5KP78A-B Equivalent & Substitute Parts

Part Overview

The 5KP78A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This through-hole component features a 78V reverse standoff voltage with a 126V maximum clamping voltage and 40.5A peak pulse current capability. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when packaging or inventory requirements necessitate alternative sourcing while maintaining identical electrical and mechanical specifications.

Substiute Parts

5KP78A-B

Littelfuse Inc.In Stock: 8895KP78A-B Datasheet

Current PartRFQ

5KP78A

Littelfuse Inc.In Stock: 42885KP78A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution between the 5KP78A-B and 5KP78A is determined by electrical and mechanical parameter equivalence. Both parts share identical specifications across all critical parameters: 78V reverse standoff voltage, 86.7V minimum breakdown voltage, 126V maximum clamping voltage, 40.5A peak pulse current, and 5000W peak pulse power rating. Both utilize the P600 axial through-hole package and operate across the same temperature range (-55°C to 175°C). The primary distinction between these parts is packaging format: the 5KP78A-B is supplied in bulk packaging, while the 5KP78A is supplied in cut tape (CT) format. This packaging difference does not affect electrical performance or mechanical compatibility in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the 5KP78A-B and 5KP78A are active production components from Littelfuse Inc. with full ROHS3 compliance and unlimited moisture sensitivity ratings. Selection between these parts should be based on procurement and assembly requirements. The 5KP78A-B in bulk packaging is suitable for high-volume applications or manual assembly processes. The 5KP78A in cut tape format is optimized for automated pick-and-place assembly systems. Both parts meet identical electrical specifications and are mechanically interchangeable in circuit design. Compliance certifications (ROHS3, REACH status, ECCN, HTSUS codes) are equivalent for both variants.

Frequently Asked Questions (FAQ)

Q: Are the 5KP78A-B and 5KP78A electrically identical? A: Yes. Both parts share identical electrical specifications including 78V reverse standoff voltage, 126V clamping voltage, 40.5A peak pulse current, and 5000W peak pulse power rating. They are direct functional equivalents.

Q: What is the difference between bulk and cut tape packaging? A: Bulk packaging supplies components loose or in bulk quantities, suitable for manual handling and assembly. Cut tape (CT) packaging supplies components on continuous tape in precise intervals, optimized for automated assembly equipment. The electrical and mechanical performance of the component is unchanged.

Q: Can I use 5KP78A in place of 5KP78A-B in my circuit? A: Yes. The 5KP78A is a direct substitute for the 5KP78A-B. Both components are mechanically compatible with P600 axial through-hole footprints and deliver identical electrical performance across all operating conditions.

Q: Are there any compliance or certification differences? A: Both parts are ROHS3 compliant with unlimited moisture sensitivity (MSL 1). Both are active production components. Compliance certifications are equivalent.

Q: Which part should I specify for new designs? A: Either part is suitable for new designs. Selection depends on your assembly process: use 5KP78A-B for bulk/manual assembly or 5KP78A for automated tape-fed assembly systems.