Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Taiwan Semiconductor Corporation P4KE440A

Name: P4KE440A
Brand: Taiwan Semiconductor Corporation
SKU: P4KE440A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: P4KE440A

Manufacturer:: Taiwan Semiconductor Corporation

Category:: TVS Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: P4KE440A.pdf

Description:: TVS DIODE 376VWM 600VC DO204AL

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,562

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

P4KE440A from Taiwan Semiconductor is a unidirectional 400W transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 440V, working stand-off voltage of 376V, clamping voltage of 600V at 0.69A peak pulse current, and DO-204AL (DO-41) axial package - designed for high-voltage surge protection in power supply input stages and industrial AC line interfaces.

For engineers reviewing the P4KE440A datasheet, P4KE440A pinout, P4KE440A application, or P4KE440A equivalent, key selection criteria include its 400W 10/1000μs surge rating, low 1μA reverse leakage at 376V, fast sub-nanosecond response to transients, AEC-Q101 qualification option (P4KE440AH), and compatibility with UL 94V-0 molded compound and JESD201 Class 2 whisker-resistant tin plating.

Technical Context

The P4KE440A operates as a unidirectional avalanche diode, clamping overvoltage transients by entering breakdown when reverse voltage exceeds its 418–462V V_BR range at 1mA test current. Its 600V clamping voltage at 0.69A ensures robust protection for downstream circuitry during 400W surges per the 10/1000μs waveform standard.

Thermal performance is defined by a 175°C maximum junction temperature, 1W steady-state power dissipation at 75°C lead temperature, and derating above 25°C ambient per Fig.2. Polarity is marked by a cathode band, and it complies with ANSI/IEEE C62.35 for transient suppression metrics.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BR (min/max)	418V / 462V at 1mA - defines precise avalanche onset window for reliable triggering without premature conduction
V_WM	376V - maximum continuous reverse operating voltage before leakage exceeds 1μA
V_C @ I_PPM	600V at 0.69A - clamped voltage during full 400W surge, limiting stress on protected ICs or MOSFETs
P_PK	400W - peak pulse power handling per 10/1000μs waveform, enabling compliance with IEC 61000-4-5 Level 4
I_R @ V_WM	<1μA - ultra-low leakage preserves efficiency in high-impedance bias networks and standby circuits
T_J max	175°C - supports operation in harsh environments including industrial motor drives and outdoor power converters
Package	DO-204AL (DO-41) - industry-standard axial leaded package with 0.300g mass and UL 94V-0 flammability rating

Pinout & Package

DO-204AL (DO-41) axial-leaded package with cathode band marking polarity. Leads are pure tin-plated, solderable per J-STD-002 and compliant with JESD201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current path / low-side reference	Connected to ground or low-voltage rail in unidirectional clamp configuration
Cathode	Transient voltage input / high-side connection	Connected to protected line (e.g., AC input, DC bus); marked with band for orientation

Key Features

Feature	Design Value
400W surge capability	Enables single-device protection against severe lightning-induced surges per IEC 61000-4-5
<1.0ps response time (unidirectional)	Clamps transients before sensitive gate oxides or logic inputs experience overstress
AEC-Q101 qualified variant available	Supports automotive under-hood applications requiring validated reliability and thermal cycling endurance
UL Recognized (E-326243)	Validates safety compliance for end-equipment certification in North American markets
Halogen-free & RoHS compliant	Meets environmental regulations including IEC 61249-2-21 for printed circuit board assembly

Applications

AC Power Input Protection	Industrial Motor Drive DC Bus
Use Scenario: 480VAC industrial mains feed into rectifier and bulk capacitor stage. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus after bridge rectifier to clamp switching spikes and lightning surges. Use Value: Limits transient voltage to ≤600V, preventing overvoltage failure of 600V-rated IGBTs or electrolytic capacitors.	Use Scenario: Regenerative braking induces high-voltage spikes on DC link of 3-phase inverter. IC Role / Device Role / Timing Role: P4KE440A absorbs energy from inductive kickback during rapid IGBT turn-off. Use Value: 400W rating handles repetitive 10/1000μs pulses without degradation, extending system uptime.
Telecom Line Interface	Renewable Energy Inverter Input
Use Scenario: Outdoor telecom cabinet exposed to induced surges on 24–48V DC distribution lines. IC Role / Device Role / Timing Role: Clamps EFT and surge events on power feed lines upstream of DC-DC converters. Use Value: 376V V_WM allows safe operation at 48V nominal with margin, while 600V V_C protects downstream PMICs.	Use Scenario: Solar PV string input to grid-tie inverter experiences voltage overshoot during cloud-edge transients. IC Role / Device Role / Timing Role: Mounted across MPPT input terminals to suppress >1kV transients coupled from long cable runs. Use Value: 440V nominal rating matches typical 600–1000V DC string voltages, ensuring coordination with system overvoltage thresholds.

AC Power Input Protection

Industrial Motor Drive DC Bus

Use Scenario: 480VAC industrial mains feed into rectifier and bulk capacitor stage.

IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus after bridge rectifier to clamp switching spikes and lightning surges.

Use Value: Limits transient voltage to ≤600V, preventing overvoltage failure of 600V-rated IGBTs or electrolytic capacitors.

Use Scenario: Regenerative braking induces high-voltage spikes on DC link of 3-phase inverter.

IC Role / Device Role / Timing Role: P4KE440A absorbs energy from inductive kickback during rapid IGBT turn-off.

Use Value: 400W rating handles repetitive 10/1000μs pulses without degradation, extending system uptime.

Telecom Line Interface

Renewable Energy Inverter Input

Use Scenario: Outdoor telecom cabinet exposed to induced surges on 24–48V DC distribution lines.

IC Role / Device Role / Timing Role: Clamps EFT and surge events on power feed lines upstream of DC-DC converters.

Use Value: 376V V_WM allows safe operation at 48V nominal with margin, while 600V V_C protects downstream PMICs.

Use Scenario: Solar PV string input to grid-tie inverter experiences voltage overshoot during cloud-edge transients.

IC Role / Device Role / Timing Role: Mounted across MPPT input terminals to suppress >1kV transients coupled from long cable runs.

Use Value: 440V nominal rating matches typical 600–1000V DC string voltages, ensuring coordination with system overvoltage thresholds.

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 P4KE440A	Identical electrical specs, same DO-41 package, UL E326243 certified, but manufactured in different fab with distinct traceability	No functional difference; accepted in same designs where dual-sourcing is required	Select when cross-qualified BOM flexibility or regional supply chain redundancy is needed
ON Semiconductor 1.5KE440A	Same 440V nominal, 600V clamping, but rated for 1500W peak power and larger DO-201AE package	Higher surge capacity suits infrequent extreme events; requires PCB layout change due to larger footprint	Choose only if design must withstand >1000W surges - not a drop-in replacement for P4KE440A

Compared with Littelfuse P4KE440A, Taiwan Semiconductor's version offers identical performance in same footprint; versus 1.5KE440A, it trades higher surge rating and larger package for cost and space efficiency in standard 400W applications.

Availability

P4KE440A is available at Aetrix Electronics and suitable for AC power input protection, industrial motor drive DC bus clamping, telecom line interface hardening, and renewable energy inverter input surge suppression requiring stable component supply across production lifecycles.

Supply support for P4KE440A 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for industrial, computing, and consumer applications.

The P4KE series was developed for cost-effective, high-reliability transient suppression in high-voltage power systems - emphasizing tight V_BR tolerance, low leakage, and AEC-Q101 qualification readiness.

FAQ

What is the breakdown voltage range of the P4KE440A?

The P4KE440A has a guaranteed breakdown voltage (V_BR) range of 418V to 462V at 1mA test current, measured per ANSI/IEEE C62.35. This 10% tolerance ensures predictable clamping behavior in high-voltage surge protection circuits without premature conduction under normal operating conditions. The P4KE440A maintains this specification across its full operating temperature range.

Is the P4KE440A suitable for bidirectional transient suppression?

No - the P4KE440A is a unidirectional TVS diode, intended for use with clearly defined polarity such as DC bus or rectified AC lines. For bidirectional protection, the P4KE440CA variant must be selected. The P4KE440A features a cathode band marking and conducts only in reverse breakdown; forward conduction is limited to 3.5V at 25A, making it unsuitable for AC-coupled or symmetrical surge scenarios.

What is the maximum clamping voltage of the P4KE440A during a 400W surge?

The P4KE440A clamps to a maximum of 600V when subjected to its rated 400W peak pulse power at the standard 10/1000μs waveform. This value corresponds to a peak pulse current of 0.69A and is measured under controlled lab conditions per IEC 61000-4-5. The P4KE440A's low dynamic impedance ensures consistent clamping performance across multiple surge events within its thermal limits.

Does the P4KE440A meet automotive qualification standards?

The base P4KE440A is not AEC-Q101 qualified; however, the P4KE440AH variant - identical in all electrical and mechanical specifications except for extended reliability testing - is fully AEC-Q101 qualified. Engineers specifying the P4KE440A for automotive applications must select the "H" suffix version and verify qualification status via Taiwan Semiconductor's official documentation. The P4KE440A itself is rated for industrial and commercial use only.

What packaging options are available for the P4KE440A?

The P4KE440A is supplied in DO-204AL (DO-41) axial package with two packing options: 5,000 units per tape-and-reel (standard P4KE440A) and 3,000 units per ammo box (P4KE440A0G). Both variants use pure tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. No surface-mount or alternate lead-form options exist for the P4KE440A.

P4KE440A 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):: 376V

Voltage - Breakdown (Min):: 418V

Voltage - Clamping (Max) @ Ipp:: 600V

Current - Peak Pulse (10/1000µs):: 690mA

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)

P4KE440A FAQ

1.How can I place an order for P4KE440A through Aetrix?

Please submit a Request for Quotation (RFQ) for P4KE440A 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 P4KE440A reliable?

The price and inventory of P4KE440A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4KE440A is usually 5 days.

3.What payment methods are accepted for P4KE440A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4KE440A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for P4KE440A?

P4KE440A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your P4KE440A 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 P4KE440A?

For technical support, including P4KE440A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4KE440A requirements.

6.How does Aetrix verify that P4KE440A is sourced from the original manufacturer or authorized distributors?

All P4KE440A 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 P4KE440A meets industry standards.

7.What is the process for return or replacement of P4KE440A?

All P4KE440A units undergo pre-shipment inspection (PSI). If there is an issue with P4KE440A, 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 P4KE440A part is unused and in its original packaging.

Return procedure for P4KE440A:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…