P4KE120-B Equivalent & Substitute Parts

Part Overview

The P4KE120-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 102V reverse standoff voltage and 173.25V maximum clamping voltage with 2.5A peak pulse current capability in a through-hole DO-204AL (DO-41) package format.

The P4KE120-B is classified as obsolete. Equivalent and substitute parts are available from active product lines that maintain identical or compatible electrical and mechanical specifications, enabling direct replacement in existing designs without circuit modification.

Substiute Parts

P4KE120-B

Littelfuse Inc.In Stock: 1149P4KE120-B Datasheet

Current PartRFQ

P4KE120A

Taiwan Semiconductor CorporationIn Stock: 1164P4KE120A Datasheet

DirectRFQ

P4KE120A-B

Littelfuse Inc.In Stock: 1094P4KE120A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P4KE120-B is determined by the following critical parameters:

• Reverse standoff voltage: 102V (must match)
• Unidirectional channel configuration: 1 channel (must match)
• Package format: DO-204AL (DO-41) through-hole axial (must match)
• Peak pulse current: 2.5A (must match)
• Power dissipation: 400W peak pulse (must match)
• Operating temperature range: -55°C to 175°C (must match)
• Series classification: P4KE (must match)
• RoHS compliance: ROHS3 (must match)

The substitute parts P4KE120A and P4KE120A-B maintain identical standoff voltage, channel configuration, package format, current rating, power rating, temperature range, and RoHS compliance. Variations in clamping voltage (165V vs. 173.25V) and breakdown voltage minimum values represent acceptable parameter ranges within the P4KE120 series specification envelope and do not preclude functional substitution.

Parameter Comparison

Engineering Selection Recommendations

Both P4KE120A and P4KE120A-B are active product variants suitable for replacing the obsolete P4KE120-B in new designs and production environments.

P4KE120A-B (Littelfuse Inc., Bulk packaging) maintains original manufacturer continuity and is recommended for direct replacement in existing supply chains and assembly processes where bulk component handling is standard practice.

P4KE120A (Taiwan Semiconductor Corporation, Tape & Reel packaging) provides an alternative source with active product status and is suitable for automated assembly environments utilizing tape-and-reel component feeding systems.

Both substitutes maintain ROHS3 compliance and identical electrical performance within the P4KE120 series specification range. Selection between these options is determined by packaging requirements, supply chain preferences, and assembly process compatibility rather than electrical performance differences.

Frequently Asked Questions (FAQ)

Q: Can P4KE120A and P4KE120A-B be used interchangeably with P4KE120-B?

A: Yes. Both substitute parts maintain identical reverse standoff voltage (102V), peak pulse current (2.5A), power dissipation (400W), operating temperature range (-55°C to 175°C), and package format (DO-204AL through-hole axial). These are the critical parameters determining functional equivalence in TVS diode applications.

Q: What is the difference between the clamping voltages listed for each part?

A: The P4KE120-B specifies 173.25V maximum clamping voltage, while P4KE120A and P4KE120A-B specify 165V maximum clamping voltage. Both values fall within acceptable operating ranges for the P4KE120 series and do not affect substitution eligibility. The lower clamping voltage of the substitute parts represents improved transient suppression performance.

Q: Are there packaging differences between the substitute parts?

A: P4KE120A is supplied in Tape & Reel (TR) format, suitable for automated pick-and-place assembly. P4KE120A-B is supplied in Bulk format, suitable for manual assembly or conventional component handling. Both use identical DO-204AL (DO-41) package geometry and are mechanically interchangeable.

Q: Why is P4KE120-B classified as obsolete?

A: Product obsolescence reflects manufacturer discontinuation decisions. Active substitute parts P4KE120A and P4KE120A-B provide equivalent electrical and mechanical functionality, enabling continued design support and production continuity.

Q: Do the substitute parts maintain RoHS compliance?

A: Yes. Both P4KE120A and P4KE120A-B are ROHS3 compliant, matching the compliance status of the original P4KE120-B component.