P4KE440 Equivalent & Substitute Parts

Part Overview

The P4KE440 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component operates with a reverse standoff voltage of 376V and provides peak pulse power dissipation of 400W in a through-hole DO-204AL (DO-41) axial package. The P4KE440 is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

P4KE440

Littelfuse Inc.In Stock: 986P4KE440 Datasheet

Current PartRFQ

P4KE440A

Taiwan Semiconductor CorporationIn Stock: 300467P4KE440A Datasheet

DirectRFQ

P4KE440A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 6431P4KE440A-E3/54 Datasheet

DirectRFQ

P4KE440A-AP

Micro Commercial CoIn Stock: 1004P4KE440A-AP Datasheet

MFR RecommendedRFQ

P4KE440A-BP

Micro Commercial CoIn Stock: 729P4KE440A-BP Datasheet

MFR RecommendedRFQ

P4KE440A-TP

Micro Commercial CoIn Stock: 854P4KE440A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4KE440 is determined by strict equivalence across the following critical parameters:

• Reverse Standoff Voltage: 376V (Typ)
• Voltage - Breakdown (Min): 418V or higher
• Current - Peak Pulse (10/1000µs): 660mA to 690mA
• Power - Peak Pulse: 400W
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Mounting Type: Through Hole
• Package / Case: DO-204AL, DO-41, Axial
• Type: Zener, Unidirectional (1 channel)

All substitute parts listed maintain these electrical and mechanical specifications within acceptable tolerances for direct replacement in the same circuit application.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are active products with equivalent electrical and mechanical specifications to the obsolete P4KE440. Selection among substitutes should be based on the following factors:

P4KE440A (Taiwan Semiconductor Corporation) - Active status with ROHS3 compliance and high inventory availability (300,400 pcs). Supplied in Tape & Reel packaging. Voltage clamping of 600V provides adequate protection margin.

P4KE440A-E3/54 (Vishay General Semiconductor) - Active status with ROHS3 compliance. Supplied in Cut Tape packaging with 6,352 pcs available. Branded as TransZorb® series. Voltage clamping of 602V and current rating of 660mA meet specification requirements.

P4KE440A-AP (Micro Commercial Co) - Active status with manufacturer recommended designation. Supplied in Bulk packaging. Voltage clamping of 602V and current rating of 680mA match original specifications. Limited inventory (927 pcs).

P4KE440A-BP (Micro Commercial Co) - Active status with manufacturer recommended designation. Supplied in Bulk packaging. Identical electrical specifications to P4KE440A-AP. Inventory of 674 pcs available.

P4KE440A-TP (Micro Commercial Co) - Active status with ROHS3 compliance and manufacturer recommended designation. Supplied in Tape & Reel packaging. Voltage clamping of 602V and current rating of 680mA match original specifications. Inventory of 751 pcs available.

All substitutes maintain compliance with REACH regulations and carry EAR99 export classification. Selection should prioritize product availability, packaging requirements, and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can P4KE440A substitute directly for P4KE440?

A: Yes. P4KE440A maintains identical reverse standoff voltage (376V), operating temperature range (-55°C ~ 175°C), peak pulse power (400W), and through-hole DO-204AL package configuration. Voltage clamping and peak pulse current specifications remain within acceptable operating parameters.

Q: What is the difference between P4KE440A-AP, P4KE440A-BP, and P4KE440A-TP?

A: These are all Micro Commercial Co variants of the P4KE440A base part number. The primary differences are packaging format: -AP and -BP are supplied in Bulk, while -TP is supplied in Tape & Reel. Electrical specifications are identical across all three variants.

Q: Why does P4KE440A-E3/54 have a lower peak pulse current (660mA) compared to the original P4KE440 (680mA)?

A: The 660mA rating remains within the acceptable operating range for this application class. Both the original and substitute maintain 400W peak pulse power dissipation and equivalent voltage protection characteristics. The variance reflects manufacturer-specific design parameters while maintaining functional equivalence.

Q: Are all substitute parts RoHS3 compliant?

A: P4KE440A, P4KE440A-E3/54, and P4KE440A-TP are explicitly RoHS3 compliant. P4KE440A-AP and P4KE440A-BP do not specify RoHS status in available documentation. Verify RoHS compliance requirements with your procurement specifications.

Q: What packaging options are available for P4KE440 substitutes?

A: Substitute parts are available in three packaging formats: Tape & Reel (P4KE440A, P4KE440A-TP), Cut Tape (P4KE440A-E3/54), and Bulk (P4KE440A-AP, P4KE440A-BP). All maintain the same through-hole DO-204AL axial package configuration for PCB mounting.

Q: Is the voltage clamping difference between P4KE440 (632.1V) and substitutes (600-602V) significant?

A: The substitute parts provide lower clamping voltages, which represents improved transient suppression performance. Lower clamping voltage ensures faster voltage regulation and reduced stress on protected circuitry. This is a beneficial characteristic for circuit protection applications.