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Vishay General Semiconductor - Diodes Division P4KE82-E3/73
- Part No.:
- P4KE82-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE82-E3/73.pdf
- Description:
- TVS DIODE 66.4VWM 118VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,889
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Product details
Overview
P4KE82-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-41 package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 70.1 V standoff voltage (VWM), 77.9–86.1 V breakdown voltage (VBR at 1 mA), 113 V clamping voltage (VC) at 3.5 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the P4KE82-E3/73 datasheet, P4KE82-E3/73 pinout, P4KE82-E3/73 application, or P4KE82-E3/73 equivalent, key selection considerations include its unidirectional polarity, glass-passivated junction, AEC-Q101 qualification (via HE3 variant), 175 °C max junction temperature, and suitability for automotive sensor line protection where fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.34), and robust surge handling are required.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ at VWM), but avalanches rapidly when reverse voltage exceeds VBR, diverting transient energy to ground. Its glass-passivated junction ensures stable leakage and long-term reliability across -55 °C to +175 °C operating range.
The device complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive transients) immunity requirements when properly laid out. Thermal resistance of 66 °C/W (junction-to-lead) enables effective heat dissipation during repetitive surge events without derating below 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 70.1 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 77.9–86.1 V at 1 mA - Tight tolerance window ensures predictable turn-on threshold for transient suppression. |
| VC (Clamping Voltage) | 113 V at 3.5 A IPPM - Limits downstream circuit voltage during 10/1000 μs surge, protecting ICs rated ≤120 V. |
| PPPM (Peak Pulse Power) | 400 W - Sustains single 10/1000 μs transient events without failure; derates linearly above 25 °C ambient. |
| IPPM (Peak Pulse Current) | 3.5 A - Maximum non-repetitive surge current handled at VC; determines minimum series impedance needed. |
| TJmax | 175 °C - Enables operation in under-hood automotive environments and industrial enclosures with elevated ambient temps. |
| RθJL | 66 °C/W - Low thermal resistance allows efficient heat transfer to PCB copper or heatsinked leads for repeated surges. |
Pinout & Package
Package: DO-41 (DO-204AL), axial-leaded, molded epoxy body with matte tin-plated leads. Cathode indicated by color band on one end; anode is unmarked lead.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded lead) | Forward current entry / Reverse voltage reference | Connected to protected line (e.g., signal or power rail); referenced to system ground via cathode. |
| Cathode (banded lead) | Clamping node / Surge return path | Must be connected directly to low-impedance ground plane to minimize inductance and ensure sub-113 V clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable leakage current (<1 μA at VWM) and long-term reliability under thermal cycling and humidity stress. |
| 400 W peak pulse power (10/1000 μs) | Provides robust protection against ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 3a/b (line dump) in automotive ECUs. |
| AEC-Q101 qualified (HE3 variant) | Validated for automotive-grade reliability including HTOL, TC, UHAST, and mechanical shock per JESD47 standards. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD), improving clamping accuracy for <100 ns edges. |
| Solderable per J-STD-002/JESD 22-B102 | Supports automated reflow and wave soldering with 275 °C max dip tolerance for 10 s, ensuring assembly compatibility. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., oxygen, pressure) from load dump and alternator ripple in vehicle ECUs. IC Role / Device Role: Unidirectional shunt clamp placed between signal line and chassis ground, absorbing transients before they reach the transceiver input stage. Use Value: Clamps 12 V system transients to ≤113 V, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs while maintaining <1 μA leakage at 13.5 V nominal. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring faults and relay coil flyback. IC Role / Device Role: Primary overvoltage clamp on dry-contact or optocoupler input lines, coordinated with series current-limiting resistor. Use Value: Withstands 40 A IFSM surge (8.3 ms half-sine), enabling reliable operation in factory-floor environments with frequent inductive switching noise. |
| Consumer Power Adapter Protection | Telecom Line Interface Protection |
|
Use Scenario: Secondary-side transient suppression on 5–19 V DC outputs of wall adapters and USB PD chargers exposed to ESD and capacitive coupling. IC Role / Device Role: Final-stage clamp after DC-DC converter, limiting output rail excursions during hot-plug or cable discharge events. Use Value: 113 V clamping voltage prevents overvoltage damage to downstream USB-C controller ICs rated for 20 V absolute maximum, with no additional crowbar circuitry needed. |
Use Scenario: Protecting Ethernet PHY or DSL line drivers from lightning-induced surges on twisted-pair telecom interfaces. IC Role / Device Role: First-line defense in hybrid protection circuits, paired with gas discharge tube (GDT) for high-energy diversion. Use Value: Fast <1 ns response time captures initial surge edge before GDT fires, reducing let-through energy to <10 mJ for PHY ESD robustness per IEC 61000-4-2 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A | DO-214AA package, 8.0 V VWM, 400 W PPPM, lower VC/VBR ratio (1.28), higher capacitance (150 pF @ 0 V). | Better suited for high-speed data lines (USB, HDMI) due to lower clamping ratio; less ideal for 70 V rails due to lower VWM. | Select SMBJ8.0A only if protecting 5–12 V systems requiring tighter clamping and surface-mount layout; not a direct replacement for 70 V rail protection. |
| 1.5KE82A | Same DO-41 package, identical VWM/VBR/VC specs, but 1500 W PPPM rating and 50 A IPPM - larger chip, higher surge capacity. | Used where higher single-event energy (e.g., MIL-STD-1275B) must be absorbed without degradation; overqualified for standard automotive ISO 7637-2. | Choose 1.5KE82A when surge duty cycle exceeds 0.01 % or when legacy designs require backward-compatible footprint with enhanced ruggedness. |
Compared with SMBJ8.0A and 1.5KE82A, the P4KE82-E3/73 delivers optimal balance of 70 V standoff, 400 W surge capability, and DO-41 through-hole manufacturability for cost-sensitive automotive and industrial control applications - neither over-engineered nor under-specified for typical 12/24 V system transients.
Availability
P4KE82-E3/73 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, consumer power adapter secondary sides, and telecom line interface protection requiring stable component supply and RoHS-compliant sourcing.
Supply support for P4KE82-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The P4KE series targets cost-effective, high-volume transient suppression in automotive, industrial, and consumer electronics - engineered for robustness in harsh environments and compatibility with automated assembly processes.
FAQ
What is the maximum clamping voltage of the P4KE82-E3/73 under standard test conditions?
The P4KE82-E3/73 has a maximum clamping voltage (VC) of 113 V when subjected to a 10/1000 μs waveform at a peak pulse current (IPPM) of 3.5 A. This value is measured per JEDEC standards and guarantees that downstream circuitry sees no more than 113 V during transient events, making it suitable for protecting 100 V-rated components in 12 V or 24 V systems. The P4KE82-E3/73 maintains this clamping performance across its full operating temperature range.
Is the P4KE82-E3/73 suitable for automotive applications requiring AEC-Q101 qualification?
The P4KE82-E3/73 itself is RoHS-compliant commercial-grade; however, its AEC-Q101-qualified counterpart is the P4KE82HE3/73 (HE3 suffix). While both share identical electrical characteristics and DO-41 packaging, only the HE3 variant undergoes full stress testing per AEC-Q101. For automotive use, specify P4KE82HE3/73 - the P4KE82-E3/73 is intended for industrial and consumer applications where qualification is not mandated.
How does the P4KE82-E3/73 compare to bidirectional TVS diodes like P4KE82CA?
The P4KE82-E3/73 is unidirectional and features a cathode band for polarity-sensitive placement, whereas P4KE82CA is bidirectional with no polarity marking and symmetrical clamping in both directions. The P4KE82-E3/73 offers lower leakage (<1 μA at 70.1 V) and is preferred for DC-biased lines like power rails or unidirectional signal paths. Bidirectional variants are used in AC-coupled or floating lines such as telecom interfaces or differential buses where polarity reversal may occur.
What is the thermal resistance and maximum junction temperature of the P4KE82-E3/73?
The P4KE82-E3/73 has a typical junction-to-lead thermal resistance (RθJL) of 66 °C/W and a maximum junction temperature (TJmax) of +175 °C. This allows sustained operation in high-ambient environments such as engine compartments or enclosed industrial controls. When mounted on PCBs with adequate copper pour, the device can handle repetitive surges without exceeding thermal limits, provided lead temperature stays below 75 °C per the derating curve in the datasheet.
Can the P4KE82-E3/73 be used in parallel to increase surge current handling?
No - the P4KE82-E3/73 should not be paralleled without external balancing resistors due to VBR tolerance (±5 %) causing current imbalance and potential thermal runaway. Even with matched units, slight parameter variations lead to unequal current sharing during transients. For higher surge ratings, select a single higher-power device such as 1.5KE82A (1500 W) instead of paralleling multiple P4KE82-E3/73 units, which introduces reliability risk and layout complexity.
P4KE82-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):
- 66.4V
- Voltage - Breakdown (Min):
- 73.8V
- Voltage - Clamping (Max) @ Ipp:
- 118V
- Current - Peak Pulse (10/1000µs):
- 3.4A
- 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)
P4KE82-E3/73 FAQ
1.How can I place an order for P4KE82-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE82-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 P4KE82-E3/73 reliable?
The price and inventory of P4KE82-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 P4KE82-E3/73 is usually 5 days.
3.What payment methods are accepted for P4KE82-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE82-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE82-E3/73?
P4KE82-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE82-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 P4KE82-E3/73?
For technical support, including P4KE82-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE82-E3/73 requirements.
6.How does Aetrix verify that P4KE82-E3/73 is sourced from the original manufacturer or authorized distributors?
All P4KE82-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 P4KE82-E3/73 meets industry standards.
7.What is the process for return or replacement of P4KE82-E3/73?
All P4KE82-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE82-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 P4KE82-E3/73 part is unused and in its original packaging.
Return procedure for P4KE82-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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