Equivalent & Substitute Parts for 5KP14 Transient Voltage Suppressor

Part Overview

The 5KP14 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 14V reverse standoff voltage rating and 5000W peak pulse power handling capability in a through-hole P600 axial package. The 5KP14 is classified as obsolete, necessitating identification of active substitute components that maintain electrical and mechanical compatibility for new designs and production continuity.

Substiute Parts

5KP14

Littelfuse Inc.In Stock: 9265KP14 Datasheet

Current PartRFQ

5KP14A

Littelfuse Inc.In Stock: 41375KP14A Datasheet

DirectRFQ

SLD14U-017-B

Littelfuse Inc.In Stock: 805SLD14U-017-B Datasheet

MFR RecommendedRFQ

5KP14E3/TR13

Microchip TechnologyIn Stock: 6935KP14E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP14 is determined by the following critical parameters:

• Voltage Rating: Reverse standoff voltage must be 14V (±tolerance acceptable within standard TVS specifications)
• Package Type: P600 axial through-hole package required for mechanical and thermal compatibility
• Power Rating: 5000W peak pulse power handling capability
• Operating Temperature: -55°C to 175°C junction temperature range
• Compliance: ROHS3 compliance and moisture sensitivity level (MSL) 1 required

Substitute parts must maintain these core electrical and mechanical specifications to ensure drop-in compatibility in existing circuit designs. Variations in clamping voltage and peak pulse current are acceptable within the defined parameter ranges, as these represent performance characteristics within the same functional class.

Parameter Comparison

Engineering Selection Recommendations

5KP14A (Littelfuse Inc., Active Status): This part is the direct active equivalent from the original manufacturer. It maintains identical voltage ratings, power handling, and package specifications. The lower clamping voltage (23.2V vs. 24.36V) represents improved performance characteristics within acceptable TVS diode tolerances. This part is recommended as the primary substitute for new designs and production continuity.

SLD14U-017-B (Littelfuse Inc., Active Status, AEC-Q101 Qualified): This automotive-grade variant meets the same electrical specifications as 5KP14A with additional AEC-Q101 qualification. Selection of this part is appropriate for applications requiring automotive-grade components or enhanced reliability documentation. Bulk packaging may require adjustment to procurement workflows.

5KP14E3/TR13 (Microchip Technology, Active Status): This cross-manufacturer substitute maintains the 14V voltage class and 5000W power rating with slightly elevated clamping voltage (25.8V). It is suitable for applications where multi-source component availability is required or where Microchip Technology supply chain integration is preferred. Tape & Reel packaging supports automated assembly processes.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and the required operating temperature range, ensuring regulatory and environmental compatibility with the original 5KP14 specification.

Frequently Asked Questions (FAQ)

Q: Can 5KP14A be used as a direct replacement for 5KP14?

A: Yes. The 5KP14A maintains identical reverse standoff voltage (14V), power rating (5000W), operating temperature range (-55°C to 175°C), and P600 axial package configuration. The clamping voltage difference (23.2V vs. 24.36V) is within acceptable TVS diode performance variation and represents improved protection characteristics.

Q: What is the difference between 5KP14A and SLD14U-017-B?

A: Both parts share identical electrical specifications (14V standoff, 23.2V clamping, 5000W power). SLD14U-017-B carries AEC-Q101 automotive qualification and is supplied in bulk packaging, whereas 5KP14A is supplied in cut tape. Selection depends on application requirements and procurement format preferences.

Q: Why does 5KP14E3/TR13 have a higher clamping voltage (25.8V)?

A: Clamping voltage variation within the same voltage class is a normal characteristic of TVS diode manufacturing. The 5KP14E3/TR13 operates within acceptable tolerance bands for 14V-class suppressors. The higher clamping voltage may provide slightly different transient response characteristics but maintains compatibility with 14V protection applications.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts use the P600 axial through-hole package, ensuring mechanical and thermal compatibility. Packaging format (cut tape, tape & reel, bulk) differs but does not affect circuit-level performance or PCB mounting.

Q: What compliance certifications apply to these substitute parts?

A: All parts are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level). SLD14U-017-B additionally carries AEC-Q101 automotive qualification. All parts meet REACH requirements where applicable.