P6KE68A-B Equivalent & Substitute Parts

Part Overview

The P6KE68A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage transient protection applications. This through-hole component operates with a reverse standoff voltage of 58.1V and provides clamping at 92V maximum, with a peak pulse current rating of 6.6A. The part is Active status and RoHS3 compliant, making it suitable for modern electronic circuit protection requirements. Equivalent and substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and operational parameters that ensure functional interchangeability in circuit applications.

Substiute Parts

P6KE68A-B

Littelfuse Inc.In Stock: 1188P6KE68A-B Datasheet

Current PartRFQ

P6KE68A

Fairchild SemiconductorIn Stock: 8738P6KE68A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P6KE68A-B is determined by the following critical parameters:

• Voltage Rating Match: Reverse standoff voltage of 58.1V, breakdown voltage minimum of 64.6V, and clamping voltage maximum of 92V must be identical or within acceptable tolerance
• Current Rating: Peak pulse current of 6.6A or higher ensures adequate transient suppression capability
• Power Dissipation: Peak pulse power rating of 600W or greater maintains thermal performance
• Package Compatibility: DO-204AC (DO-15) axial through-hole package ensures mechanical fit and PCB integration
• Diode Type: Unidirectional Zener configuration with single channel
• Operational Range: Operating temperature range must support the application environment

The P6KE68A substitute part maintains identical electrical specifications while originating from an alternative manufacturer (Fairchild Semiconductor), confirming functional interchangeability for circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

Both the P6KE68A-B (Littelfuse Inc.) and P6KE68A (Fairchild Semiconductor) are Active status components suitable for equivalent substitution in general-purpose transient voltage suppression circuits. The primary distinction is the peak pulse current specification: the Fairchild variant provides 6.8A compared to the Littelfuse 6.6A rating, representing a marginal performance advantage. The Littelfuse part carries explicit ROHS3 compliance certification, while the Fairchild part does not specify this compliance status in the provided data. Both components share identical voltage ratings, power dissipation, package configuration, and mounting type. Selection between these parts should be based on supply chain availability, compliance documentation requirements, and current rating margin needs for the specific application.

Frequently Asked Questions (FAQ)

Q: Can the P6KE68A (Fairchild) directly replace the P6KE68A-B (Littelfuse) in existing designs?

A: Yes. Both parts share identical voltage ratings (58.1V standoff, 92V clamping), power dissipation (600W), package type (DO-204AC/DO-15 axial), and mounting configuration (through-hole). The Fairchild variant provides slightly higher peak pulse current (6.8A vs 6.6A), which is compatible with circuit requirements designed for the Littelfuse part.

Q: What is the significance of the peak pulse current difference between these parts?

A: The P6KE68A (Fairchild) peak pulse current of 6.8A exceeds the P6KE68A-B (Littelfuse) specification of 6.6A. This represents a 3% increase in transient current handling capability and does not create compatibility issues when substituting the Fairchild part into circuits designed for the Littelfuse component.

Q: Are there temperature range considerations for substitution?

A: The P6KE68A-B operates from -55°C to 175°C, while the P6KE68A operates from -50°C to 175°C. The Littelfuse part provides 5°C additional low-temperature performance. For applications requiring operation below -50°C, the P6KE68A-B is the appropriate selection.

Q: Does RoHS compliance affect substitution decisions?

A: The P6KE68A-B carries explicit ROHS3 compliance certification. The P6KE68A compliance status is not specified in available data. Applications requiring documented RoHS compliance should prioritize the Littelfuse P6KE68A-B or obtain compliance documentation from Fairchild for the substitute part.

Q: Are the DO-204AC and DO-15 package designations interchangeable?

A: Yes. DO-204AC and DO-15 are equivalent designations for the same axial through-hole package configuration. Both the P6KE68A-B and P6KE68A use this identical package, ensuring mechanical and electrical compatibility on PCBs designed for either designation.