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Taiwan Semiconductor Corporation P4KE400A
- Part No.:
- P4KE400A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE400A.pdf
- Description:
- TVS DIODE 342VWM 548VC DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,434
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Product details
Overview
P4KE400A from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power rails and signal lines. It features a 400V peak pulse clamping voltage of 548V at 0.76A, 342V working stand-off voltage, and <1μA reverse leakage at rated VWM - enabling robust ESD and lightning surge immunity in industrial control and automotive subsystems.
For engineers reviewing the P4KE400A datasheet, P4KE400A pinout, P4KE400A application, or P4KE400A equivalent, key selection criteria include its DO-41 package compatibility, 10/1000μs waveform surge rating, unidirectional polarity marking, and AEC-Q101 qualification option (P4KE400AH).
Technical Context
The P4KE400A operates as a silicon avalanche diode with precise breakdown behavior defined at 1mA test current (VBR = 380–420V). Its clamping action limits transient energy by diverting surge current away from downstream circuitry when voltage exceeds VWM = 342V, maintaining low dynamic impedance during 400W peak pulse events.
It exhibits fast response (<1.0ps rise time from 0V to VBR), temperature-stable breakdown (0.110%/°C coefficient), and meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance standards - confirming suitability for high-reliability board-level protection where thermal derating and long-term stability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 342 V - Maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VBR @ IT=1mA | 380–420 V - Breakdown voltage range at 1mA test current; defines precise turn-on threshold |
| VC @ IPPM | 548 V at 0.76 A - Clamping voltage under 10/1000μs surge; determines maximum protected-circuit stress |
| PPK | 400 W - Peak pulse power handling per ANSI/IEEE C62.35; validates single-event surge robustness |
| ID @ VWM | <1 μA - Reverse leakage at working voltage; ensures minimal standby power loss and signal integrity |
| TJ max | +175°C - Maximum junction temperature; supports operation in under-hood or high-ambient industrial environments |
| Package | DO-204AL (DO-41) - Standard axial-leaded through-hole package with tin-plated leads, RoHS/halogen-free |
Pinout & Package
DO-204AL (DO-41) package: axial-leaded, glass-passivated silicon junction, cathode band marked on one end for unidirectional polarity identification. Leads are pure tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes conduction path during reverse-biased clamping |
| Cathode | High-side transient input terminal | Connected to protected line; avalanche breakdown initiates here when voltage exceeds VBR relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power | Enables protection against IEC 61000-4-5 Level 4 surges (4kV/2Ω) on 24–48V DC rails without cascading failure |
| <1.0ps response time | Ensures clamping activation before transient energy couples into sensitive IC inputs, critical for microcontroller I/O protection |
| AEC-Q101 qualified variant available | Validates reliability for automotive body electronics, infotainment power supplies, and ADAS sensor interfaces |
| UL Recognized (E326243) | Confirms compliance with safety standards for end-equipment certification in industrial and medical auxiliary systems |
| RoHS & halogen-free | Meets IPC-1752A material declaration requirements and EU Directive 2015/863 for sustainable manufacturing |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate driver ICs and optocouplers against inductive kickback from 24V solenoid/relay coils. IC Role / Device Role: Unidirectional TVS placed across coil terminals or between driver output and ground. Use Value: Limits flyback spikes to ≤548V, preventing gate oxide rupture in MOSFET drivers and ensuring >100,000-cycle relay reliability. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs from load dump and jump-start transients. IC Role / Device Role: Standoff protection on 12V supply rail upstream of LDO regulators and communication ICs. Use Value: Withstands 35V/1s load dump per ISO 7637-2 Pulse 5a while maintaining <1μA leakage at 13.5V nominal battery voltage. |
| Telecom Power Feeds | LED Streetlight Drivers |
|
Use Scenario: Input-stage surge suppression on PoE-powered network switches and remote PHY modules. IC Role / Device Role: Primary clamping element on 48V DC input before DC-DC converters and Ethernet PHYs. Use Value: Clamps 10/1000μs 1kV surges to 548V, reducing downstream TVS stress and eliminating need for multi-stage protection. |
Use Scenario: Overvoltage protection for constant-current LED driver ICs exposed to AC line transients via isolated flyback supplies. IC Role / Device Role: Secondary-side clamping on 350–400V DC bus feeding LED strings in outdoor luminaires. Use Value: Matches 400V nominal bus rating with 342V VWM and 548V VC, allowing direct integration without derating or series resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ400A | Same DO-214AC (SMA) package; 552V clamping at 0.75A; slightly higher VF in forward conduction | Surface-mount only; requires PCB rework for through-hole replacement | Select for space-constrained designs where SMT assembly is standard and thermal pad layout supports 400W dissipation |
| ON Semiconductor 1.5KE400A | Higher 1500W rating; larger DO-201AD package; 574V clamping at 0.7A; same VWM/VBR range | Over-specified for 400W use cases; adds mechanical and thermal margin but increases board area | Choose when future-proofing against higher-energy threats or when existing 1.5KE footprint is standardized in platform design |
Compared with P4KE400A, SMAJ400A offers SMT compatibility at the cost of through-hole drop-in capability, while 1.5KE400A provides greater surge headroom in a larger package - making P4KE400A the optimal balance of proven reliability, DO-41 legacy fit, and precise 400W system-level protection.
Availability
P4KE400A is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and LED streetlight drivers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4KE400A 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, specializing in power management, protection, and signal conditioning devices since 1979.
The P4KE series belongs to TSC's high-reliability TVS portfolio engineered specifically for industrial-grade surge immunity and automotive-qualified variants - targeting applications where consistent clamping performance and long-term parametric stability are non-negotiable.
FAQ
What is the clamping voltage of P4KE400A under a 10/1000μs surge?
The P4KE400A clamps to a maximum of 548 V when subjected to its rated peak pulse current of 0.76 A under the standard 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is P4KE400A unidirectional or bidirectional?
P4KE400A is a unidirectional TVS diode, indicated by its "A" suffix and cathode band marking. It conducts only during reverse-bias overvoltage conditions - ideal for DC power rail protection where polarity is fixed. Bidirectional variants (e.g., P4KE400CA) exist but are distinct part numbers with symmetrical breakdown in both directions.
Does P4KE400A meet automotive qualification standards?
The base P4KE400A is not AEC-Q101 qualified; however, the P4KE400AH variant - identical in electrical specs and DO-41 packaging - is fully AEC-Q101 certified. Engineers specifying P4KE400A for automotive use must select the "H" suffix version to ensure compliance with stress testing requirements for temperature cycling, humidity, and mechanical shock.
What is the maximum operating temperature for P4KE400A?
P4KE400A has a maximum junction temperature (TJ max) of +175°C and operates across a full range of –55°C to +175°C. This wide thermal envelope allows deployment in under-hood automotive modules, industrial PLCs near heat sources, and outdoor lighting enclosures - provided PCB copper area and ambient airflow support adequate thermal dissipation during repetitive surge events.
How does P4KE400A compare to P4KE400 in terms of electrical performance?
P4KE400A offers tighter VBR tolerance (380–420 V vs. 360–440 V for P4KE400) and lower clamping voltage (548 V vs. 574 V), resulting in improved protection margin for sensitive loads. Both share identical DO-41 packaging, 400W rating, and thermal specs - making P4KE400A the preferred choice when precision clamping and reduced let-through voltage are design priorities.
P4KE400A 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):
- 342V
- Voltage - Breakdown (Min):
- 380V
- Voltage - Clamping (Max) @ Ipp:
- 548V
- Current - Peak Pulse (10/1000µs):
- 760mA
- 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)
P4KE400A FAQ
1.How can I place an order for P4KE400A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE400A 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 P4KE400A reliable?
The price and inventory of P4KE400A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE400A is usually 5 days.
3.What payment methods are accepted for P4KE400A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE400A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE400A?
P4KE400A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE400A 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 P4KE400A?
For technical support, including P4KE400A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE400A requirements.
6.How does Aetrix verify that P4KE400A is sourced from the original manufacturer or authorized distributors?
All P4KE400A 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 P4KE400A meets industry standards.
7.What is the process for return or replacement of P4KE400A?
All P4KE400A units undergo pre-shipment inspection (PSI). If there is an issue with P4KE400A, 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 P4KE400A part is unused and in its original packaging.
Return procedure for P4KE400A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE400A Tags
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