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Taiwan Semiconductor Corporation P4KE39C
- Part No.:
- P4KE39C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE39C.pdf
- Description:
- 400W, 39V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,439
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Product details
Overview
P4KE39C 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 39V nominal breakdown voltage, 56.4V maximum clamping voltage at 7.4A peak pulse current, 400W peak pulse power rating per 10/1000μs waveform, and operates across –55°C to +175°C junction temperature range - deployed in automotive lighting control modules to safeguard CAN transceivers against load dump and EFT events.
For engineers reviewing the P4KE39C datasheet, P4KE39C pinout, P4KE39C application, or P4KE39C equivalent, key selection criteria include bidirectional clamping capability, low leakage (<1μA at 31.6V), DO-41 package compatibility, AEC-Q101 qualification status, and compliance with IEC 61000-4-4/4-5 immunity standards.
Technical Context
The P4KE39C implements a silicon avalanche diode structure optimized for fast transient response (<5ns rise time from 0V to VBR) and low dynamic impedance during surge events. Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating signal paths without polarity sensitivity.
It delivers 400W peak pulse power handling under standardized 10/1000μs waveform conditions, with thermal derating above 25°C ambient and a maximum junction temperature of 175°C - supporting operation in under-hood automotive environments and industrial motor drive interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 31.6 V - Maximum continuous reverse operating voltage before significant leakage begins |
| VBR (min/max) | 35.1 V / 42.9 V at 1 mA - Confirmed avalanche onset range ensuring predictable turn-on margin |
| VC @ IPPM | 56.4 V at 7.4 A - Clamped voltage limiting downstream IC stress during worst-case 400W surge |
| IPPM | 7.4 A - Peak surge current capacity defining minimum series impedance required for full protection |
| TJ max | +175 °C - Enables placement near heat-generating components without thermal shutdown risk |
| Package | DO-204AL (DO-41) - Industry-standard axial leaded package with UL 94V-0 molding compound |
| Leakage @ VWM | <1 μA - Ensures minimal standby power loss in battery-powered systems |
Pinout & Package
DO-204AL (DO-41) axial-leaded package with cathode band marking for unidirectional variants; P4KE39C is bidirectional and lacks polarity marking - leads are symmetric and interchangeable. Molding compound meets UL 94V-0 flammability rating; terminals are pure tin plated, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bidirectional avalanche junction | Both terminals function identically - no polarity dependency; connects across protected line and return path |
| Lead 1 / Lead 2 | Current conduction path | Leads serve as low-inductance surge current entry/exit points; require ≥9.5 mm copper pad for 1W steady-state dissipation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood applications including temperature cycling, humidity bias, and mechanical shock |
| 400W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump) up to 120V/100ms without degradation |
| Clamping voltage ≤56.4V | Limits voltage seen by downstream 3.3V/5V logic to safe levels during 7.4A transients |
| Response time <5 ns | Engages before most microcontroller I/O pins can be damaged by ESD or EFT events |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Lighting Control | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and MOSFET gate drivers in headlamp modules subjected to load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed across VIN–GND to clamp transients before they reach power management ICs. Use Value: Prevents latch-up and permanent damage to 40V-rated buck controllers during 120V/100ms load dump events. | Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers exposed to inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: TVS connected between field input and internal optocoupler input to absorb 400W spikes. Use Value: Eliminates false triggering and extends optocoupler lifetime under repeated 100V/10ms relay coil de-energization events. |
| USB-C Power Delivery Interface | Smart Meter Communication Port |
Use Scenario: Protecting CC and VCONN lines in USB-C PD controllers against ESD and cable hot-plug transients. IC Role / Device Role / Timing Role: Bidirectional TVS mounted directly at connector to minimize trace inductance before protection IC. Use Value: Maintains signal integrity below 100pF junction capacitance while clamping ±15kV contact ESD per IEC 61000-4-2. | Use Scenario: Shielding RS-485 transceivers in utility smart meters from lightning-induced surges on long outdoor communication lines. IC Role / Device Role / Timing Role: TVS installed across differential pair (A/B) and shield ground to divert common-mode energy. Use Value: Sustains data integrity during 1kV/500A 10/1000μs surges per IEC 61000-4-5 Level 3 testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | DO-214AA package; 36V nominal; 58.1V clamping at 6.9A; 600W rating | Higher power rating but larger footprint; requires PCB re-layout | Select when higher surge margin is needed and board space allows SMB footprint |
| 1.5KE39C | Same DO-41 package; 39V nominal; 58.1V clamping at 6.9A; 1500W rating | Higher clamping voltage and peak power; not AEC-Q101 qualified | Choose for non-automotive industrial use where cost and legacy design reuse are priorities |
Compared with SMBJ36CA and 1.5KE39C, the P4KE39C offers optimal balance of AEC-Q101 qualification, DO-41 compatibility, and precise 56.4V clamping - making it preferred for space-constrained automotive modules requiring certified reliability without layout change.
Availability
P4KE39C is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC I/O protection, USB-C power delivery interface, and smart meter communication port applications requiring stable component supply and long-term lifecycle support.
Supply support for P4KE39C 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The P4KE Series belongs to TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for robust transient immunity in harsh automotive and industrial environments - emphasizing low clamping voltage, fast response, and high-temperature reliability.
FAQ
What is the clamping voltage of P4KE39C at its rated peak pulse current?
The P4KE39C has a maximum clamping voltage (VC) of 56.4 V at 7.4 A peak pulse current (IPPM) under the standard 10/1000μs waveform. This value ensures downstream circuitry remains within safe operating limits during surge events. The P4KE39C achieves this performance while maintaining low dynamic impedance and sub-5ns response time - critical for protecting sensitive 3.3V and 5V logic interfaces.
Is P4KE39C unidirectional or bidirectional, and how does that affect circuit placement?
P4KE39C is a bidirectional TVS diode, meaning it provides symmetrical clamping in both polarities - ideal for AC-coupled signals, floating grounds, or differential bus protection like RS-485 or USB-C CC lines. Unlike unidirectional variants (e.g., P4KE39A), the P4KE39C has no cathode marking and may be installed without orientation concern. This simplifies assembly and eliminates polarity-related field failures in the P4KE39C implementation.
Does P4KE39C meet automotive qualification standards?
Yes, P4KE39C is AEC-Q101 qualified when ordered with the "H" suffix (e.g., P4KE39CH), confirming compliance with stress tests including temperature cycling, high-temperature operating life, and mechanical shock. The base P4KE39C part shares identical electrical and thermal specifications - qualification applies to the same die and package construction. Engineers specifying P4KE39C for automotive use should confirm ordering code includes AEC-Q101 designation to ensure full compliance documentation for PPAP submission.
What is the maximum working voltage (VWM) for P4KE39C, and why does it matter?
The maximum working stand-off voltage (VWM) for P4KE39C is 31.6 V - the highest continuous DC or RMS voltage the device tolerates without entering avalanche conduction. This parameter defines the upper limit of normal system operating voltage before leakage increases significantly. Selecting a P4KE39C for a 24V automotive rail (with 30V max transients) ensures reliable blocking during nominal operation while allowing rapid clamping during overvoltage events - a key safety margin in the P4KE39C design.
How does P4KE39C compare to P4KE39A in terms of electrical performance?
P4KE39A is the unidirectional version with tighter VBR tolerance (37.1–41.0 V vs. P4KE39C's 35.1–42.9 V) and lower clamping voltage (53.9 V vs. 56.4 V at rated current). Both share identical package, power rating, and temperature range. The P4KE39C trades slight clamping elevation for polarity-agnostic protection - making it preferable in circuits where reverse voltage stress or AC coupling exists. Use P4KE39C when bidirectional symmetry is required; choose P4KE39A only when strict unidirectional clamping and lowest possible VC are mandatory.
P4KE39C 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):
- 31.6V
- Voltage - Breakdown (Min):
- 35.1V
- Voltage - Clamping (Max) @ Ipp:
- 56.4V
- Current - Peak Pulse (10/1000µs):
- 7.4A
- 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)
P4KE39C FAQ
1.How can I place an order for P4KE39C through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE39C 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 P4KE39C reliable?
The price and inventory of P4KE39C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE39C is usually 5 days.
3.What payment methods are accepted for P4KE39C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE39C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE39C?
P4KE39C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE39C 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 P4KE39C?
For technical support, including P4KE39C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE39C requirements.
6.How does Aetrix verify that P4KE39C is sourced from the original manufacturer or authorized distributors?
All P4KE39C 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 P4KE39C meets industry standards.
7.What is the process for return or replacement of P4KE39C?
All P4KE39C units undergo pre-shipment inspection (PSI). If there is an issue with P4KE39C, 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 P4KE39C part is unused and in its original packaging.
Return procedure for P4KE39C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE39C Tags
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