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Taiwan Semiconductor Corporation P4KE6.8C
- Part No.:
- P4KE6.8C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE6.8C.pdf
- Description:
- 400W, 6.8V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,939
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Product details
Overview
P4KE6.8C from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 6.8V, working stand-off voltage of 5.5V, and clamping voltage of 10.8V at 38A peak pulse current. It delivers fast response (<1.0ps from 0V to VBR), low leakage (<1000μA at 5.5V), and operates across –55°C to +175°C for automotive-grade ESD and inductive switching protection in DC power rails.
For engineers reviewing the P4KE6.8C datasheet, P4KE6.8C pinout, P4KE6.8C application, or P4KE6.8C equivalent, key selection criteria include its DO-204AL (DO-41) axial package, unidirectional polarity marked by cathode band, 10.8V clamping performance under 10/1000μs surge, and AEC-Q101 qualification suitability for automotive electronics.
Technical Context
The P4KE6.8C is a silicon avalanche diode engineered for unidirectional transient suppression in low-voltage DC circuits. Its 6.12–7.48V breakdown range at 10mA test current ensures reliable triggering above 5.5V stand-off, while its 10.8V clamping voltage at 38A limits downstream voltage stress during 400W 10/1000μs surges.
With junction temperature capability up to +175°C and <1.0ps response time from zero bias to breakdown, it supports high-reliability operation in engine control units, LED drivers, and industrial sensors exposed to load dump or EFT events per IEC 61000-4-4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.5 V - Maximum continuous reverse operating voltage before leakage exceeds 1000 μA; defines safe DC rail margin |
| VBR @ IT=10mA | 6.12–7.48 V - Breakdown voltage range ensuring consistent turn-on across production lots |
| VC @ IPPM=38A | 10.8 V - Clamped voltage during 400W 10/1000μs surge; determines maximum stress on protected IC |
| IPPM | 38.0 A - Peak pulse current handling capacity at rated clamping voltage |
| PPK | 400 W - Non-repetitive surge power rating per ANSI/IEEE C62.35 10/1000μs waveform |
| TJ max | +175 °C - Maximum junction temperature enabling under-hood automotive deployment |
| Leakage @ VWM | 1000 μA - Reverse leakage at stand-off voltage; impacts quiescent power in battery-powered systems |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case meeting UL 94V-0 flammability rating; cathode indicated by band on body; pure tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lowest potential node during TVS operation |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 5V rail); cathode band marks polarity for unidirectional conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and infotainment power rails |
| 400W surge capability | Withstands ISO 7637-2 Pulse 1/2a/5a transients without degradation when properly mounted |
| Clamping ratio VC/VBR ≈ 1.55 | Indicates efficient voltage limiting-lower ratio reduces stress on downstream components |
| Response time <1.0ps | Enables protection against nanosecond-scale ESD events (IEC 61000-4-2) before IC damage occurs |
| UL Recognized #E-326243 | Confirms safety compliance for end-equipment certification in North America |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 5V microcontroller supply lines in engine control modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND to clamp positive transients only. Use Value: Limits voltage excursion to ≤10.8V during 400W surges, preventing latch-up or gate oxide damage in MCU power pins. |
Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Standoff protection at sensor signal conditioning stage, absorbing EFT bursts per IEC 61000-4-4 Level 4. Use Value: Maintains signal integrity by suppressing >1kV transients within 1ps, avoiding ADC saturation or op-amp saturation. |
| LED Driver Output Protection | USB Port VBUS Line Protection |
Use Scenario: Shielding constant-current LED driver outputs from inductive kickback during MOSFET switching. IC Role / Device Role / Timing Role: TVS connected anode-to-ground, cathode-to-LED string output to absorb reverse EMF spikes. Use Value: Clamps flyback voltage to 10.8V, eliminating need for snubber RC networks and reducing BOM count. |
Use Scenario: Guarding USB 2.0 VBUS (5V) line against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Unidirectional suppression between VBUS and GND, leveraging low capacitance and fast response. Use Value: Provides <1000μA leakage at 5.5V, preserving USB suspend current budget while passing IEC 61000-4-2 ±15kV contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A | Surface-mount SMB package (vs. axial DO-41); 600W rating; VC = 11.2V @ 53.3A | Better suited for high-density PCBs; requires reflow-compatible layout and thermal pad design | Select SMBJ6.8A when board space is constrained and higher surge margin is needed. |
| 1.5KE6.8C | Same DO-41 package but 1500W rating; VC = 11.5V @ 131A; higher VBR min (6.46V) | Over-specified for 400W use cases; larger junction capacitance may affect high-speed signal lines | Choose 1.5KE6.8C only if legacy 1500W surge immunity standards apply or future-proofing is required. |
Compared with SMBJ6.8A and 1.5KE6.8C, the P4KE6.8C offers optimal balance of axial through-hole manufacturability, AEC-Q101 qualification, and precise 400W/10.8V clamping for cost-sensitive automotive and industrial 5V rail protection-without over-engineering or SMT conversion overhead.
Availability
P4KE6.8C is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, LED driver outputs, and USB VBUS line protection requiring stable component supply and long-term lifecycle support.
Supply support for P4KE6.8C 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 thyristors with global distribution and AEC-Q101 validation capabilities.
The P4KE series was developed specifically for robust, cost-effective transient suppression in automotive and industrial environments where reliability under thermal and electrical stress is critical.
FAQ
What is the polarity configuration of the P4KE6.8C?
The P4KE6.8C is a unidirectional TVS diode with cathode marked by a band on the DO-41 body. It conducts only during positive transients on the cathode side relative to anode, making it ideal for DC rail clamping where reverse voltage is not expected. This differs from bidirectional variants like P4KE6.8CA, which suppress both polarities.
Does the P4KE6.8C meet AEC-Q101 requirements?
Yes, the P4KE6.8C is AEC-Q101 qualified, as confirmed in the official Taiwan Semiconductor documentation. This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life-ensuring suitability for automotive under-hood and cabin applications.
What is the maximum clamping voltage of the P4KE6.8C under surge conditions?
The P4KE6.8C has a maximum clamping voltage (VC) of 10.8 V at 38.0 A peak pulse current, measured under the standard 10/1000μs double-exponential waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events.
How does the P4KE6.8C compare to the P4KE6.8A variant?
The P4KE6.8C has a tighter VBR range (6.12–7.48 V) versus P4KE6.8A (6.46–7.14 V), resulting in lower minimum breakdown voltage and slightly higher leakage at VWM. The "C" suffix denotes standard tolerance, while "A" indicates enhanced VBR uniformity-making P4KE6.8A preferable where precise turn-on consistency is critical.
Can the P4KE6.8C be used in bidirectional protection applications?
No, the P4KE6.8C is strictly unidirectional and must not be used for bidirectional surge suppression. For symmetrical protection, select the P4KE6.8CA variant, which features identical electrical characteristics in both directions and is explicitly designed for AC or dual-polarity DC lines.
P4KE6.8C 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5.5V
- Voltage - Breakdown (Min):
- 6.12V
- Voltage - Clamping (Max) @ Ipp:
- 10.8V
- Current - Peak Pulse (10/1000µs):
- 38A
- 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)
P4KE6.8C FAQ
1.How can I place an order for P4KE6.8C through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE6.8C 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 P4KE6.8C reliable?
The price and inventory of P4KE6.8C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE6.8C is usually 5 days.
3.What payment methods are accepted for P4KE6.8C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE6.8C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE6.8C?
P4KE6.8C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE6.8C 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 P4KE6.8C?
For technical support, including P4KE6.8C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE6.8C requirements.
6.How does Aetrix verify that P4KE6.8C is sourced from the original manufacturer or authorized distributors?
All P4KE6.8C 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 P4KE6.8C meets industry standards.
7.What is the process for return or replacement of P4KE6.8C?
All P4KE6.8C units undergo pre-shipment inspection (PSI). If there is an issue with P4KE6.8C, 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 P4KE6.8C part is unused and in its original packaging.
Return procedure for P4KE6.8C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE6.8C Tags
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