P6KE75-B Equivalent & Substitute Parts

Part Overview

The P6KE75-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This unidirectional Zener diode operates in the DO-204AC (DO-15) axial through-hole package and provides 600W peak pulse power dissipation with a 64.1V reverse standoff voltage. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

P6KE75-B

Littelfuse Inc.In Stock: 757P6KE75-B Datasheet

Current PartRFQ

P6KE75A

Fairchild SemiconductorIn Stock: 3064P6KE75A Datasheet

DirectRFQ

P6KE75A-B

Littelfuse Inc.In Stock: 1239P6KE75A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6KE75-B is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 64.1V
• Voltage - Breakdown (Min): 67.55V minimum
• Power - Peak Pulse: 600W
• Mounting Type: Through Hole
• Package / Case: DO-204AC (DO-15) Axial
• Unidirectional Channels: 1
• Type: Zener

The identified substitute parts maintain the same reverse standoff voltage and peak pulse power rating, ensuring functional compatibility in existing circuit designs. Variations in clamping voltage and peak pulse current are within acceptable ranges for general-purpose TVS applications.

Parameter Comparison

Engineering Selection Recommendations

Both P6KE75A and P6KE75A-B are active production alternatives to the obsolete P6KE75-B. The P6KE75A-B (Littelfuse) is the preferred substitute, maintaining identical manufacturer lineage, RoHS3 compliance, and the full operating temperature range (-55°C ~ 175°C) of the original part. The P6KE75A (Fairchild Semiconductor) is functionally equivalent but operates within a narrower temperature range (-50°C ~ 175°C) and lacks specified RoHS compliance documentation.

Both substitutes feature improved clamping voltage performance (103V versus 108.15V) and measurable peak pulse current specifications, providing enhanced circuit protection characteristics. The identical reverse standoff voltage (64.1V) and power rating (600W) ensure direct functional replacement in existing designs.

Frequently Asked Questions (FAQ)

Q: Can P6KE75A and P6KE75A-B be used interchangeably with P6KE75-B?

A: Both parts meet the critical substitution parameters: identical reverse standoff voltage (64.1V), equivalent power rating (600W), and identical package configuration (DO-204AC/DO-15 axial through-hole). They are functionally compatible for general-purpose TVS applications.

Q: What is the difference between P6KE75A and P6KE75A-B?

A: Both parts share the same electrical specifications and package. P6KE75A-B is manufactured by Littelfuse (original manufacturer of P6KE75-B) and maintains full compliance certifications including RoHS3 and REACH Unaffected status. P6KE75A is manufactured by Fairchild Semiconductor and operates within a slightly narrower temperature range (-50°C to 175°C versus -55°C to 175°C).

Q: Are there package compatibility concerns when substituting these parts?

A: No. All three parts use identical DO-204AC (DO-15) axial through-hole packaging, ensuring direct mechanical and electrical compatibility on existing PCBs without layout modifications.

Q: How do the clamping voltages differ between the main part and substitutes?

A: The P6KE75-B specifies a maximum clamping voltage of 108.15V, while both P6KE75A and P6KE75A-B specify 103V. The lower clamping voltage in the substitutes provides improved transient suppression performance.

Q: Which substitute should be selected for new designs?

A: P6KE75A-B is recommended for new designs due to active production status, full compliance certifications (RoHS3, REACH Unaffected), and extended operating temperature range matching the original specification.