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Taiwan Semiconductor Corporation P4KE68CA
- Part No.:
- P4KE68CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE68CA.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,893
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Product details
Overview
P4KE68CA from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features a 68V nominal standoff voltage, 98V maximum clamping voltage at 4.2A peak pulse current, 400W peak pulse power rating per 10/1000μs waveform, and DO-204AL (DO-41) axial package - deployed in automotive lighting control modules to protect CAN transceiver inputs from load dump and EFT events.
For engineers reviewing the P4KE68CA datasheet, P4KE68CA pinout, P4KE68CA application, or P4KE68CA equivalent, key selection criteria include bidirectional clamping symmetry, low leakage (<1μA at 55.1V), fast response (<5ns), AEC-Q101 qualification, and compatibility with 75°C board-level thermal environments.
Technical Context
The P4KE68CA operates as a voltage-clamped avalanche diode with symmetrical breakdown behavior in both polarities, enabling robust protection against bipolar transients such as ESD, EFT, and inductive switching spikes. Its VBR min/max of 61.2V–74.8V at 1mA test current ensures precise triggering relative to 68V system rails.
Clamping performance is defined by VC = 98V at IPPM = 4.2A under 10/1000μs waveform, delivering predictable overvoltage limiting without latch-up. The device sustains operation across –55°C to +175°C junction temperature range and exhibits a VBR temperature coefficient of 0.104%/°C - critical for stable clamping in under-hood automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 55.1 V - Maximum continuous reverse operating voltage before significant leakage; sets safe margin below 68V nominal rail. |
| VBR @ IT=1mA | 61.2–74.8 V - Breakdown voltage range defining reliable turn-on threshold for bidirectional surges. |
| VC @ IPPM | 98 V - Clamping voltage at 4.2A peak pulse current; limits downstream IC stress during 400W transient events. |
| PPK | 400 W - Peak pulse power handling per 10/1000μs waveform; meets IEC 61000-4-5 Level 4 surge immunity requirements. |
| ID @ VWM | <1 μA - Ultra-low reverse leakage ensures minimal standby power loss and no false triggering in low-current systems. |
| TJ max | +175 °C - Enables placement near heat sources (e.g., power MOSFETs, LED drivers) without derating concerns. |
| Package | DO-204AL (DO-41) - Industry-standard axial leaded package with tin-plated leads compliant to J-STD-002 solderability. |
Pinout & Package
DO-204AL (DO-41) axial package with cathode band marking for unidirectional variants; P4KE68CA is bidirectional and has no polarity marking - terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal accepts positive or negative transients; no PCB orientation dependency required. |
| Lead 1 / Lead 2 | Current path for surge conduction | Leads conduct full IPPM (4.2A) during clamping; require ≥0.375" (9.5mm) copper pad thermal relief per JEDEC standards. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HAST, and mechanical shock - suitable for under-hood ECUs. |
| 400W 10/1000μs surge rating | Withstands IEC 61000-4-5 combination wave surges up to 4kV open-circuit / 2kA short-circuit without degradation. |
| Clamping voltage ≤98V at 4.2A | Ensures protected ICs (e.g., RS-485 transceivers, microcontrollers) remain below absolute maximum ratings during worst-case transients. |
| Response time <5ns | Activates faster than most microcontroller I/O structures, preventing latch-up or gate oxide damage from nanosecond-scale ESD events. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and UL 94V-0 flammability standard - supports green manufacturing and end-of-life compliance. |
Applications
| Automotive Lighting Control | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and LED driver ICs in headlamp modules subjected to load dump (ISO 7637-2 Pulse 5a) and EFT (IEC 61000-4-4). IC Role / Device Role: Bidirectional clamping element placed between power rail and ground, shunting surge energy away from sensitive analog front-ends. Use Value: Maintains VWM = 55.1V margin below 68V battery rail while clamping to ≤98V - preserving 12V logic interface integrity during 100V+ transients. |
Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role: Primary TVS on field-side input traces, positioned upstream of optocoupler or Schmitt trigger input stages. Use Value: Limits induced voltage spikes to ≤98V within 5ns, preventing false triggering or latch-up in industrial-grade microcontrollers operating at 24V ±10%. |
| DC Power Rail Protection | ESD-Sensitive Sensor Interface |
|
Use Scenario: Guarding 68V DC-DC converter outputs in telecom power systems against coupling from adjacent AC/DC stages or lightning-induced surges. IC Role / Device Role: Secondary-stage TVS parallel to bulk output capacitor, absorbing residual energy not filtered by upstream LC networks. Use Value: Delivers 400W peak power dissipation without thermal runaway - validated for continuous operation at TJ = 125°C with proper PCB copper area. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) connected to ADC inputs in medical instrumentation subject to human-body-model ESD. IC Role / Device Role: Low-capacitance (<50pF at VR=0V) bidirectional clamp on differential sensor lines, minimizing signal distortion. Use Value: Provides sub-5ns response and <1μA leakage at 55.1V - preserving sensor accuracy and battery life in low-power portable devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA | Lower PPK (600W), higher IPPM (9.9A), tighter VBR tolerance (64V ±5%), SMC package (surface-mount). | Requires PCB rework for SMT layout; better suited for space-constrained designs with higher surge duty cycles. | Select SMBJ64CA when board real estate is limited and surge repetition rate exceeds 1 pulse/minute. |
| 1.5KE68CA | Same DO-41 package, identical VWM/VBR/VC specs, but rated for 1500W PPK (10/1000μs) and higher IPPM (21.7A). | Overqualified for 400W use cases; larger junction capacitance may affect high-speed signal integrity. | Choose 1.5KE68CA only if legacy design requires backward compatibility with 1.5kW surge testing protocols. |
Compared with SMBJ64CA and 1.5KE68CA, P4KE68CA offers optimal balance of axial through-hole manufacturability, AEC-Q101 qualification, and 400W-rated clamping - making it ideal for cost-sensitive automotive and industrial assemblies where DO-41 footprint and proven reliability are prioritized over ultra-high surge capacity or SMT density.
Availability
P4KE68CA is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC I/O protection, DC power rail safeguarding, and ESD-sensitive sensor interface applications requiring stable component supply across multi-year production cycles.
Supply support for P4KE68CA 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 - headquartered in Hsinchu Science Park, Taiwan.
The P4KE series was engineered specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 compliance, high-temperature stability, and repeatable clamping performance under repetitive surge stress.
FAQ
What does the 'CA' suffix indicate in P4KE68CA?
The 'CA' suffix in P4KE68CA denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional 'A' variants (e.g., P4KE68A), P4KE68CA has no cathode marking and functions identically regardless of terminal orientation. This makes P4KE68CA especially suitable for AC-coupled lines, differential buses, or any application where polarity reversal is possible during fault conditions.
Is P4KE68CA AEC-Q101 qualified?
Yes, P4KE68CA is AEC-Q101 qualified when ordered with the 'H' suffix (e.g., P4KE68CAH). The base P4KE68CA part meets all electrical specifications in the AEC-Q101 test plan, including temperature cycling, highly accelerated stress test (HAST), and mechanical shock. For automotive production, specify P4KE68CAH to ensure full qualification documentation and lot traceability - critical for Tier 1 supplier audits and PPAP submissions.
What is the maximum clamping voltage of P4KE68CA and under what test condition?
The maximum clamping voltage of P4KE68CA is 98 V, measured at a peak pulse current (IPPM) of 4.2 A using the standardized 10/1000 μs double-exponential waveform per ANSI/IEEE C62.35. This value represents worst-case voltage seen by downstream circuitry during a 400W transient event - ensuring protected components remain within their absolute maximum voltage ratings even under full-rated surge stress.
Can P4KE68CA be used in place of P4KE68A in a design?
No - P4KE68CA and P4KE68A are not interchangeable without circuit review. P4KE68A is unidirectional with a cathode band and conducts only in reverse bias, while P4KE68CA is bidirectional and clamps in both directions. Substituting P4KE68CA for P4KE68A on a DC rail could cause unintended forward conduction or alter biasing in sensitive analog circuits. Always verify polarity requirements and transient directionality before replacement.
What is the junction-to-ambient thermal resistance (RθJA) for P4KE68CA in DO-41 package?
Taiwan Semiconductor does not publish RθJA for P4KE68CA in standard datasheet conditions; instead, thermal performance is specified via steady-state power derating curves. At TL = 75°C (lead temperature), P4KE68CA sustains 1 W continuous dissipation when mounted on 5 × 5 mm copper pads per lead. For accurate thermal modeling, use the junction-to-lead resistance (RθJL ≈ 25°C/W) and apply IPC-2152 guidelines for PCB copper area - typical RθJA ranges from 120°C/W (minimal copper) to 65°C/W (optimized 1-in² 2oz copper).
P4KE68CA 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):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 4.5A
- 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)
P4KE68CA FAQ
1.How can I place an order for P4KE68CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE68CA 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 P4KE68CA reliable?
The price and inventory of P4KE68CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE68CA is usually 5 days.
3.What payment methods are accepted for P4KE68CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE68CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE68CA?
P4KE68CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE68CA 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 P4KE68CA?
For technical support, including P4KE68CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE68CA requirements.
6.How does Aetrix verify that P4KE68CA is sourced from the original manufacturer or authorized distributors?
All P4KE68CA 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 P4KE68CA meets industry standards.
7.What is the process for return or replacement of P4KE68CA?
All P4KE68CA units undergo pre-shipment inspection (PSI). If there is an issue with P4KE68CA, 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 P4KE68CA part is unused and in its original packaging.
Return procedure for P4KE68CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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