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Taiwan Semiconductor Corporation P4KE39
- Part No.:
- P4KE39
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE39.pdf
- Description:
- 400W, 39V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,583
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Product details
Overview
P4KE39 from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 39 V, working stand-off voltage of 31.6 V, clamping voltage of 56.4 V at 7.4 A 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 P4KE39 datasheet, P4KE39 pinout, P4KE39 application, or P4KE39 equivalent, key selection criteria include its DO-41 package compatibility, 1 μA reverse leakage at 31.6 V, <1.0 ps response time from 0 V to VBR, UL 94V-0 molded case, and AEC-Q101 qualification availability for automotive-grade reliability validation.
Technical Context
The P4KE39 operates as a unidirectional avalanche diode with precise voltage clamping during transient events. Its 35.1–42.9 V breakdown range (tested at 1 mA) ensures robust turn-on margin above 31.6 V working voltage while maintaining low dynamic impedance under 10/1000 μs surge conditions.
It delivers 400 W peak pulse power per ANSI/IEEE C62.35 standard, with thermal derating to 1 W steady-state dissipation at 75°C lead temperature. The device exhibits a 0.100 %/°C VBR temperature coefficient and meets JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Voltage | 39 V - defines rated clamping threshold for system-level surge immunity design |
| Breakdown Voltage VBR | 35.1–42.9 V @ 1 mA - guarantees reliable avalanche conduction onset within specified tolerance band |
| Working Stand-off Voltage VWM | 31.6 V - maximum continuous DC or RMS voltage the device blocks without leakage exceeding 1 μA |
| Clamping Voltage VC | 56.4 V @ 7.4 A - peak voltage seen by protected circuit during 10/1000 μs surge, limiting downstream stress |
| Peak Pulse Power PPK | 400 W - energy-handling capacity for non-repetitive transients per industry-standard waveform |
| Junction Temperature Range | -55°C to +175°C - supports operation in under-hood automotive and industrial environments |
| Package | DO-204AL (DO-41) - axial-leaded through-hole package with tin-plated leads compliant to J-STD-002 |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, glass-passivated silicon junction, cathode indicated by band marking. Leads are pure tin-plated and solderable per J-STD-002; weight ≈ 0.300 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; forms current path during reverse-biased clamping |
| Cathode | High-side transient input terminal | Connected to protected line; avalanche conduction initiates here when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option available | Enables direct use in automotive electronics without additional qualification testing |
| 400 W surge capability (10/1000 μs) | Withstands high-energy EFT and load-dump transients common in 12 V/24 V vehicle systems |
| Response time <1.0 ps (0 V to VBR) | Engages before most IC damage mechanisms initiate, preserving signal integrity in fast-edge applications |
| UL 94V-0 flammability rating | Ensures flame-retardant encapsulation suitable for safety-critical and enclosed industrial enclosures |
| Reverse leakage <1 μA @ VWM | Minimizes standby power loss and avoids false triggering in low-power sensor or battery-backed circuits |
Applications
| Automotive Lighting Control | Industrial PLC Digital I/O |
|---|---|
|
Use Scenario: Protecting LED driver ICs and MOSFET gate drivers from load-dump spikes and inductive kickback in headlamp modules. IC Role / Device Role / Timing Role: Primary clamping element placed between supply rail and ground, absorbing >400 W surges within nanoseconds. Use Value: Prevents catastrophic failure of 39 V-rated driver ICs during ISO 7637-2 Pulse 5a events without requiring active regulation. |
Use Scenario: Safeguarding 24 V digital input cards against ESD and field-wiring transients in factory automation cabinets. IC Role / Device Role / Timing Role: Standoff protector on front-end terminals, shunting transients before signal conditioning circuitry. Use Value: Maintains ≤31.6 V operating window while clamping to 56.4 V, ensuring compatibility with 3.3 V/5 V logic interface thresholds. |
| DC Power Rail Protection | Communication Interface Line Protection |
|
Use Scenario: Securing 36 V nominal DC power distribution networks in telecom remote radio units and base station power supplies. IC Role / Device Role / Timing Role: Secondary overvoltage clamp downstream of primary DC-DC converters, handling repetitive switching noise. Use Value: Limits rail excursions to 56.4 V during 10/1000 μs surges, preventing latch-up or burnout in downstream PMICs and microcontrollers. |
Use Scenario: Shielding RS-485 transceivers and CAN bus nodes from EFT bursts and cable-induced surges in building management systems. IC Role / Device Role / Timing Role: Unidirectional TVS on VCC-to-ground and signal-to-ground paths, complementing bidirectional data-line protectors. Use Value: Provides asymmetric clamping aligned with supply rail polarity, reducing capacitive loading versus bidirectional alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | Bidirectional, 36 V VWM, SMC package, 600 W PPK | Requires dual-direction clamping; unsuitable where polarity-specific protection is needed | Select when protecting AC-coupled or differential signal lines with symmetrical voltage margins |
| 1.5KE39A | Same DO-41 package, 39 V nominal, but 1500 W PPK, higher VC = 60.2 V | Higher clamping voltage reduces protection margin for 3.3 V/5 V logic interfaces | Choose only when legacy board space constraints mandate DO-41 and higher surge energy must be absorbed |
Compared with SMBJ36A and 1.5KE39A, the P4KE39 offers tighter VC (56.4 V), lower leakage (<1 μA), and AEC-Q101 qualification path - making it optimal for cost-sensitive, space-constrained 39 V rail protection where precise clamping and automotive compliance matter.
Availability
P4KE39 is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC I/O protection, and DC power rail safeguarding requiring stable component supply across extended production lifecycles.
Supply support for P4KE39 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 high-reliability TVS portfolio engineered specifically for robust transient immunity in harsh-environment applications - emphasizing AEC-Q101 readiness, tight parametric tolerances, and UL-certified packaging.
FAQ
What is the maximum clamping voltage of the P4KE39 under standard surge conditions?
The P4KE39 clamps to a maximum of 56.4 V when subjected to a 10/1000 μs waveform with a peak pulse current of 7.4 A. This value is measured per ANSI/IEEE C62.35 and represents the highest voltage the protected circuit will experience during such a transient event. The P4KE39 maintains this clamping performance across its full operating temperature range of -55°C to +175°C.
Is the P4KE39 unidirectional or bidirectional, and how is polarity identified?
The P4KE39 is a unidirectional TVS diode, meaning it conducts only when reverse-biased beyond its breakdown voltage. Polarity is marked by a cathode band on the DO-41 package body - the banded end connects to the higher-potential side of the protected line. Bidirectional variants in the same family use "CA" suffixes (e.g., P4KE39CA), which the P4KE39 does not carry.
Does the P4KE39 meet automotive qualification standards?
The base P4KE39 is not AEC-Q101 qualified, but the P4KE39H variant - identical in electrical specs and DO-41 packaging - is fully AEC-Q101 qualified. The "H" suffix denotes automotive-grade screening and test compliance. For automotive applications requiring formal qualification, engineers should specify P4KE39H instead of P4KE39.
What is the reverse leakage current specification for the P4KE39 at its working voltage?
The P4KE39 exhibits a maximum reverse leakage current of 1 μA when biased at its working stand-off voltage of 31.6 V. This low leakage ensures minimal power loss in always-on circuits and prevents unintended biasing of downstream components. The value is guaranteed at TA = 25°C and remains below 5 μA up to TJ = 125°C per characterization data.
Can the P4KE39 be used in surface-mount designs?
No - the P4KE39 is exclusively offered in the axial-leaded DO-204AL (DO-41) through-hole package. It is not available in surface-mount formats such as SMA, SMB, or SMC. For SMT-compatible alternatives with similar 39 V clamping, consider the SMBJ39A (bidirectional) or SMCJ39A (unidirectional), both in DO-214AB packages.
P4KE39 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):
- 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)
P4KE39 FAQ
1.How can I place an order for P4KE39 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE39 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 P4KE39 reliable?
The price and inventory of P4KE39 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE39 is usually 5 days.
3.What payment methods are accepted for P4KE39?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE39 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE39?
P4KE39 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE39 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 P4KE39?
For technical support, including P4KE39 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE39 requirements.
6.How does Aetrix verify that P4KE39 is sourced from the original manufacturer or authorized distributors?
All P4KE39 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 P4KE39 meets industry standards.
7.What is the process for return or replacement of P4KE39?
All P4KE39 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE39, 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 P4KE39 part is unused and in its original packaging.
Return procedure for P4KE39:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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