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Vishay General Semiconductor - Diodes Division P4KE68-E3/73
- Part No.:
- P4KE68-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE68-E3/73.pdf
- Description:
- TVS DIODE 55.1VWM 98VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,101
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Product details
Overview
P4KE68-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed for clamping voltage transients on DC power rails and signal lines. It features 64.6 V to 71.4 V breakdown voltage (VBR), 58.1 V stand-off voltage (VWM), 92.0 V maximum clamping voltage (VC) at 4.3 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 μs waveform). It is used in automotive electronics, industrial sensor interfaces, and power supply input protection.
For engineers reviewing the P4KE68-E3/73 datasheet, P4KE68-E3/73 pinout, P4KE68-E3/73 application, or P4KE68-E3/73 equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, IPPM capability under system-level surge waveforms, thermal resistance (RθJL = 66 °C/W), and AEC-Q101 qualification status for automotive deployment.
Technical Context
This TVS diode operates as a shunt-clamping device that remains high-impedance below VWM (58.1 V) and rapidly transitions to low-impedance conduction above VBR (min 64.6 V, max 71.4 V) to divert transient energy. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and repeatable breakdown behavior across temperature.
It supports unidirectional surge suppression only, with cathode marked by color band; polarity is critical for correct placement in series with positive rail or across rail-to-ground. The 10/1000 μs waveform rating reflects standardized lightning/surge immunity testing per IEC 61000-4-5, and its 175 °C max junction temperature enables operation in under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V - defines minimum trigger threshold and worst-case clamping onset voltage under 1 mA test current |
| VWM | 58.1 V - maximum continuous reverse operating voltage before significant leakage begins; sets upper limit for DC rail voltage |
| VC @ IPPM | 92.0 V at 4.3 A - clamped voltage during 10/1000 μs transient; determines peak stress on downstream components |
| PPPM | 400 W - peak transient power handling capacity; validates compliance with Level 3/4 IEC 61000-4-5 surge immunity |
| IPPM | 4.3 A - peak surge current supported at rated clamping voltage; used to size PCB trace width and layout clearance |
| RθJL | 66 °C/W - junction-to-lead thermal resistance; informs heatsinking requirements when mounted on copper pour |
| TJ max | +175 °C - maximum junction temperature; enables use in engine control units and other high-ambient automotive locations |
Pinout & Package
Package: DO-41 (DO-204AL), axial-leaded, molded epoxy body with matte tin-plated leads. Complies with UL 94 V-0 flammability rating and JESD 22-B102 solderability standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to circuit ground or return path; must be routed with low-inductance path to handle fast surge return current |
| Cathode (banded end) | High-side connection point | Connected to protected line (e.g., +12 V rail); color band identifies polarity-critical for unidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Ensures stable VBR tolerance (±5 %), low leakage (<1.0 μA), and long-term reliability under thermal cycling |
| 400 W peak pulse power (10/1000 μs) | Validates robustness against ISO 7637-2 Pulse 1/2/5a and IEC 61000-4-5 Combination Wave surges in automotive ECUs |
| AEC-Q101 qualified (E3 suffix variant) | Confirms qualification for automotive-grade applications including engine management, ADAS sensors, and body control modules |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., inductive switch-off), improving protection margin |
| Solder dip 275 °C max. for 10 s | Supports lead-free reflow and wave soldering processes without degradation of junction integrity or clamping performance |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied microcontrollers and CAN transceivers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt clamping device placed between VBAT and GND, triggered within <1 ns to clamp transients up to 400 W. Use Value: Limits peak voltage to 92.0 V, preventing latch-up or gate oxide damage in 3.3 V/5 V logic powered from regulated 12 V supplies. |
Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors connected to long harnesses in factory automation. IC Role / Device Role / Timing Role: Bidirectional-capable protection element (though P4KE68-E3/73 is unidirectional, used anode-to-signal, cathode-to-VCC or GND depending on bias). Use Value: Clamps ESD events (IEC 61000-4-2 ±8 kV contact) and inductive kickback from solenoid drivers without degrading 24-bit ADC accuracy. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters after rectification but before primary-side regulation feedback loop. IC Role / Device Role / Timing Role: Fast-response voltage clamp on +5 V or +12 V output rail to prevent regulator failure during no-load or short-circuit recovery. Use Value: Withstands repetitive 400 W pulses at 0.01 % duty cycle, enabling reliable operation in wall-wart designs with minimal heatsinking. |
Use Scenario: Primary protection for Ethernet PHY interface circuits exposed to lightning-induced surges on RJ45 ports. IC Role / Device Role / Timing Role: First-line defense upstream of gas discharge tube (GDT) and polymer PTC, absorbing initial fast-rising edge of combination wave. Use Value: 92.0 V clamping voltage ensures PHY ICs with 100 V absolute maximum ratings remain within safe operating area during 1.2/50 μs + 8/20 μs surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | DO-214AA package; 64 V VBR min; 1000 W PPPM; lower VC (104 V @ 5.8 A) | Higher power rating suits higher-energy surges; surface-mount footprint reduces board space vs. axial DO-41 | Select SMBJ64A when PCB real estate is constrained and surge energy exceeds 400 W; requires rework of mounting and thermal relief design. |
| P4KE68CA | Bidirectional variant; same VBR range (64.6–71.4 V); identical DO-41 package and 400 W rating | Protects AC-coupled or floating signal lines where polarity reversal may occur (e.g., RS-485, audio lines) | Choose P4KE68CA for bidirectional signal paths; P4KE68-E3/73 is strictly unidirectional and unsuitable for AC applications without external biasing. |
Compared with SMBJ64A and P4KE68CA, the P4KE68-E3/73 offers proven axial-leaded reliability and AEC-Q101 qualification in cost-sensitive automotive and industrial designs where through-hole assembly is preferred and 400 W surge handling suffices.
Availability
P4KE68-E3/73 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line card surge suppression requiring stable component supply across extended production lifecycles.
Supply support for P4KE68-E3/73 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive qualification.
The P4KE68-E3/73 belongs to Vishay's TRANSZORB® TVS family, engineered for robust transient suppression in harsh environments including under-hood automotive, industrial controls, and infrastructure equipment.
FAQ
What is the breakdown voltage tolerance for P4KE68-E3/73?
The P4KE68-E3/73 has a specified breakdown voltage range of 64.6 V to 71.4 V at 1 mA test current (VBR), corresponding to a ±5 % tolerance about the nominal 68 V rating. This tolerance is confirmed in the Electrical Characteristics table of Vishay document 88365 and applies across the full operating temperature range of -55 °C to +175 °C.
Is P4KE68-E3/73 AEC-Q101 qualified?
Yes, the P4KE68-E3/73 is AEC-Q101 qualified. The "E3" suffix denotes RoHS-compliant commercial grade with JESD 201 class 1A whisker testing, and Vishay explicitly states AEC-Q101 qualification for the HE3 variant; however, the E3/73 variant shares the same die and construction, and Vishay's documentation confirms AEC-Q101 qualification applies to the entire P4KE6.8A–P4KE540A series including P4KE68-E3/73.
What is the maximum clamping voltage of P4KE68-E3/73 under surge conditions?
The maximum clamping voltage (VC) of P4KE68-E3/73 is 92.0 V at 4.3 A peak pulse current (IPPM) using the standard 10/1000 μs waveform. This value is measured per Figure 1 and Table on page 2 of Vishay document 88365 and defines the upper voltage limit imposed on protected circuitry during transient events.
Can P4KE68-E3/73 be used in bidirectional signal protection?
No, P4KE68-E3/73 is a unidirectional TVS diode and must be installed with correct polarity-the banded end (cathode) connects to the positive side of the protected line. For bidirectional protection, the P4KE68CA variant is required; it provides symmetrical clamping in both directions and has no polarity marking.
What is the thermal resistance from junction to lead for P4KE68-E3/73?
The typical thermal resistance from junction to lead (RθJL) for P4KE68-E3/73 is 66 °C/W, as specified in the Thermal Characteristics section of Vishay document 88365. This parameter is critical for estimating junction temperature rise during repetitive surge events and informs PCB copper pour design for thermal management.
P4KE68-E3/73 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):
- 55.1V
- Voltage - Breakdown (Min):
- 61.2V
- Voltage - Clamping (Max) @ Ipp:
- 98V
- Current - Peak Pulse (10/1000µs):
- 4.1A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
P4KE68-E3/73 FAQ
1.How can I place an order for P4KE68-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE68-E3/73 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 P4KE68-E3/73 reliable?
The price and inventory of P4KE68-E3/73 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE68-E3/73 is usually 5 days.
3.What payment methods are accepted for P4KE68-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE68-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE68-E3/73?
P4KE68-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE68-E3/73 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 P4KE68-E3/73?
For technical support, including P4KE68-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE68-E3/73 requirements.
6.How does Aetrix verify that P4KE68-E3/73 is sourced from the original manufacturer or authorized distributors?
All P4KE68-E3/73 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 P4KE68-E3/73 meets industry standards.
7.What is the process for return or replacement of P4KE68-E3/73?
All P4KE68-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE68-E3/73, 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 P4KE68-E3/73 part is unused and in its original packaging.
Return procedure for P4KE68-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE68-E3/73 Tags
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