P4KE100C-B Equivalent & Substitute Parts

Part Overview

The P4KE100C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage protection applications. This component features a 85.5V reverse standoff voltage with 143.85V maximum clamping voltage and 3A peak pulse current capability in a through-hole DO-204AL (DO-41) package. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

P4KE100C-B

Littelfuse Inc.In Stock: 724P4KE100C-B Datasheet

Current PartRFQ

P4KE100CA

Taiwan Semiconductor CorporationIn Stock: 15357P4KE100CA Datasheet

DirectRFQ

P4KE100CA-B

Littelfuse Inc.In Stock: 1146P4KE100CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE100C-B are qualified based on the following critical parameters that determine functional equivalence:

• Reverse standoff voltage: 85.5V (Typ)
• Peak pulse current: 3A
• Peak pulse power: 400W
• Operating temperature range: -55°C to 175°C
• Package type: DO-204AL (DO-41) through-hole axial
• Series classification: P4KE base product number
• Bidirectional channels: 1
• Type: Zener TVS diode

The substitute parts P4KE100CA and P4KE100CA-B meet these core electrical and mechanical requirements. Both maintain identical reverse standoff voltage, peak pulse current, power rating, temperature range, and package configuration. Variations in clamping voltage (137V vs. 143.85V) remain within acceptable tolerance for general-purpose transient suppression applications where the specified parameters are met.

Parameter Comparison

Engineering Selection Recommendations

Both P4KE100CA and P4KE100CA-B are active production parts suitable for replacing the obsolete P4KE100C-B. Selection between the two substitutes depends on procurement and assembly requirements:

P4KE100CA (Taiwan Semiconductor Corporation) is available in Tape & Reel packaging with 15,300 units in stock, suitable for automated assembly processes and high-volume production runs.

P4KE100CA-B (Littelfuse Inc.) is available in bulk packaging with 1,052 units in stock, suitable for manual assembly or lower-volume applications. This option maintains the original manufacturer source.

Both parts maintain ROHS3 compliance, identical electrical performance within specified parameters, and equivalent thermal operating ranges. The clamping voltage difference (137V vs. 143.85V) does not affect functional substitution for general-purpose transient suppression where the specified 85.5V standoff and 3A peak current parameters are the primary design constraints.

Frequently Asked Questions (FAQ)

Q: Can P4KE100CA and P4KE100CA-B be used interchangeably with P4KE100C-B?

A: Yes. Both substitute parts maintain the critical electrical parameters: 85.5V reverse standoff voltage, 3A peak pulse current, 400W peak pulse power, and identical operating temperature range. The DO-204AL (DO-41) through-hole package is mechanically identical, allowing direct board-level substitution.

Q: What is the significance of the clamping voltage difference (143.85V vs. 137V)?

A: The clamping voltage represents the maximum voltage across the TVS diode during transient suppression. Both values fall within acceptable tolerance for general-purpose applications. Circuit design margins should account for this 6.85V difference if the original design operated near the maximum clamping specification.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) and bulk packaging formats contain identical components. The packaging difference affects only procurement, storage, and assembly processes. Electrical and thermal characteristics remain unchanged.

Q: Are there compliance or certification differences between the substitutes?

A: No. All three parts are ROHS3 compliant, carry identical ECCN (EAR99) and HTSUS classifications, and maintain MSL 1 (Unlimited) moisture sensitivity ratings. Compliance status is equivalent across all options.

Q: Why is the original P4KE100C-B classified as obsolete?

A: Obsolescence indicates the part is no longer in active production. The substitute parts P4KE100CA and P4KE100CA-B provide equivalent functionality with active production status, ensuring long-term availability and supply chain continuity.