P4KE30-B Equivalent & Substitute Parts

Part Overview

The P4KE30-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 25.6V reverse standoff voltage with a 43.47V maximum clamping voltage and 9.9A peak pulse current capability in a through-hole DO-204AL (DO-41) package. The product is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and component procurement.

Substiute Parts

P4KE30-B

Littelfuse Inc.In Stock: 1046P4KE30-B Datasheet

Current PartRFQ

P4KE30A

Taiwan Semiconductor CorporationIn Stock: 24245P4KE30A Datasheet

DirectRFQ

P4KE30A-B

LittelfuseIn Stock: 845P4KE30A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P4KE30-B is determined by the following critical parameters:

• Reverse standoff voltage: 25.6V (identical across all candidates)
• Clamping voltage maximum: 43.47V or lower (ensures protection threshold compatibility)
• Peak pulse current: 9.9A or higher (maintains or exceeds surge handling capability)
• Peak pulse power: 400W (standard for this series)
• Package type: DO-204AL / DO-41 through-hole axial configuration
• Operating temperature range: -55°C ~ 175°C minimum
• Series designation: P4KE (ensures design compatibility)

The substitute parts P4KE30A and P4KE30A-B meet these criteria with equivalent standoff voltage, compatible clamping characteristics, and identical thermal and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

Both P4KE30A and P4KE30A-B are functionally equivalent substitutes for the obsolete P4KE30-B. Selection between them should be based on the following factors:

P4KE30A (Taiwan Semiconductor Corporation) offers superior availability with 24,200 units in stock and is supplied in Tape & Reel packaging, suitable for automated assembly processes. This part maintains ROHS3 compliance and REACH unaffected status.

P4KE30A-B (Littelfuse) provides continuity with the original manufacturer and is available in Bulk packaging with 828 units in stock. This option maintains ROHS3 compliance and REACH unaffected status, offering a direct manufacturer alternative from the original supplier.

Both substitutes feature lower maximum clamping voltage (41.4V versus 43.47V), which provides improved protection margins. All three parts share identical reverse standoff voltage, thermal operating range, and mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can P4KE30A or P4KE30A-B be used as direct replacements for P4KE30-B?

A: Yes. Both substitute parts maintain the critical 25.6V reverse standoff voltage and identical thermal and mechanical specifications. The lower clamping voltage (41.4V) of the substitutes provides enhanced protection performance compared to the original 43.47V specification.

Q: What is the difference between P4KE30A and P4KE30A-B?

A: The primary differences are manufacturer (Taiwan Semiconductor Corporation versus Littelfuse), packaging format (Tape & Reel versus Bulk), and inventory availability. Electrical and thermal specifications are equivalent.

Q: Are there any compatibility concerns with the DO-204AL package?

A: No. All three parts use identical DO-204AL (DO-41) axial through-hole packaging, ensuring mechanical and electrical compatibility with existing PCB designs and footprints.

Q: Do the substitute parts meet the same compliance standards?

A: Yes. Both P4KE30A and P4KE30A-B are ROHS3 compliant with REACH unaffected status, matching the compliance profile of the original P4KE30-B.

Q: What is the significance of the lower clamping voltage in the substitutes?

A: The 41.4V maximum clamping voltage of P4KE30A and P4KE30A-B is lower than the original 43.47V specification. This represents improved clamping performance, providing faster voltage suppression and better transient protection characteristics within the same 25.6V standoff voltage class.