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Taiwan Semiconductor Corporation P4KE400
- Part No.:
- P4KE400
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE400.pdf
- Description:
- 400W, 400V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,681
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Product details
Overview
P4KE400 from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode designed for primary-side overvoltage protection in power supply inputs, DC bus lines, and industrial control interfaces. It features a 400V maximum clamping voltage at 0.73A peak pulse current, 324V working stand-off voltage, and 360–440V breakdown range at 1mA test current - enabling robust surge immunity per IEC 61000-4-5 Level 4 in 24/48V system rails.
For engineers reviewing the P4KE400 datasheet, P4KE400 pinout, P4KE400 application, or P4KE400 equivalent, key selection criteria include its DO-41 package compatibility with high-reliability board layouts, low leakage (<1μA at 324V), fast 1.0ps response time from 0V to VBR, and AEC-Q101 qualification option (P4KE400H) for automotive-grade transient suppression.
Technical Context
The P4KE400 operates as a silicon avalanche diode with unidirectional polarity, triggered when transient voltage exceeds its 360–440V breakdown range. Its clamping action limits downstream voltage to ≤574V at 0.73A (10/1000μs waveform), maintaining circuit integrity during lightning-induced surges or inductive switching events.
Thermal performance is defined by a 175°C maximum junction temperature and 1W steady-state power dissipation at 75°C lead temperature. The device exhibits a +0.110%/°C temperature coefficient of VBR, ensuring predictable voltage drift across industrial operating ranges (-55°C to +175°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 400W at 10/1000μs waveform - sustains single-event surges up to 400W without failure |
| Working Stand-off Voltage (VWM) | 324V - maximum continuous DC or RMS voltage before leakage exceeds 1μA |
| Breakdown Voltage (VBR) | 360–440V at 1mA - precise avalanche threshold defining turn-on sensitivity |
| Clamping Voltage (VC) | 574V at 0.73A peak pulse - maximum voltage seen by protected circuit during surge |
| Junction Temperature Range | -55°C to +175°C - supports operation in under-hood automotive, industrial motor drives, and outdoor power systems |
| Response Time | <1.0ps from 0V to VBR - enables sub-nanosecond reaction to fast-rising transients |
| Leakage Current | <1μA at 324V - minimizes standby power loss in always-on systems |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, epoxy-molded case with UL 94V-0 flammability rating and pure tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or common return path; defines unidirectional conduction direction |
| Cathode | High-side surge input terminal | Marked with band; accepts transient energy and clamps voltage relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available | P4KE400H meets automotive stress testing for engine control, body electronics, and ADAS power rails |
| Low dynamic impedance | Enables tight clamping ratio (VC/VBR ≈ 1.6) for minimal overvoltage margin in safety-critical designs |
| UL recognition (E-326243) | Validates compliance with UL 1449 for surge protective devices in commercial/industrial equipment |
| RoHS & halogen-free | Meets IEC 61249-2-21 and environmental directives for green manufacturing and end-of-life handling |
| JEDEC JESD201 Class 2 whisker resistance | Prevents tin whisker growth in long-life applications such as telecom infrastructure and railway signaling |
Applications
| Industrial Motor Drives | Telecom Power Feeds |
|---|---|
|
Use Scenario: Protection of 48V DC input stage against inductive kickback from relay coils and contactor switching. IC Role / Device Role / Timing Role: Primary surge shunt element placed directly across input terminals before EMI filter. Use Value: Limits transient voltage to ≤574V, preventing damage to upstream rectifiers and downstream DC-DC controllers. |
Use Scenario: Surge suppression on -48V telecom power distribution boards exposed to lightning-induced ground potential rise. IC Role / Device Role / Timing Role: Unidirectional clamping diode referenced to system ground, absorbing positive-going transients. Use Value: Withstands 400W surges per IEC 61000-4-5 while maintaining <1μA leakage at nominal -48V rail. |
| Automotive Body Control Modules | Renewable Energy Inverters |
|
Use Scenario: Input protection for 12V/24V BCM microcontrollers subjected to load dump pulses per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: First-line defense on battery feed line, placed ahead of TVS arrays and polymeric PTCs. Use Value: AEC-Q101-qualified P4KE400H variant ensures reliability under thermal cycling and vibration stress. |
Use Scenario: DC-link overvoltage clamp in solar string inverters where PV array transients exceed 400V. IC Role / Device Role / Timing Role: Standoff-rated TVS on high-voltage DC bus (350–600V range), sized for 10/1000μs threat profile. Use Value: 324V VWM provides 20% margin above 270V nominal string voltage, avoiding false triggering. |
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; 400W rating; VBR = 447–494V; VC = 644V at 0.62A | Higher clamping voltage (+12%) and lower IPPM (0.62A vs. 0.73A) reduce protection margin in high-energy surge environments | Select when SMA surface-mount layout is required and higher VC is acceptable for downstream voltage tolerance |
| Vishay 1.5KE400A | Same DO-201AD package; 1500W rating; VBR = 428–472V; VC = 594V at 2.53A | Higher power rating enables multi-pulse capability but requires larger PCB footprint and thermal management | Choose for applications needing repeated surge endurance or higher peak current handling beyond single-event 400W |
Compared with P4KE400, SMAJ400A trades lower clamping performance for SMT compatibility, while 1.5KE400A delivers greater surge capacity at the cost of larger through-hole packaging and increased board area - making P4KE400 optimal for cost-sensitive, space-constrained 400W single-pulse protection.
Availability
P4KE400 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power feeds, automotive body control modules, and renewable energy inverters requiring stable component supply with full traceability and lifecycle support.
Supply support for P4KE400 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 industrial, automotive, and consumer markets since 1979.
The P4KE series belongs to TSC's high-reliability TVS portfolio engineered specifically for IEC 61000-4-5 and ISO 7637-2 compliance in harsh-environment power interface protection.
FAQ
What is the maximum clamping voltage of the P4KE400 under standard surge conditions?
The P4KE400 has a maximum clamping voltage (VC) of 574V at 0.73A peak pulse current under the 10/1000μs waveform per IEC 61000-4-5. This value is measured with specified test conditions and represents the highest voltage the P4KE400 allows to pass through to protected circuitry during a standardized surge event. Designers must ensure downstream components tolerate this clamping level.
Is the P4KE400 suitable for bidirectional transient suppression?
No, the P4KE400 is a unidirectional TVS diode intended only for suppression of positive-going transients relative to ground. For bidirectional protection, the P4KE400CA variant (with "CA" suffix) must be used - it provides symmetrical clamping in both polarities and is explicitly rated for bipolar applications per the manufacturer's documentation.
Does the P4KE400 meet automotive qualification standards?
The base P4KE400 is not AEC-Q101 qualified; however, the P4KE400H variant - indicated by the "H" suffix in the ordering code - is fully AEC-Q101 qualified and tested for automotive applications including engine control units and body electronics. Always verify the full part number suffix when selecting for automotive use.
What is the leakage current specification for the P4KE400 at its working stand-off voltage?
The P4KE400 exhibits a maximum reverse leakage current (ID) of 1μA when biased at its rated working stand-off voltage of 324V. This low leakage ensures minimal power loss in always-on systems and avoids false triggering in high-impedance sensing circuits downstream of the P4KE400.
How does the P4KE400 compare to the 1.5KE400A in terms of surge handling capability?
The P4KE400 is rated for 400W peak pulse power, while the 1.5KE400A handles 1500W - reflecting a fundamental difference in energy absorption capacity. The 1.5KE400A achieves this with higher peak pulse current (2.53A vs. 0.73A) and a larger DO-201AD package, making it suitable for multi-pulse or higher-energy threats where the P4KE400 would be insufficient.
P4KE400 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):
- 324V
- Voltage - Breakdown (Min):
- 360V
- Voltage - Clamping (Max) @ Ipp:
- 574V
- Current - Peak Pulse (10/1000µs):
- 730mA
- 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)
P4KE400 FAQ
1.How can I place an order for P4KE400 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE400 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 P4KE400 reliable?
The price and inventory of P4KE400 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE400 is usually 5 days.
3.What payment methods are accepted for P4KE400?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE400 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE400?
P4KE400 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE400 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 P4KE400?
For technical support, including P4KE400 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE400 requirements.
6.How does Aetrix verify that P4KE400 is sourced from the original manufacturer or authorized distributors?
All P4KE400 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 P4KE400 meets industry standards.
7.What is the process for return or replacement of P4KE400?
All P4KE400 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE400, 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 P4KE400 part is unused and in its original packaging.
Return procedure for P4KE400:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE400 Tags
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