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Taiwan Semiconductor Corporation P4KE350
- Part No.:
- P4KE350
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
P4KE350.pdf
- Description:
- 400W, 350V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,500
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Product details
Overview
P4KE350 from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal paths. It features a 350V nominal standoff voltage, 315–385V breakdown range at 1mA test current, 284V working peak reverse voltage, 0.83A maximum peak pulse current (10/1000μs), and clamps to ≤504V under surge conditions. It is used in industrial power supplies and automotive ECU input protection.
For engineers reviewing the P4KE350 datasheet, P4KE350 pinout, P4KE350 application, or P4KE350 equivalent, key selection criteria include its DO-204AL (DO-41) axial package, unidirectional polarity with cathode band marking, 400W peak pulse power rating, and compliance with AEC-Q101 when ordered with "H" suffix - critical for automotive-grade transient immunity design.
Technical Context
The P4KE350 operates as a silicon avalanche diode that enters controlled breakdown above its VBR threshold to shunt transient energy away from downstream circuitry. Its low dynamic impedance and sub-nanosecond response (<1.0ps from 0V to VBR) ensure effective suppression of fast-rising ESD and EFT events.
It is rated for 175°C maximum junction temperature and supports steady-state power dissipation of 1W at 75°C lead temperature. The device exhibits a VBR temperature coefficient of 0.110%/°C and reverse leakage <1μA at 284V, enabling stable operation across extended industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Voltage | 350V - defines approximate minimum clamping onset point for system-level overvoltage coordination |
| Breakdown Voltage VBR | 315–385V at 1mA - verified avalanche conduction range ensuring predictable turn-on under transients |
| Working Peak Reverse Voltage VWM | 284V - maximum continuous DC or RMS voltage the device blocks without significant leakage |
| Peak Pulse Power PPK | 400W at 10/1000μs waveform - quantifies single-event surge energy handling capability |
| Clamping Voltage VC | ≤504V at 0.83A IPPM - maximum voltage seen by protected circuit during worst-case 10/1000μs surge |
| Junction Temperature Range | −55°C to +175°C - enables deployment in under-hood automotive and high-ambient industrial environments |
| Package | DO-204AL (DO-41) - industry-standard axial-leaded package with tin-plated leads, UL 94V-0 molding |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, epoxy-molded case with cathode band marking for unidirectional polarity. Leads are pure tin-plated and solderable per J-STD-002; weight ≈0.300g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to circuit ground or lower-potential rail; forms return path during clamping |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 24V rail input); marked with band; conducts avalanche current to anode |
Key Features
| Feature | Design Value |
|---|---|
| 400W peak pulse power (10/1000μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4kV/2Ω) on 24–48V systems |
| Clamping voltage ≤504V at 0.83A | Provides margin below 600V system insulation limits while limiting stress on downstream MOSFETs or controllers |
| Response time <1.0ps (unidirectional) | Ensures suppression initiates before nanosecond-scale ESD transients propagate into IC inputs |
| AEC-Q101 qualified option (P4KE350H) | Validated for automotive powertrain and body electronics per stress-test requirements including temperature cycling and HTRB |
| Reverse leakage <1μA at 284V | Minimizes standby power loss in always-on circuits such as CAN bus termination or sensor bias rails |
Applications
| Industrial Power Input Protection | Automotive Body Control Module (BCM) Inputs |
|---|---|
|
Use Scenario: 24V DC input stage of programmable logic controller (PLC) exposed to load dump and inductive switching noise. IC Role / Device Role: Primary overvoltage clamp placed upstream of DC-DC converter and microcontroller power rails. Use Value: Limits transient excursions to ≤504V, preventing damage to 36V-rated input capacitors and 5V LDOs downstream. |
Use Scenario: LIN bus or switched 12V supply line in BCM subjected to battery reversal and jump-start surges. IC Role / Device Role: Unidirectional TVS on each protected input, referenced to chassis ground. Use Value: Withstands 40A surge current (per IEC 61000-4-5) while maintaining <1μA leakage at 13.5V nominal operation. |
| LED Driver Output Protection | Telecom DC Feeder Line Protection |
|
Use Scenario: Constant-current LED string driver output exposed to cable-induced transients during hot-plug or lightning-induced coupling. IC Role / Device Role: Output-side TVS placed across LED load terminals to absorb reverse-polarity and inductive kickback energy. Use Value: Clamps 10/1000μs surges to ≤504V, protecting high-voltage GaN FETs and current-sense amplifiers rated for 600V isolation. |
Use Scenario: −48V DC telecom feeder line entering remote radio unit (RRU), subject to induced surges from nearby lightning strikes. IC Role / Device Role: Series-connected unidirectional TVS on positive rail, grounded cathode configuration. Use Value: Provides 400W surge rating with 284V standoff, compatible with -48V nominal and ±10% regulation tolerance without 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 SMAJ350A | Same DO-214AC (SMA) package; 350V nominal; 315–385V VBR; 0.83A IPPM; 504V VC; 400W rating | Surface-mount instead of axial; requires PCB rework; better thermal performance in high-density layouts | Select for automated SMT assembly where board space is constrained and thermal management via copper pour is feasible |
| Vishay 1.5KE350A | Same DO-201AD (DO-27) package; identical electrical specs (350V, 315–385V VBR, 504V VC, 400W); higher 1.5W steady-state rating | Larger axial package (5.6mm diameter vs. DO-41's 2.7mm); higher mechanical robustness but less board-area efficient | Select when enhanced mechanical durability or higher continuous power derating (1.5W vs. 1W) is required in harsh vibration environments |
Compared with SMAJ350A and 1.5KE350A, the P4KE350 offers identical surge protection performance in a smaller DO-41 footprint ideal for through-hole prototyping and legacy industrial designs, while requiring no layout change for existing DO-204AL footprints.
Availability
P4KE350 is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, LED driver outputs, and telecom DC feeder lines requiring stable component supply and long-term obsolescence management.
Supply support for P4KE350 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 TVS diodes, rectifiers, and power MOSFETs since 1979.
The P4KE series is part of TSC's high-reliability transient suppression portfolio, engineered for automotive, industrial, and telecom applications demanding AEC-Q101 qualification, tight parametric tolerances, and consistent surge endurance.
FAQ
What is the maximum clamping voltage of the P4KE350 under standard 10/1000μs surge conditions?
The P4KE350 clamps to a maximum of 504V when subjected to its rated peak pulse current of 0.83A using the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events - a critical parameter for ensuring downstream components remain within their absolute maximum ratings.
Is the P4KE350 unidirectional or bidirectional, and how is polarity identified?
The P4KE350 is a unidirectional TVS diode, meaning it conducts only in reverse-bias avalanche mode. Polarity is indicated by a cathode band marked on the DO-204AL (DO-41) package body; the banded end connects to the higher-potential line being protected, while the unbanded end connects to ground or the lower-potential reference. Bidirectional variants use "CA" suffixes (e.g., P4KE350CA), which the P4KE350 does not carry.
What is the working peak reverse voltage (VWM) of the P4KE350, and why does it matter?
The P4KE350 has a working peak reverse voltage (VWM) of 284V - the maximum continuous DC or repetitive peak voltage it can block without exceeding 1μA leakage. This value ensures reliable operation in 240–277V AC-derived DC systems or 28V automotive systems with ripple, preventing false triggering while maintaining low standby current. Exceeding VWM risks premature conduction and thermal runaway.
Does the P4KE350 meet automotive qualification standards?
The base P4KE350 is not AEC-Q101 qualified; however, the variant P4KE350H (with "H" suffix) is fully AEC-Q101 qualified for automotive applications. This version undergoes accelerated stress testing including temperature cycling, high-temperature reverse bias, and humidity testing - making it suitable for engine control units, body electronics, and ADAS power domains where reliability under extreme conditions is mandatory.
How does the P4KE350 compare to the 1.5KE350A in terms of package and thermal performance?
The P4KE350 uses the smaller DO-204AL (DO-41) package (2.7mm diameter), while the 1.5KE350A uses the larger DO-201AD (DO-27) package (5.6mm diameter). Though both deliver identical 400W surge capability and 504V clamping, the 1.5KE350A offers higher steady-state power dissipation (1.5W vs. 1W) due to greater thermal mass - advantageous in high-ambient or high-duty-cycle applications where sustained leakage heating occurs.
P4KE350 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):
- 284V
- Voltage - Breakdown (Min):
- 315V
- Voltage - Clamping (Max) @ Ipp:
- 504V
- Current - Peak Pulse (10/1000µs):
- 830mA
- 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)
P4KE350 FAQ
1.How can I place an order for P4KE350 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4KE350 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 P4KE350 reliable?
The price and inventory of P4KE350 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE350 is usually 5 days.
3.What payment methods are accepted for P4KE350?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE350 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4KE350?
P4KE350 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4KE350 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 P4KE350?
For technical support, including P4KE350 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE350 requirements.
6.How does Aetrix verify that P4KE350 is sourced from the original manufacturer or authorized distributors?
All P4KE350 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 P4KE350 meets industry standards.
7.What is the process for return or replacement of P4KE350?
All P4KE350 units undergo pre-shipment inspection (PSI). If there is an issue with P4KE350, 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 P4KE350 part is unused and in its original packaging.
Return procedure for P4KE350:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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