P4KE440C-B Equivalent & Substitute Parts

Part Overview

The P4KE440C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 376V reverse standoff voltage with 632.1V maximum clamping voltage and 680mA peak pulse current capability in a through-hole DO-204AL (DO-41) package format.

The P4KE440C-B currently holds obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this TVS diode specification.

Substiute Parts

P4KE440C-B

Littelfuse Inc.In Stock: 1039P4KE440C-B Datasheet

Current PartRFQ

P4KE440CA

Taiwan Semiconductor CorporationIn Stock: 690P4KE440CA Datasheet

DirectRFQ

P4KE440CA-B

Littelfuse Inc.In Stock: 996P4KE440CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P4KE440C-B is determined by the following critical parameters:

• Reverse Standoff Voltage: 376V (Typ)
• Breakdown Voltage (Min): 396V or higher
• Clamping Voltage (Max) @ Ipp: Within acceptable operating range
• Peak Pulse Current: 680mA or higher
• Peak Pulse Power: 400W or higher
• Package / Case: DO-204AL, DO-41, Axial (through-hole configuration)
• Operating Temperature Range: -55°C to 175°C (TJ)
• Bidirectional Channels: 1
• Type: Zener

The identified substitute parts maintain compatibility across these core electrical and mechanical parameters, ensuring functional equivalence within the P4KE series TVS diode family.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts maintain active product status, ensuring long-term availability and supply chain stability compared to the obsolete P4KE440C-B.

P4KE440CA (Taiwan Semiconductor Corporation) and P4KE440CA-B (Littelfuse Inc.) are functionally equivalent alternatives. Both parts comply with ROHS3 requirements and maintain identical operating temperature specifications. The clamping voltage differential between the main part (632.1V) and substitutes (600V and 602V respectively) remains within the P4KE series design envelope. Peak pulse current ratings meet or exceed the original specification (690mA and 680mA versus 680mA).

Selection between substitute options should prioritize active product status and supply availability. P4KE440CA-B maintains manufacturer continuity with Littelfuse Inc., the original manufacturer of the P4KE440C-B, while P4KE440CA provides an alternative source from Taiwan Semiconductor Corporation.

Frequently Asked Questions (FAQ)

Q: Can P4KE440CA and P4KE440CA-B be used interchangeably with P4KE440C-B?

A: Yes. Both substitute parts maintain the critical electrical parameters: 376V reverse standoff voltage, equivalent breakdown voltage specifications, compatible clamping voltage performance, and identical peak pulse power rating. Package configuration (DO-204AL through-hole) and operating temperature range (-55°C to 175°C) are identical across all three parts.

Q: What is the primary difference between the two substitute parts?

A: P4KE440CA is manufactured by Taiwan Semiconductor Corporation, while P4KE440CA-B is manufactured by Littelfuse Inc. Both maintain active product status. The clamping voltage specifications differ slightly (600V versus 602V), but both values fall within acceptable operating parameters for the P4KE series.

Q: Why is the P4KE440C-B listed as obsolete?

A: Obsolete status indicates the part is no longer in active production. The substitute parts P4KE440CA and P4KE440CA-B represent current production alternatives within the same P4KE series, offering equivalent electrical performance and mechanical compatibility.

Q: Are there any compliance or certification differences between the main part and substitutes?

A: All three parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating. Both substitute parts include REACH Unaffected status documentation, providing additional regulatory assurance for international applications.

Q: What packaging options are available for the substitute parts?

A: P4KE440CA is supplied in Tape & Reel (TR) format, while P4KE440CA-B is supplied in Bulk packaging. Both maintain the same DO-204AL (DO-41) axial through-hole package configuration, ensuring mechanical compatibility with existing PCB designs.