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Taiwan Semiconductor Corporation P4KE6.8A
- Part No.:
- P4KE6.8A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE6.8A.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,251
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Product details
Overview
P4KE6.8A from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails and signal lines. It features a 6.8V nominal breakdown voltage, 5.80V working stand-off voltage, 10.5V maximum clamping voltage at 40A peak pulse current, and fast sub-nanosecond response to ESD and EFT transients. It is commonly deployed in automotive body control modules and industrial sensor interfaces.
For engineers reviewing the P4KE6.8A datasheet, P4KE6.8A pinout, P4KE6.8A application, or P4KE6.8A equivalent, this page delivers verified electrical parameters, DO-41 package details, clamping performance under 10/1000μs surge, temperature coefficient behavior, and AEC-Q101-qualified alternatives for automotive-grade design validation.
Technical Context
The P4KE6.8A operates as a unidirectional avalanche diode with a tightly controlled breakdown range of 6.46–7.14V at 10mA test current. Its low dynamic impedance enables effective clamping during 400W, 10/1000μs surges while maintaining ≤10.5V across the protected node at 40A peak current.
It exhibits a VBR temperature coefficient of +0.057%/°C and reverse leakage <1000μA at 5.80V, ensuring stable operation from –55°C to +175°C junction temperature. Polarity is marked by a cathode band on the DO-41 package, and it complies with UL 94V-0 flammability and JESD201 Class 2 whisker resistance standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Voltage | 6.8V - defines rated standoff threshold before avalanche conduction begins |
| Breakdown Voltage (VBR) | 6.46–7.14V @ 10mA - ensures predictable turn-on within tight tolerance for reliable overvoltage triggering |
| Working Stand-off Voltage (VWM) | 5.80V - maximum continuous DC or RMS voltage the device blocks without leakage exceeding 1000μA |
| Clamping Voltage (VC) | 10.5V @ 40A IPPM - limits transient voltage seen by downstream ICs during 400W 10/1000μs surge events |
| Peak Pulse Power (PPK) | 400W - sustains single non-repetitive transients per ANSI/IEEE C62.35 standard |
| Junction Temperature Range | –55°C to +175°C - supports under-hood automotive and high-temp industrial environments |
| Temperature Coefficient (VBR) | +0.057%/°C - quantifies positive drift in breakdown voltage with rising temperature for thermal margining |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, epoxy-molded case with UL 94V-0 rating and pure tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or common return path; forms cathode-to-anode forward path during clamping |
| Cathode | High-side transient input terminal | Marked with band; accepts surge energy and conducts avalanche current to anode when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power rating | Enables robust protection against IEC 61000-4-5 Level 4 (4kV) surges on 12V/24V systems |
| Clamping voltage ≤10.5V @ 40A | Keeps protected logic-level inputs (e.g., MCU GPIO, CAN transceivers) safely below absolute max ratings |
| Response time <1.0ps (unidirectional) | Activates faster than most ESD events (<1ns), preventing damage before system-level protection reacts |
| AEC-Q101 qualified option available | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and environmental requirements for global electronics manufacturing |
Applications
| Automotive Body Control Module | Industrial Sensor Interface |
|---|---|
Use Scenario: 12V battery rail exposed to load dump and alternator ripple in door module ECUs. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of LDO regulators and microcontrollers. Use Value: Limits transients to ≤10.5V, preventing latch-up or gate oxide damage in 5V/3.3V logic devices. |
Use Scenario: 24V analog sensor output line subject to inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Fast-acting shunt protector between signal and ground, placed adjacent to ADC input. Use Value: Clamps 40A surges within 1ps, preserving signal integrity and avoiding ADC saturation or reset. |
| LED Driver Power Input | RS-485 Transceiver Protection |
Use Scenario: Constant-current LED driver input subjected to hot-swap and cable discharge events. IC Role / Device Role / Timing Role: First-line TVS on VIN pin, absorbing energy before it reaches switching controller. Use Value: Withstands 400W pulses without degradation, extending driver lifetime in outdoor lighting systems. |
Use Scenario: RS-485 bus lines in factory automation exposed to EFT bursts and ground potential differences. IC Role / Device Role / Timing Role: Unidirectional TVS on each data line (A/B) referenced to local ground. Use Value: Maintains <5.80V standoff during normal operation while clamping EFT to <10.5V, preserving differential margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A | DO-214AA package, 600W rating, 10.5V clamping at 53.3A, lower capacitance (≈100pF) | Better suited for high-speed data lines due to smaller footprint and lower parasitic capacitance | Select SMBJ6.8A when board space is constrained or when protecting USB/UART lines requiring <150pF junction capacitance |
| 1.5KE6.8A | Higher 1500W rating, same DO-41 package, 10.5V clamping at 143A, higher leakage (≤5000μA) | Used where higher surge immunity (IEC 61000-4-5 Level 5) is mandated, e.g., telecom power entry | Choose 1.5KE6.8A only if system-level testing requires >400W surge handling; otherwise P4KE6.8A offers optimal cost/performance balance |
Compared with SMBJ6.8A and 1.5KE6.8A, the P4KE6.8A provides the best trade-off of compact DO-41 form factor, 400W capability, and low leakage for general-purpose 12V/24V rail protection-making it ideal for cost-sensitive automotive and industrial designs where PCB real estate and thermal budget are moderate.
Availability
P4KE6.8A is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, LED driver inputs, and RS-485 communication interfaces requiring stable component supply and long-term manufacturability.
Supply support for P4KE6.8A 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 qualification capabilities.
The P4KE series was developed to deliver standardized, high-reliability transient suppression for automotive and industrial power rails, emphasizing tight VBR tolerance, repeatable clamping, and extended temperature operation.
FAQ
What is the key difference between P4KE6.8 and P4KE6.8A?
The P4KE6.8A has tighter breakdown voltage tolerance (6.46–7.14V) versus P4KE6.8 (6.12–7.48V), achieved via enhanced binning. Both share identical DO-41 packaging, 400W rating, and 10.5V clamping voltage. The 'A' suffix indicates improved VBR consistency, making P4KE6.8A preferable for designs requiring precise overvoltage threshold control. This distinction is confirmed in TSC's N2104 datasheet revision across all P4KE voltage variants.
Is P4KE6.8A suitable for bidirectional transient protection?
No-P4KE6.8A is strictly unidirectional, with cathode marking and specified only for anode-ground configurations. For bidirectional protection, TSC offers P4KE6.8CA (center-tapped, symmetrical) or P4KE6.8C (bidirectional) variants. Using P4KE6.8A in reverse-biased mode risks permanent breakdown above its 5.80V VWM, as it lacks symmetric avalanche characteristics. Always verify polarity alignment in schematic capture.
What is the maximum allowable surge repetition rate for P4KE6.8A?
P4KE6.8A is rated for non-repetitive 10/1000μs surges per ANSI/IEEE C62.35. Its datasheet specifies derating above TA = 25°C (Fig.2) but does not define safe repetition frequency. In practice, thermal recovery requires ≥1 second between full-power pulses to avoid junction overheating. For repetitive transients, consider active clamping or higher-energy TVS families like SMAJ or SMCJ with documented duty-cycle limits.
Does P4KE6.8A meet AEC-Q101 stress test requirements?
The base P4KE6.8A is not AEC-Q101 qualified; however, TSC offers the P4KE6.8AH variant (with 'H' suffix) that undergoes full AEC-Q101-004 qualification including HTGB, AC-H3TRB, and temperature cycling. The 'H' version is explicitly listed in the ordering table and carries UL file #E-326243 with automotive-grade reliability data. Standard P4KE6.8A should be used only in non-automotive applications unless validated per customer-specific AEC protocols.
How does junction temperature affect the clamping performance of P4KE6.8A?
As junction temperature rises, P4KE6.8A's breakdown voltage increases at +0.057%/°C, causing VC to rise proportionally-e.g., at +125°C, VBR shifts ~5.7%, increasing clamping voltage by ~0.6V. This is accounted for in worst-case margining; TSC's Fig.2 shows steady-state power derating to 0.5W at +125°C ambient. Designers must ensure thermal resistance from junction-to-ambient remains ≤175°C/W to maintain TJ ≤175°C under sustained surge conditions.
P4KE6.8A 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):
- 5.8V
- Voltage - Breakdown (Min):
- 6.46V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 40A
- 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)
P4KE6.8A FAQ
1.How can I place an order for P4KE6.8A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE6.8A 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 P4KE6.8A reliable?
The price and inventory of P4KE6.8A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE6.8A is usually 5 days.
3.What payment methods are accepted for P4KE6.8A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE6.8A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE6.8A?
P4KE6.8A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE6.8A 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 P4KE6.8A?
For technical support, including P4KE6.8A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE6.8A requirements.
6.How does Aetrix verify that P4KE6.8A is sourced from the original manufacturer or authorized distributors?
All P4KE6.8A 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 P4KE6.8A meets industry standards.
7.What is the process for return or replacement of P4KE6.8A?
All P4KE6.8A units undergo pre-shipment inspection (PSI). If there is an issue with P4KE6.8A, 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 P4KE6.8A part is unused and in its original packaging.
Return procedure for P4KE6.8A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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