P4KE15-B Equivalent & Substitute Parts

Part Overview

The P4KE15-B is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This component features a 12.8V reverse standoff voltage with a 22.26V maximum clamping voltage and 19.3A peak pulse current capability in a through-hole DO-204AL (DO-41) axial package. The part is currently classified as obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

P4KE15-B

LittelfuseIn Stock: 861P4KE15-B Datasheet

Current PartRFQ

P4KE15A

Taiwan Semiconductor CorporationIn Stock: 300472P4KE15A Datasheet

DirectRFQ

P4KE15A-B

LittelfuseIn Stock: 1826P4KE15A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P4KE15-B is determined by the following critical parameters:

• Reverse standoff voltage: 12.8V (must match)
• Package type: DO-204AL / DO-41 axial through-hole (must match)
• Unidirectional configuration: 1 channel (must match)
• Clamping voltage: 22.26V maximum (substitute must not exceed this value)
• Peak pulse current: 19.3A minimum (substitute must meet or exceed)
• Power dissipation: 400W (substitute must meet or exceed)
• Operating temperature range: -55°C to 175°C (must match or exceed)

The identified substitute parts P4KE15A and P4KE15A-B meet these substitution criteria while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

Both P4KE15A and P4KE15A-B are qualified substitutes for the obsolete P4KE15-B based on electrical parameter compatibility and regulatory compliance.

P4KE15A-B (Littelfuse) maintains manufacturer continuity with the original part and carries active product status with 1803 units in stock. This option provides the most direct replacement path for existing designs.

P4KE15A (Taiwan Semiconductor Corporation) offers an alternative source with higher peak pulse current capability (20A versus 19.3A) and superior clamping voltage performance (21.2V versus 22.26V), along with significantly higher inventory availability (300,400 units). Both substitute parts maintain identical operating temperature ranges, RoHS3 compliance, and MSL ratings.

Frequently Asked Questions (FAQ)

Q: Can P4KE15A and P4KE15A-B be used interchangeably with P4KE15-B?

A: Both parts meet the core substitution criteria: identical reverse standoff voltage (12.8V), matching package type (DO-204AL axial through-hole), and equivalent power dissipation (400W). The substitute parts feature lower maximum clamping voltages (21.2V versus 22.26V) and meet or exceed peak pulse current requirements, making them functionally compatible for general-purpose transient voltage suppression applications.

Q: What is the difference between P4KE15A and P4KE15A-B?

A: Both parts share identical electrical specifications and package configuration. The primary differences are manufacturer (Taiwan Semiconductor Corporation versus Littelfuse), packaging format (Tape & Reel versus Bulk), and inventory availability. P4KE15A-B maintains the original Littelfuse manufacturer relationship, while P4KE15A provides an alternative source option.

Q: Are there any compliance or certification differences between these parts?

A: All three parts (P4KE15-B, P4KE15A, and P4KE15A-B) are ROHS3 compliant with MSL rating of 1 (Unlimited). Both substitute parts carry REACH Unaffected status. No compliance barriers exist for substitution.

Q: Does the package type remain the same across all three parts?

A: Yes. All parts use the DO-204AL (DO-41) axial through-hole package, ensuring direct mechanical and electrical compatibility on existing printed circuit boards without layout modifications.