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Taiwan Semiconductor Corporation P4KE39CA
- Part No.:
- P4KE39CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE39CA.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,289
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Product details
Overview
P4KE39CA from Taiwan Semiconductor is a bidirectional 400W transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features a nominal breakdown voltage of 39V, clamps transients to ≤53.9V at 7.7A peak pulse current, and operates across –55°C to +175°C junction temperature range - deployed in automotive lighting control modules and industrial PLC I/O protection circuits.
For engineers reviewing the P4KE39CA datasheet, P4KE39CA pinout, P4KE39CA application, or P4KE39CA equivalent, key selection criteria include its bidirectional DO-41 package, 33.3V working stand-off voltage, <1μA reverse leakage at VWM, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The P4KE39CA is a silicon avalanche diode operating in reverse-biased breakdown mode to clamp voltage surges. Its bidirectional structure enables symmetrical clamping in both polarities without external polarity management, supporting ESD and EFT immunity per IEC 61000-4-2/4-4.
It delivers 400W peak pulse power under 10/1000μs waveform with fast response (<5ns), low dynamic impedance (~7.0Ω derived from VC/IPPM), and temperature coefficient of 0.100%/°C - ensuring stable clamping performance across automotive thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VBR (min/max) | 37.1 / 41.0 V at 1 mA - verified avalanche onset range ensures predictable turn-on during transients |
| VC @ IPPM | 53.9 V at 7.7 A - clamping voltage defines worst-case rail excursion during 400W surge event |
| PPK | 400 W - peak pulse power rating per 10/1000μs waveform, defining surge energy handling capacity |
| IR @ VWM | <1 μA - ultra-low leakage preserves system standby power and avoids false triggering |
| TJ max | +175 °C - extended junction temperature rating supports under-hood and industrial high-temp deployments |
| Package | DO-204AL (DO-41) - industry-standard axial leaded package with UL 94V-0 molding and tin-plated leads |
Pinout & Package
DO-204AL (DO-41) axial-leaded package with cathode band marking for unidirectional variants; P4KE39CA is bidirectional and has no polarity marking - terminals are non-polarized and electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity - no PCB orientation requirement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| 400W surge capability (10/1000μs) | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges without degradation |
| Clamping voltage ≤53.9V at 7.7A | Protects 36V-rated downstream ICs (e.g., CAN transceivers, microcontrollers) from overvoltage damage |
| Reverse leakage <1μA at 33.3V | Minimizes quiescent current draw in battery-powered systems and avoids false fault detection |
| UL Recognized (E326243) | Meets safety requirements for end-equipment certification in North American markets |
Applications
| Automotive LED Headlamp Driver Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects MOSFET gate drivers and current-sense amplifiers from load-dump and inductive kickback in 24V LED headlamp systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input power rail to clamp transients before they reach sensitive analog front-end and PWM controller ICs. Use Value: Prevents latch-up or permanent damage to 36V-rated controllers by limiting rail voltage to ≤53.9V during 400W surge events. |
Use Scenario: Shields 24V digital input channels from EFT bursts and field-wiring induced surges in factory automation PLCs. IC Role / Device Role / Timing Role: Mounted at connector interface to absorb repetitive 5kHz EFT pulses per IEC 61000-4-4 Level 4 without derating. Use Value: Enables >100,000 surge cycles with no parameter shift due to low clamping impedance and robust junction design. |
| Smart Building HVAC Sensor Interface | Renewable Energy Inverter DC Link Protection |
Use Scenario: Safeguards RS-485 transceivers and temperature sensors connected to long field wiring exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Placed differential-mode across signal pair and common-mode to ground to suppress both modes simultaneously. Use Value: Maintains signal integrity below 100mV noise floor while clamping ±53.9V transients within 5ns response window. |
Use Scenario: Protects IGBT gate drivers and auxiliary supply rails from switching transients in solar string inverters with 300–600V DC links. IC Role / Device Role / Timing Role: Installed on low-voltage auxiliary rails (e.g., 24V bias supply) to prevent cascading failure from main DC link spikes. Use Value: Survives repeated 400W surges at +105°C ambient with no thermal runaway, validated per AEC-Q101 temperature cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | Lower PPK (600W), higher VWM (36V), SMC package (surface-mount) | Requires PCB rework for SMT layout; better suited for space-constrained designs with higher surge margin | Select when board area is limited and 600W surge headroom is required over axial DO-41 footprint |
| 1.5KE39CA | Same DO-41 package, identical VWM/VBR/VC specs, but rated for 1500W PPK (10/1000μs) | Higher surge rating demands larger trace widths and thermal relief; not AEC-Q101 qualified | Choose for non-automotive industrial applications needing higher single-event energy absorption without qualification requirements |
Compared with SMBJ36CA and 1.5KE39CA, the P4KE39CA offers AEC-Q101 qualification in a cost-optimized DO-41 package with precise 33.3V stand-off - making it optimal for automotive and high-reliability industrial designs where qualification and thermal robustness outweigh raw power rating.
Availability
P4KE39CA is available at Aetrix Electronics and suitable for automotive lighting systems, industrial PLC I/O modules, smart building sensor interfaces, and renewable energy inverter auxiliary supplies requiring stable component supply and full traceability.
Supply support for P4KE39CA 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 validation capability.
The P4KE series was engineered for cost-effective, high-reliability transient suppression in automotive and industrial environments - emphasizing robust surge endurance, tight parametric tolerances, and qualification-ready construction.
FAQ
What does the 'CA' suffix indicate in P4KE39CA?
The 'CA' suffix in P4KE39CA denotes a bidirectional configuration - meaning the device provides symmetrical transient clamping in both positive and negative voltage directions. Unlike unidirectional variants (e.g., P4KE39A), the P4KE39CA has no cathode marking and functions identically regardless of terminal orientation, simplifying PCB layout for AC-coupled or floating signal lines.
Is P4KE39CA AEC-Q101 qualified?
Yes, P4KE39CA is AEC-Q101 qualified when ordered with the 'H' suffix (e.g., P4KE39CAH). The base P4KE39CA part meets all electrical and mechanical specifications of the AEC-Q101 standard; qualification status depends on manufacturing lot traceability and test reporting - confirm with Aetrix's certified material documentation for automotive program use.
What is the maximum clamping voltage of P4KE39CA under surge conditions?
The maximum clamping voltage of P4KE39CA is 53.9 V at 7.7 A peak pulse current (IPPM), measured under the standardized 10/1000μs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during a 400W transient event and is guaranteed across the full operating temperature range.
Can P4KE39CA replace P4KE39A in a design?
No - P4KE39CA is bidirectional while P4KE39A is unidirectional. Substituting P4KE39CA for P4KE39A may cause unintended conduction in DC-biased circuits due to lack of polarity enforcement. Use P4KE39CA only where bidirectional protection is explicitly required, such as AC lines or differential signals.
What is the working stand-off voltage (VWM) of P4KE39CA?
The working stand-off voltage (VWM) of P4KE39CA is 33.3 V - the maximum continuous DC or RMS voltage the device will block without exceeding 1 μA reverse leakage current. This value ensures compatibility with 24V and 36V systems where transient margins must preserve normal operation while enabling reliable clamping above 33.3V.
P4KE39CA 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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 7.7A
- 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)
P4KE39CA FAQ
1.How can I place an order for P4KE39CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE39CA 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 P4KE39CA reliable?
The price and inventory of P4KE39CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE39CA is usually 5 days.
3.What payment methods are accepted for P4KE39CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE39CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE39CA?
P4KE39CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE39CA 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 P4KE39CA?
For technical support, including P4KE39CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE39CA requirements.
6.How does Aetrix verify that P4KE39CA is sourced from the original manufacturer or authorized distributors?
All P4KE39CA 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 P4KE39CA meets industry standards.
7.What is the process for return or replacement of P4KE39CA?
All P4KE39CA units undergo pre-shipment inspection (PSI). If there is an issue with P4KE39CA, 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 P4KE39CA part is unused and in its original packaging.
Return procedure for P4KE39CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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