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Taiwan Semiconductor Corporation P4KE8.2A
- Part No.:
- P4KE8.2A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE8.2A.pdf
- Description:
- TVS DIODE 7.02VWM 12.1VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,369
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Product details
Overview
P4KE8.2A from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 8.2V, a working stand-off voltage of 7.02V, clamps transients to ≤12.1V at 34A peak pulse current, and delivers sub-nanosecond response for ESD and EFT immunity in automotive and industrial control circuits.
For engineers reviewing the P4KE8.2A datasheet, P4KE8.2A pinout, P4KE8.2A application, or P4KE8.2A equivalent, key selection considerations include its DO-41 package compatibility, 7.79–8.61V VBR range at 10mA, <1μA reverse leakage at 7.02V, 12.1V clamping voltage under 34A 10/1000μs surge, and AEC-Q101 qualification option (P4KE8.2AH).
Technical Context
The P4KE8.2A operates as a silicon avalanche diode with unidirectional polarity, leveraging controlled avalanche breakdown to clamp transient energy before downstream ICs are damaged. Its low dynamic impedance ensures stable clamping across surge currents up to 34A, while its <1.0ps response time enables effective suppression of fast-rising ESD events per IEC 61000-4-2.
Thermal performance is defined by a 175°C maximum junction temperature and 1W steady-state power dissipation on 5×5mm copper pads. The device complies with UL 94V-0 flammability standards and meets JESD201 Class 2 whisker resistance, supporting reliable long-term operation in high-reliability PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=10mA | 7.79–8.61V - Ensures precise, repeatable avalanche initiation without premature conduction during normal 7.02V rail operation |
| VWM | 7.02V - Maximum continuous DC or RMS voltage the device blocks without significant leakage (<1μA) |
| VC @ IPPM=34A | ≤12.1V - Clamped voltage seen by protected circuit during full 400W 10/1000μs surge, limiting stress on 5V/3.3V logic |
| PPK | 400W - Peak transient power handling capability per single 10/1000μs waveform, per ANSI/IEEE C62.35 |
| IR @ VWM | <1μA - Minimal standby power loss and negligible loading on sensitive voltage references or sensor bias networks |
| TJ max | 175°C - Enables use in under-hood automotive environments and high-temperature industrial enclosures |
| Package | DO-204AL (DO-41) - Standard through-hole package with tin-plated leads, compatible with wave soldering and J-STD-002 |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, cylindrical glass-passivated body with cathode band marking. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance. Polarity is unidirectional; cathode band denotes the cathode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference node | Connected to system ground or low-side return path; conducts surge current to ground during clamping |
| Cathode | Protected line input | Connected to the line being protected (e.g., 5V rail, CAN_H); blocks VWM and avalanches at VBR during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4kV, 2Ω source) without degradation when properly mounted |
| <1.0ps response time | Clamps ESD events (IEC 61000-4-2 ±8kV contact) before voltage overshoot damages CMOS inputs |
| AEC-Q101 qualified variant available | P4KE8.2AH meets automotive-grade reliability requirements for engine control, body electronics, and ADAS power domains |
| UL 94V-0 molding compound | Prevents flame propagation during fault conditions, satisfying IPC-CC-830B and end-equipment safety certifications |
| Low clamping ratio (VC/VBR ≈ 1.5) | Minimizes voltage overshoot margin needed in protected circuit design-critical for 3.3V/5V logic interfaces |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: 12V battery-supplied microcontroller power input exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp positive-going surges above 7.02V. Use Value: Limits clamped voltage to ≤12.1V during 34A transients, preventing damage to 16V-rated LDOs and MCU VDD pins. |
Use Scenario: 4–20mA current loop transmitter connected to PLC analog input subjected to field wiring EFT. IC Role / Device Role / Timing Role: TVS installed across loop supply terminals to shunt fast transients before reaching precision op-amp front-end. Use Value: Sub-ns response ensures clamping occurs within first 10ns of EFT burst (IEC 61000-4-4), preserving signal integrity and ADC accuracy. |
| LED Driver Overvoltage Clamp | USB Port ESD Suppression |
|
Use Scenario: Constant-current LED driver IC powered from 24V bus in signage systems where inductive switching causes voltage spikes. IC Role / Device Role / Timing Role: P4KE8.2A placed across driver IC's VCC and GND to absorb inductive kickback energy. Use Value: 400W rating sustains repeated 10/1000μs surges up to 34A, extending driver IC lifetime in high-switching-frequency applications. |
Use Scenario: USB 2.0 data lines (D+/D−) routed near external connectors in embedded host devices. IC Role / Device Role / Timing Role: Bidirectional TVS (e.g., P4KE8.2CA) used-but P4KE8.2A serves as unidirectional alternative for VBUS line only. Use Value: 7.02V VWM allows safe operation during 5V±5% USB VBUS, while 12.1V clamping protects USB PHY transceivers rated to 6V absolute max. |
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 (Bourns) | DO-214AA package; 8.0V nominal VBR; 30A IPPM; 12.7V VC; 600W rating | Surface-mount alternative with higher surge rating but larger footprint and different thermal profile | Select SMBJ8.0A for SMT designs requiring higher robustness and board space for thermal relief; P4KE8.2A preferred for legacy through-hole or cost-sensitive THT production. |
| 1.5KE8.2A (ON Semiconductor) | Same DO-41 package; 8.2V nominal; 7.79–8.61V VBR; 34.1A IPPM; 12.1V VC; identical 400W rating | Functionally aligned unidirectional TVS with matching electrical specs and mechanical form factor | 1.5KE8.2A is a direct second-source option with identical clamping behavior and mounting-ideal for dual-sourcing and supply chain resilience. |
Compared with SMBJ8.0A, P4KE8.2A offers lower assembly cost and proven reliability in THT automotive modules; versus 1.5KE8.2A, it provides equivalent protection with Taiwan Semiconductor's AEC-Q101-qualified variant (P4KE8.2AH) for enhanced qualification traceability.
Availability
P4KE8.2A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, LED driver overvoltage clamping, and USB VBUS line protection requiring stable component supply across extended production cycles.
Supply support for P4KE8.2A 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101 certification capabilities.
The P4KE series was developed for cost-effective, high-reliability transient suppression in automotive, industrial, and consumer power systems-emphasizing robust surge handling, tight parameter distribution, and UL/ROHS compliance in standard packages.
FAQ
What is the breakdown voltage tolerance of P4KE8.2A?
The P4KE8.2A has a specified breakdown voltage range of 7.79V to 8.61V at 10mA test current, representing a ±5% tolerance around the nominal 8.2V rating. This tight distribution ensures consistent clamping behavior across production lots and supports predictable circuit protection margins in designs using the P4KE8.2A.
Is P4KE8.2A suitable for bidirectional transient protection?
No, P4KE8.2A is a unidirectional TVS diode intended for DC line protection with defined anode-cathode polarity. For bidirectional applications such as AC lines or differential data buses, the P4KE8.2CA variant must be used. Using P4KE8.2A in reverse-biased AC configurations risks permanent failure due to forward conduction during negative half-cycles.
What is the maximum clamping voltage of P4KE8.2A under surge conditions?
The P4KE8.2A clamps to a maximum of 12.1V when subjected to its rated 34A peak pulse current (10/1000μs waveform). This value is guaranteed across temperature and lifetime, and defines the upper voltage limit imposed on protected circuitry during worst-case transients-critical for ensuring compatibility with 5V or 3.3V logic interfaces downstream of the P4KE8.2A.
Does P4KE8.2A require a heatsink for continuous operation?
No, the P4KE8.2A is rated for 1W steady-state power dissipation when mounted on 5×5mm copper pads per lead, sufficient for typical leakage-limited standby conditions. Heatsinking is unnecessary for normal blocking operation; however, repetitive high-energy surges may require thermal analysis per Figure 2 derating curves in the P4KE8.2A datasheet to avoid junction temperature exceedance.
How does the P4KE8.2A compare to the P4KE8.2 (non-A) version?
The P4KE8.2A offers tighter breakdown voltage tolerance (7.79–8.61V) versus P4KE8.2 (7.38–9.02V), resulting in more consistent clamping performance and reduced design margin uncertainty. Both share identical package, power rating, and thermal limits, but the 'A' suffix indicates improved parametric screening-making P4KE8.2A preferable for precision protection in regulated power domains where VBR spread directly impacts system robustness.
P4KE8.2A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AL, DO-41, Axial
- Series:
- P4KE
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.02V
- Voltage - Breakdown (Min):
- 7.79V
- Voltage - Clamping (Max) @ Ipp:
- 12.1V
- Current - Peak Pulse (10/1000µs):
- 34A
- 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)
P4KE8.2A FAQ
1.How can I place an order for P4KE8.2A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE8.2A 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 P4KE8.2A reliable?
The price and inventory of P4KE8.2A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE8.2A is usually 5 days.
3.What payment methods are accepted for P4KE8.2A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE8.2A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE8.2A?
P4KE8.2A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE8.2A 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 P4KE8.2A?
For technical support, including P4KE8.2A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE8.2A requirements.
6.How does Aetrix verify that P4KE8.2A is sourced from the original manufacturer or authorized distributors?
All P4KE8.2A 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 P4KE8.2A meets industry standards.
7.What is the process for return or replacement of P4KE8.2A?
All P4KE8.2A units undergo pre-shipment inspection (PSI). If there is an issue with P4KE8.2A, 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 P4KE8.2A part is unused and in its original packaging.
Return procedure for P4KE8.2A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE8.2A Tags
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