P4KE120C-B Equivalent & Substitute Parts

Part Overview

The P4KE120C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 102V reverse standoff voltage with a 173.25V maximum clamping voltage and 2.5A peak pulse current capability in a through-hole DO-204AL (DO-41) package. The part is currently listed as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

P4KE120C-B

Littelfuse Inc.In Stock: 1139P4KE120C-B Datasheet

Current PartRFQ

P4KE120CA

Taiwan Semiconductor CorporationIn Stock: 1179P4KE120CA Datasheet

DirectRFQ

P4KE120CA-B

Littelfuse Inc.In Stock: 1110P4KE120CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P4KE120C-B is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 102V
• Voltage - Breakdown (Min): minimum 108V
• Current - Peak Pulse (10/1000µs): 2.5A
• Power - Peak Pulse: 400W
• Package / Case: DO-204AL (DO-41)
• Mounting Type: Through Hole
• Type: Zener, Bidirectional (1 channel)
• Operating Temperature Range: -55°C to 175°C (TJ)

The identified substitute parts maintain these core electrical and mechanical specifications, ensuring functional compatibility in the original application circuit. Voltage clamping characteristics may vary within acceptable design margins while preserving the primary protection function.

Parameter Comparison

Engineering Selection Recommendations

Both P4KE120CA and P4KE120CA-B are qualified substitutes for the obsolete P4KE120C-B based on electrical parameter alignment and compliance certifications.

P4KE120CA-B (Littelfuse Inc., Active status) is the primary recommended substitute, maintaining manufacturer continuity with the original part while offering active product status and full availability. This part carries identical RoHS3 compliance and MSL rating.

P4KE120CA (Taiwan Semiconductor Corporation, Active status) serves as an alternative substitute with equivalent electrical specifications and compliance certifications. This option provides supply diversity and active manufacturing support.

Both substitutes demonstrate lower voltage clamping values (165V versus 173.25V), which represents improved transient suppression performance within the application's design margins. All three parts maintain identical reverse standoff voltage, peak pulse current, power dissipation, operating temperature range, and package configuration.

Frequently Asked Questions (FAQ)

Q: Can P4KE120CA and P4KE120CA-B be used interchangeably with P4KE120C-B?

A: Yes. Both substitute parts maintain the critical electrical parameters: 102V reverse standoff voltage, 2.5A peak pulse current, 400W peak pulse power, and identical DO-204AL through-hole package configuration. The lower clamping voltage (165V vs. 173.25V) represents enhanced protection performance.

Q: What is the primary difference between P4KE120CA and P4KE120CA-B?

A: The primary difference is manufacturer and packaging. P4KE120CA is manufactured by Taiwan Semiconductor Corporation and supplied in Tape & Reel format. P4KE120CA-B is manufactured by Littelfuse Inc. and supplied in Bulk packaging. Electrical specifications and compliance certifications are identical.

Q: Why is the original P4KE120C-B listed as obsolete?

A: Product obsolescence typically reflects end-of-life status from the manufacturer. The identified substitutes (P4KE120CA and P4KE120CA-B) are active products with ongoing manufacturing support and availability.

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

A: All three parts carry identical RoHS3 compliance and MSL 1 (Unlimited) ratings. Both substitutes maintain full regulatory alignment with the original component.

Q: Does the DO-204AL package remain the same across all three parts?

A: Yes. All three parts use the identical DO-204AL (DO-41) axial through-hole package, ensuring direct mechanical and electrical compatibility in PCB designs.

Q: What is the significance of the voltage clamping difference (173.25V vs. 165V)?

A: The lower clamping voltage in the substitute parts indicates faster transient suppression response, providing improved overvoltage protection performance. This represents a beneficial characteristic for the protected circuit.