. Its 1.5 W steady-state power dissipation (at TL = 75 °C) and 40 A 8.3 ms forward surge rating support robust operation in automotive and industrial environments with high ambient temperatures and infrequent but severe transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA; sets safe DC rail margin for 48 V systems. |
| VBR (min/max) | 48.5 V / 53.6 V at 1 mA - tight 5% tolerance ensures predictable clamping onset across production lots. |
| VC @ IPPM | ≤70.1 V at 5.7 A - defines worst-case clamped voltage during 10/1000 μs surge; critical for MOSFET gate or MCU I/O survivability. |
| PPPM | 400 W - peak pulse power handling per single 10/1000 μs waveform; supports EN 61000-4-5 Level 4 compliance testing. |
| TJ max. | 175 °C - enables use in under-hood automotive locations and sealed industrial enclosures without forced cooling. |
| RθJL | 66 °C/W - quantifies thermal path efficiency from junction to lead; informs heatsinking requirements for repeated surge duty. |
Pinout & Package
DO-41 (DO-204AL) molded epoxy package with axial leads; matte tin-plated terminals compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by color band on body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential node in unidirectional clamp configuration. |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 48 V supply rail); color band identifies this end for correct orientation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD - suitable for engine control, body electronics, and ADAS modules. |
| Glass passivated junction | Ensures stable VBR and low leakage (<1 μA at VWM) over 15+ year service life in humid or thermally cycled environments. |
| 400 W 10/1000 μs pulse rating | Meets IEC 61000-4-5 surge immunity requirements for industrial equipment and telecom infrastructure interfaces. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during transient events - protects 50 V-rated MOSFETs and 3.3 V/5 V logic inputs without additional series impedance. |
| RoHS-compliant HE3 suffix | Indicates AEC-Q101 qualification and JESD 201 Class 2 whisker resistance - required for automotive Tier 1 BOMs and long-lifecycle industrial designs. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamping |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to shunt surge energy before reaching DC-DC converter input. Use Value: Withstands 400 W pulses and clamps to ≤70.1 V, ensuring downstream regulators remain within absolute maximum ratings during ISO 7637-2 Pulse 5a events. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector entry point to absorb ±8 kV contact ESD per IEC 61000-4-2. Use Value: Sub-ns response and 1 μA leakage at 43.6 V preserve sensor accuracy while preventing latch-up in connected ADC front-ends. |
| Telecom DC Power Feeds | Consumer Device USB Port Protection |
Use Scenario: Safeguarding PoE-powered network switches against induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on midspan injector output, coordinated with secondary MOV-based protection. Use Value: 175 °C TJ max and 66 °C/W RθJL allow reliable operation in sealed enclosures with minimal airflow and sustained 48 V bias. |
Use Scenario: Adding robustness to USB-C power delivery inputs in portable audio/video gear exposed to user-handling ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS on VBUS line upstream of USB PD controller to prevent damage during hot-plug events. Use Value: 43.6 V VWM provides margin above 20 V PD3.0 max, while 70.1 V VC avoids triggering overvoltage lockout in companion PMICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A | Surface-mount SMA package (vs. through-hole DO-41); same 43.6 V VWM, 48.5–53.6 V VBR, but lower 400 W rating tested at 10/1000 μs with 0.01% duty cycle. | Requires SMT reflow process and board space optimization; not drop-in compatible due to footprint and thermal path differences. | Select SMAJ51A when automated assembly, smaller footprint, or higher board density is prioritized over manual repairability and lead-forming flexibility. |
| P4KE51CA | Bidirectional variant with identical VWM (43.6 V), VBR (48.5–53.6 V), and PPPM (400 W), but no polarity marking and symmetric clamping in both directions. | Used where AC-coupled signals or dual-rail supplies require symmetrical surge suppression without polarity constraints. | Choose P4KE51CA for RS-485 data lines, AC adapter inputs, or any application requiring equal positive/negative transient handling - not for DC-biased unidirectional rails. |
Compared with SMAJ51A and P4KE51CA, the P4KE51AHE3/54 offers AEC-Q101 qualification and DO-41 mechanical robustness for high-reliability through-hole deployments, whereas SMAJ51A trades qualification for SMT scalability and P4KE51CA adds bidirectional symmetry at the cost of polarity-aware design discipline.
Availability
P4KE51AHE3/54 is available at Aetrix Electronics and suitable for automotive ECU power input protection, industrial sensor interface clamping, and telecom DC feed surge suppression requiring stable component supply and long-term lifecycle assurance.
Supply support for P4KE51AHE3/54 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, rectifiers, MOSFETs, and passive components with emphasis on reliability, power handling, and automotive-grade qualification.
The P4KE51AHE3/54 belongs to Vishay's TransZORB® TVS diode family, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated without adding complexity.
FAQ
What is the maximum clamping voltage of the P4KE51AHE3/54 during a 10/1000 μs surge event?
The P4KE51AHE3/54 clamps to a maximum of 70.1 V at its rated peak pulse current of 5.7 A under a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88365 and represents the worst-case voltage seen by downstream circuitry during standardized surge testing - critical for verifying compatibility with 50 V-rated components in the protected path.
Is the P4KE51AHE3/54 suitable for automotive applications?
Yes, the P4KE51AHE3/54 is AEC-Q101 qualified and carries the HE3 suffix denoting compliance with automotive stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing. Its 175 °C maximum junction temperature and DO-41 mechanical robustness make it appropriate for under-hood and body-control module deployments.
How does the P4KE51AHE3/54 differ from the P4KE51CA variant?
The P4KE51AHE3/54 is unidirectional with cathode marking, while P4KE51CA is bidirectional with no polarity marking and symmetric clamping in both directions. Both share identical VWM (43.6 V), VBR (48.5–53.6 V), and PPPM (400 W), but P4KE51CA is selected only when AC-coupled or dual-polarity transient protection is required - not for DC-biased rails where polarity matters.
What is the thermal resistance from junction to lead for the P4KE51AHE3/54?
The P4KE51AHE3/54 has a typical junction-to-lead thermal resistance (RθJL) of 66 °C/W, as specified in Vishay document 88365. This parameter governs how effectively heat generated during surge events transfers from the silicon die to the PCB copper or heatsink via the leads - essential for estimating temperature rise during repetitive surge duty cycles.
Does the P4KE51AHE3/54 meet RoHS requirements?
Yes, the HE3 suffix in P4KE51AHE3/54 confirms RoHS compliance per EU Directive 2011/65/EU and Vishay's material categorization standard (document 99912). The device uses matte tin-plated leads and UL 94 V-0 compliant epoxy molding compound, with no restricted substances above threshold limits.
P4KE51AHE3/54 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 5.7A
- 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)
P4KE51AHE3/54 FAQ
1.How can I place an order for P4KE51AHE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE51AHE3/54 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 P4KE51AHE3/54 reliable?
The price and inventory of P4KE51AHE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE51AHE3/54 is usually 5 days.
3.What payment methods are accepted for P4KE51AHE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE51AHE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE51AHE3/54?
P4KE51AHE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE51AHE3/54 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 P4KE51AHE3/54?
For technical support, including P4KE51AHE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE51AHE3/54 requirements.
6.How does Aetrix verify that P4KE51AHE3/54 is sourced from the original manufacturer or authorized distributors?
All P4KE51AHE3/54 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 P4KE51AHE3/54 meets industry standards.
7.What is the process for return or replacement of P4KE51AHE3/54?
All P4KE51AHE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE51AHE3/54, 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 P4KE51AHE3/54 part is unused and in its original packaging.
Return procedure for P4KE51AHE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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