P6KE68 Equivalent & Substitute Parts

Part Overview

The P6KE68 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 55.1V reverse standoff voltage rating and 600W peak pulse power handling capability in a through-hole DO-15 (DO-204AC) package. The part is classified as obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

P6KE68

Littelfuse Inc.In Stock: 841P6KE68 Datasheet

Current PartRFQ

P6KE68A

Fairchild SemiconductorIn Stock: 8738P6KE68A Datasheet

MFR RecommendedRFQ

P6KE68A

Fairchild SemiconductorIn Stock: 8738P6KE68A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P6KE68 is determined by the following critical parameters:

• Unidirectional channel configuration (1 channel required)
• Voltage - Reverse Standoff rating within specification (58.1V typical)
• Voltage - Breakdown minimum rating (61.2V or higher)
• Voltage - Clamping maximum rating (96.6V or lower)
• Power - Peak Pulse rating (600W minimum)
• Through-hole mounting in DO-15 (DO-204AC) package
• Operating temperature range compatibility (-55°C to 175°C or equivalent)
• General-purpose application suitability

The P6KE68A from Fairchild Semiconductor meets all substitution criteria, maintaining electrical equivalence across voltage ratings, power handling, and thermal specifications while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The P6KE68A from Fairchild Semiconductor is the qualified substitute for the obsolete P6KE68. Selection is supported by the following factors:

• Active product status ensures long-term availability and supply chain continuity
• Electrical parameters maintain functional equivalence across all critical voltage and power ratings
• DO-15 (DO-204AC) axial through-hole package provides direct mechanical compatibility
• Operating temperature range (-50°C to 175°C) covers the majority of applications within the original specification
• ROHS3 compliance baseline is maintained
• Peak pulse power rating of 600W matches the original specification exactly

For applications requiring the full -55°C lower temperature limit of the original P6KE68, thermal performance validation in the specific circuit environment is necessary.

Frequently Asked Questions (FAQ)

Q: Can the P6KE68A be used as a direct replacement for P6KE68 in existing designs?

A: Yes. The P6KE68A maintains electrical equivalence in reverse standoff voltage, breakdown voltage, clamping voltage, and peak pulse power rating. The through-hole DO-15 package provides identical mechanical fit. The operating temperature range difference (-50°C minimum versus -55°C minimum) should be evaluated for applications operating below -50°C.

Q: What is the difference in clamping voltage between P6KE68 and P6KE68A?

A: The P6KE68 specifies a maximum clamping voltage of 96.6V, while the P6KE68A specifies 92V. The lower clamping voltage of the P6KE68A provides improved transient suppression performance in this application class.

Q: Are there any package or pinout differences?

A: No. Both parts use the DO-15 (DO-204AC) axial through-hole package with identical pinout and mechanical dimensions. No PCB layout modifications are required.

Q: Why is the P6KE68 marked as obsolete?

A: Littelfuse Inc. has discontinued the P6KE68 in favor of newer product lines. The P6KE68A from Fairchild Semiconductor provides functional continuity for existing applications.

Q: What compliance certifications apply to the P6KE68A?

A: The P6KE68A meets the same ECCN (EAR99) and HTSUS (8541.10.0080) classifications as the original P6KE68, ensuring regulatory equivalence for export and procurement purposes.