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Vishay General Semiconductor - Diodes Division P4KE51HE3/73
- Part No.:
- P4KE51HE3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE51HE3/73.pdf
- Description:
- TVS DIODE 41.3VWM 73.5VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,698
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Product details
Overview
P4KE51HE3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for clamping voltage transients on power and signal lines. It features a 43.6 V stand-off voltage (VWM), 48.5–53.6 V breakdown voltage (VBR) at 1 mA, 70.1 V maximum clamping voltage (VC) at 5.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor protection and industrial power supply input stages.
For engineers reviewing the P4KE51HE3/73 datasheet, P4KE51HE3/73 pinout, P4KE51HE3/73 application, or P4KE51HE3/73 equivalent, key selection criteria include verified AEC-Q101 qualification, DO-41 mechanical compatibility, bidirectional capability absence (unidirectional only), and thermal resistance (RθJL = 66 °C/W) for PCB-level transient energy dissipation planning.
Technical Context
This TVS diode operates as a voltage-clamping protection device using an avalanche junction structure. Its glass-passivated chip ensures stable breakdown behavior under repetitive surge stress, and its unidirectional polarity (cathode marked by band) defines forward conduction path during overvoltage events.
The device complies with JEDEC JESD22-B106 soldering conditions (275 °C, 10 s), meets UL 94 V-0 flammability, and supports operation across -55 °C to +175 °C junction temperature range. Its 1.5 W steady-state power dissipation (PD) and 40 A IFSM rating enable robust handling of 8.3 ms half-sine surges in DC power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43.6 V - Maximum continuous reverse voltage before significant leakage; sets operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 48.5–53.6 V at 1 mA - Confirmed avalanche onset range; defines minimum trigger point for transient suppression |
| VC (Clamping Voltage) | 70.1 V at 5.7 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; determines downstream component stress |
| PPPM (Peak Pulse Power) | 400 W - Energy-handling capacity for standardized 10/1000 μs waveform; validates suitability for IEC 61000-4-5 Level 3 |
| TJ max. | +175 °C - Maximum junction temperature; enables use in under-hood automotive environments without derating |
| RθJL | 66 °C/W - Junction-to-lead thermal resistance; informs heatsinking requirements when mounted on copper pour |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard |
Pinout & Package
DO-41 (DO-204AL) molded epoxy package with matte tin-plated leads; cathode identified by color band on body end. Leads conform to J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path); conducts during reverse-transient clamping |
| Cathode | Reverse-biased clamping terminal | Marked by color band; connected to protected line (e.g., 48 V rail); initiates avalanche conduction above VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and low leakage drift over temperature and lifetime |
| 400 W peak pulse power (10/1000 μs) | Validates compliance with IEC 61000-4-5 surge immunity requirements for industrial and automotive systems |
| AEC-Q101 qualification | Confirms reliability for automotive applications including engine control units and ADAS sensor interfaces |
| UL 94 V-0 molding compound | Provides flame-retardant housing essential for enclosed automotive and industrial enclosures |
| JESD 201 class 2 whisker resistance (HE3 suffix) | Prevents tin whisker growth in high-reliability automotive assemblies under thermal cycling stress |
Applications
| Automotive Sensor Protection | Industrial DC Power Input |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends from load-dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional clamping element placed between sensor supply line and chassis ground. Use Value: Limits transient voltage to ≤70.1 V during 5.7 A surge, preventing damage to 5 V or 12 V interface ICs rated for <100 V absolute maximum. |
Use Scenario: Safeguarding 48 V telecom and industrial power supplies against lightning-induced surges on input terminals. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input rail upstream of DC-DC converters and PMICs. Use Value: Absorbs 400 W transient energy within 1 ms, maintaining system uptime without fuse blow or MOSFET failure. |
| Consumer Power Adapter Output | Motor Drive Control Signal Line |
|
Use Scenario: Secondary-side surge suppression on USB-C PD and laptop adapter outputs exposed to ESD and cable coupling. IC Role / Device Role / Timing Role: Fast-response shunt protector between VBUS and GND, triggered within nanoseconds. Use Value: Clamps 15 kV contact ESD (IEC 61000-4-2) to <70.1 V, preserving USB controller and port controller integrity. |
Use Scenario: Shielding gate driver inputs and feedback signals in BLDC motor inverters from commutation noise. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) transient suppressor on isolated PWM and current-sense lines. Use Value: Prevents false triggering of gate drivers by limiting coupled spikes to safe logic thresholds without signal distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A | DO-214AA package; 51 V VBR; 600 W PPPM; higher surge current (11.9 A) but larger footprint | Better suited for space-tolerant industrial boards needing higher energy absorption | Select SMBJ51A when board layout allows larger SMD footprint and >400 W surge margin is required |
| 1.5KE51A | DO-201AD package; same VBR range; 1500 W PPPM; axial lead, higher thermal mass, slower response than P4KE series | Preferred for legacy through-hole designs and high-energy AC line protection | Choose 1.5KE51A for through-hole prototyping or where higher single-pulse energy (1500 W) outweighs speed and size constraints |
Compared with SMBJ51A and 1.5KE51A, the P4KE51HE3/73 offers optimal balance of AEC-Q101 qualification, compact DO-41 form factor, and validated 400 W surge performance - making it the preferred choice for new automotive and space-constrained industrial designs requiring production-grade reliability.
Availability
P4KE51HE3/73 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial 48 V power inputs, and consumer adapter output protection requiring stable component supply across multi-year production cycles.
Supply support for P4KE51HE3/73 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 and automotive qualification.
The P4KE51HE3/73 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for fast, repeatable clamping of inductive-switching and lightning-induced transients in harsh-environment applications.
FAQ
What is the clamping voltage of the P4KE51HE3/73 under a 10/1000 μs surge?
The P4KE51HE3/73 has a maximum clamping voltage (VC) of 70.1 V at 5.7 A peak pulse current (IPPM) for a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88365 and defines the upper voltage limit imposed on protected circuits during standardized surge events. The P4KE51HE3/73 maintains this clamping performance across its qualified temperature range.
Is the P4KE51HE3/73 suitable for automotive applications?
Yes, the P4KE51HE3/73 is AEC-Q101 qualified per Vishay documentation, confirming validation for automotive use including temperature cycling, high-temperature reverse bias, and ESD testing. Its DO-41 package, 175 °C max junction temperature, and JESD 201 class 2 whisker resistance (HE3 suffix) make the P4KE51HE3/73 appropriate for engine control, body electronics, and ADAS sensor protection.
What does the "HE3" suffix indicate in P4KE51HE3/73?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 class 2 whisker resistance - exceeding class 1A (E3) requirements. This distinguishes the P4KE51HE3/73 from commercial-grade E3 variants and confirms suitability for automotive production. The "73" indicates packaging in 73 mm tape-and-reel format per Vishay ordering conventions.
How does the P4KE51HE3/73 differ from bidirectional TVS diodes like P4KE51CA?
The P4KE51HE3/73 is unidirectional and features a cathode band for polarity-sensitive placement, while P4KE51CA is bidirectional with no marking and symmetrical clamping in both directions. The P4KE51HE3/73 provides lower forward voltage (VF = 3.5 V at 25 A) and is intended for DC line protection where polarity is fixed - unlike P4KE51CA, which suits AC or floating signal lines.
What is the thermal resistance from junction to lead (RθJL) for the P4KE51HE3/73?
The P4KE51HE3/73 has a typical junction-to-lead thermal resistance (RθJL) of 66 °C/W, as specified in Vishay document 88365. This parameter directly impacts steady-state power handling: at 1.5 W dissipation, the junction-to-lead temperature rise is ~99 °C. Proper PCB copper pour under the leads is recommended to maintain safe TJ in high-ambient environments.
P4KE51HE3/73 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):
- 41.3V
- Voltage - Breakdown (Min):
- 45.9V
- Voltage - Clamping (Max) @ Ipp:
- 73.5V
- Current - Peak Pulse (10/1000µs):
- 5.4A
- 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)
P4KE51HE3/73 FAQ
1.How can I place an order for P4KE51HE3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE51HE3/73 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 P4KE51HE3/73 reliable?
The price and inventory of P4KE51HE3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE51HE3/73 is usually 5 days.
3.What payment methods are accepted for P4KE51HE3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE51HE3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE51HE3/73?
P4KE51HE3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE51HE3/73 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 P4KE51HE3/73?
For technical support, including P4KE51HE3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE51HE3/73 requirements.
6.How does Aetrix verify that P4KE51HE3/73 is sourced from the original manufacturer or authorized distributors?
All P4KE51HE3/73 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 P4KE51HE3/73 meets industry standards.
7.What is the process for return or replacement of P4KE51HE3/73?
All P4KE51HE3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE51HE3/73, 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 P4KE51HE3/73 part is unused and in its original packaging.
Return procedure for P4KE51HE3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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