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Taiwan Semiconductor Corporation P4KE300
- Part No.:
- P4KE300
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE300.pdf
- Description:
- 400W, 300V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,374
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Product details
Overview
P4KE300 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 300 V, clamps transients to ≤430 V at 0.97 A peak pulse current, and operates across –55°C to +175°C junction temperature range - ideal for automotive power supply input protection and industrial control I/O surge hardening.
For engineers reviewing the P4KE300 datasheet, P4KE300 pinout, P4KE300 application, or P4KE300 equivalent, key selection criteria include its DO-204AL (DO-41) axial package, 243 V working stand-off voltage, <1 μA reverse leakage at rated VWM, 10/1000 μs waveform capability, and AEC-Q101 qualification option (P4KE300H).
Technical Context
The P4KE300 functions as a silicon avalanche diode with fast clamping response (<1.0 ps rise time from 0 V to VBR), low dynamic impedance, and stable breakdown voltage temperature coefficient of 0.110 %/°C. Its unidirectional polarity enables asymmetric protection where forward conduction must be blocked except during surge events.
Rated for 400 W non-repetitive peak pulse power per 10/1000 μs waveform, it dissipates up to 1 W steady-state power at 75°C lead temperature and withstands 40 A single half-sine forward surge current (8.3 ms). The device meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min / max | 270 V / 330 V at 1 mA test current - defines reliable avalanche initiation window under surge conditions |
| VWM | 243 V - maximum continuous DC or RMS operating voltage before significant leakage begins |
| IPPM | 0.97 A - peak pulse current at which clamping voltage is guaranteed ≤430 V |
| VC@IPPM | 430 V - maximum clamped voltage seen by protected circuit during specified surge event |
| PPK | 400 W - peak transient power handling capacity per 10/1000 μs standard waveform |
| TJ max | +175 °C - maximum junction temperature enabling operation in under-hood or high-ambient industrial environments |
| Package | DO-204AL (DO-41) - industry-standard axial-leaded package with tin-plated leads, RoHS and halogen-free compliant |
Pinout & Package
DO-204AL (DO-41) axial package with cathode band marking. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance. Polarity is marked via cathode band; anode and cathode terminals are not interchangeable in unidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference node for unidirectional clamping | Connected to system ground or lower-potential rail; conducts only during reverse-biased surge events |
| Cathode | Protected line connection | Connected to line being protected (e.g., 24 V supply rail); blocks normal operation but avalanches during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Avalanche clamping speed | <1.0 ps response from 0 V to VBR - ensures protection before sensitive downstream ICs experience overstress |
| Low leakage at VWM | <1 μA at 243 V - minimizes standby power loss and avoids false triggering in high-impedance circuits |
| Surge robustness | 400 W peak pulse power (10/1000 μs) - handles common EFT and lightning-induced surges per IEC 61000-4-5 Level 3 |
| High-temp reliability | –55°C to +175°C operating range - supports under-hood automotive, motor drive, and industrial power applications |
| Regulatory compliance | UL Recognized (E326243), RoHS, halogen-free (IEC 61249-2-21), AEC-Q101 qualified variant available |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary clamping device placed at power entry point before DC-DC converters and microcontrollers. Use Value: Limits transients to ≤430 V while maintaining 243 V stand-off - prevents damage to 36 V-rated input stages without derating margin loss. |
Use Scenario: 24 V digital input modules receiving signals from field sensors and switches in factory automation. IC Role / Device Role / Timing Role: Standoff protector on isolated input channels subjected to EFT bursts and inductive kickback. Use Value: Sub-μA leakage preserves high-impedance sensing integrity; 0.97 A IPPM rating matches typical PLC input surge test profiles. |
| AC/DC Adapter Output Protection | Telecom Power Feeds |
|
Use Scenario: Secondary-side 300 V output rails in offline SMPS used in LED drivers or industrial power supplies. IC Role / Device Role / Timing Role: Overvoltage clamp against transformer regulation failure or feedback loop faults. Use Value: 300 V nominal breakdown aligns with 243 V working voltage - provides 23% headroom above nominal output while avoiding false triggering. |
Use Scenario: Central office power feeds delivering -48 V DC with superimposed AC ringing and lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS on feed line to protect upstream rectifiers and monitoring ICs. Use Value: 430 V clamping voltage ensures safe margin below 600 V isolation barrier ratings; DO-41 package allows through-hole mounting on telecom backplanes. |
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 SMAJ300A | Same 300 V nominal, 400 W rating, DO-214AC (SMA) surface-mount package - 2.5 mm × 4.5 mm footprint vs. axial DO-41 | Requires PCB re-layout; better suited for space-constrained designs with automated assembly | Select when board real estate is limited and SMT process is established; verify thermal relief pad design for 1 W dissipation |
| ON Semiconductor 1.5KE300A | Same electrical specs (300 V VBR, 430 V VC, 400 W), but larger DO-201AD (axial) package - 5.2 mm diameter vs. DO-41's 2.7 mm | Higher thermal mass allows marginally better repetitive surge handling; requires larger cutout and lead spacing | Select when higher surge endurance margin is needed or legacy 1.5KE footprint compatibility is required |
Compared with P4KE300, SMAJ300A offers compact SMT integration at the cost of manual rework difficulty and different thermal path, while 1.5KE300A trades smaller size for improved thermal inertia and legacy design continuity - all three share identical clamping performance but differ in mechanical implementation and assembly flow.
Availability
P4KE300 is available at Aetrix Electronics and suitable for automotive power input protection, industrial PLC I/O hardening, and telecom power feed surge suppression requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for P4KE300 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 diode product line, engineered specifically for robust transient immunity in harsh-environment applications including automotive power systems and industrial control interfaces.
FAQ
What is the maximum clamping voltage of the P4KE300 under standard surge conditions?
The P4KE300 clamps to a maximum of 430 V when subjected to its rated peak pulse current of 0.97 A under the 10/1000 μs waveform. This value is measured at the device terminals and represents the upper limit of voltage imposed on the protected circuit during a defined transient event. The P4KE300 maintains this clamping performance across its full operating temperature range from –55°C to +175°C.
Is the P4KE300 suitable for bidirectional surge protection?
No, the P4KE300 is a unidirectional TVS diode and is not rated for bidirectional operation. Its electrical characteristics - including breakdown voltage, clamping behavior, and polarity marking - apply only in the reverse-biased direction. For bidirectional protection, select the P4KE300CA variant or equivalent bipolar TVS devices explicitly specified for symmetrical clamping in both polarities.
Does the P4KE300 meet AEC-Q101 qualification requirements?
The base P4KE300 is not AEC-Q101 qualified; however, the P4KE300H variant - identified by the "H" suffix in the ordering code - is fully AEC-Q101 qualified and tested per stress test conditions for automotive discrete semiconductors. Both share identical electrical parameters, but only P4KE300H carries the qualification documentation required for automotive powertrain and body electronics applications.
What is the reverse leakage current specification for the P4KE300 at its working voltage?
The P4KE300 exhibits a maximum reverse leakage current (ID) of 1 μA when biased at its working stand-off voltage (VWM) of 243 V. This low leakage ensures minimal power loss in standby mode and avoids interference with high-impedance sensing circuits. The specification is guaranteed at 25°C ambient and remains well below 10 μA across the full –55°C to +125°C operating range.
Can the P4KE300 be used in parallel for higher surge current handling?
Parallel connection of P4KE300 devices is not recommended due to mismatch in breakdown voltage (270–330 V range) and dynamic impedance, which causes uneven current sharing and potential thermal runaway. For higher surge capability, select a single higher-power TVS (e.g., 1500 W series) or implement coordinated staged protection with upstream current-limiting elements rather than paralleling P4KE300 units.
P4KE300 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):
- 243V
- Voltage - Breakdown (Min):
- 270V
- Voltage - Clamping (Max) @ Ipp:
- 430V
- Current - Peak Pulse (10/1000µs):
- 970mA
- 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)
P4KE300 FAQ
1.How can I place an order for P4KE300 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE300 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 P4KE300 reliable?
The price and inventory of P4KE300 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE300 is usually 5 days.
3.What payment methods are accepted for P4KE300?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE300 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE300?
P4KE300 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE300 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 P4KE300?
For technical support, including P4KE300 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE300 requirements.
6.How does Aetrix verify that P4KE300 is sourced from the original manufacturer or authorized distributors?
All P4KE300 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 P4KE300 meets industry standards.
7.What is the process for return or replacement of P4KE300?
All P4KE300 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE300, 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 P4KE300 part is unused and in its original packaging.
Return procedure for P4KE300:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4KE300 Tags
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