P6KE68A-T Equivalent & Substitute Parts

Part Overview

The P6KE68A-T is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in through-hole applications. This component features a 58.1V reverse standoff voltage with a 92V maximum clamping voltage and 6.5A peak pulse current capability. The part is classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	58.1V
Voltage - Breakdown (Min)	64.6V
Voltage - Clamping (Max) @ Ipp	92V
Current - Peak Pulse (10/1000µs)	6.5A
Power - Peak Pulse	600W
Type	Zener
Unidirectional Channels	1
Mounting Type	Through Hole
Package / Case	DO-204AC, DO-15, Axial
Operating Temperature	-55°C ~ 175°C (TJ)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the P6KE68A-T is determined by strict electrical and mechanical parameter matching:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 58.1V
Voltage - Clamping (Max) @ Ipp: 92V
Current - Peak Pulse (10/1000µs): 6.5A minimum
Power - Peak Pulse: 600W
Type: Zener, Unidirectional
Mounting Type: Through Hole
Package / Case: DO-204AC or DO-15 compatible

All substitute parts listed maintain these core electrical specifications within the allowed tolerance range. Peak pulse current values up to 6.8A are acceptable as they represent improved performance margins without exceeding the clamping voltage or power dissipation limits. Operating temperature ranges may vary by manufacturer but must support the minimum -55°C to 175°C envelope.

Parameter Comparison

Part Number	Manufacturer	VWM (Typ)	VBR (Min)	VC (Max)	Ipp (A)	Power (W)	Temp Range	Package	Status
P6KE68A-T	Diodes Incorporated	58.1V	64.6V	92V	6.5	600	-55 to 175°C	DO-15	Obsolete
P6KE68A-B	Littelfuse Inc.	58.1V	64.6V	92V	6.6	600	-55 to 175°C	DO-204AC	Active
P6KE68A	Fairchild Semiconductor	58.1V	64.6V	92V	6.8	600	-50 to 175°C	DO-15	Active
P6KE68A-AP	Micro Commercial Co	58.1V	64.6V	92V	6.5	600	-55 to 175°C	DO-15	Active
P6KE68A-BP	Micro Commercial Co	58.1V	64.6V	92V	6.5	600	-55 to 175°C	DO-15	Active
P6KE68A-E3/54	Vishay General Semiconductor	58.1V	64.6V	92V	6.5	600	-55 to 175°C	DO-204AC	Active
P6KE68A-TP	Micro Commercial Co	58.1V	64.6V	92V	6.5	600	-55 to 175°C	DO-15	Active
P6KE68AE3/TR13	Microsemi Corporation	58.1V	64.6V	92V	6.5	600	-65 to 150°C	Axial	Active
P6KE68AHE3/54	Vishay General Semiconductor	58.1V	64.6V	92V	6.5	600	-55 to 175°C	DO-204AC	Active
P6KE68AHE3/73	Vishay General Semiconductor	58.1V	64.6V	92V	6.5	600	-55 to 175°C	DO-204AC	Active

Engineering Selection Recommendations

Primary Substitutes (Direct Replacement):

P6KE68A-B (Littelfuse Inc.) and P6KE68A-TP (Micro Commercial Co) are the preferred direct replacements. Both maintain identical electrical specifications with active product status and full ROHS3 compliance. P6KE68A-B offers slightly higher peak pulse current (6.6A) with DO-204AC packaging, while P6KE68A-TP provides DO-15 packaging in cut tape format.

Secondary Substitutes (Electrical Equivalents):

P6KE68A (Fairchild Semiconductor) and P6KE68A-AP (Micro Commercial Co) are electrically equivalent with active status. The Fairchild part supports a marginally lower minimum operating temperature (-50°C vs -55°C) and offers higher peak pulse current (6.8A). Both are suitable for applications within the specified temperature envelope.

Automotive-Qualified Alternatives:

P6KE68AHE3/54 and P6KE68AHE3/73 (Vishay General Semiconductor) are AEC-Q101 qualified automotive-grade variants with identical electrical performance and full temperature range support (-55°C to 175°C). These parts are appropriate for automotive and mission-critical applications requiring formal qualification documentation.

Axial Package Option:

P6KE68AE3/TR13 (Microsemi Corporation) provides equivalent electrical performance in axial through-hole format. Operating temperature range is -65°C to 150°C, which covers the original specification envelope. This option is suitable for applications with axial lead requirements.

Frequently Asked Questions (FAQ)

Q: Can I use P6KE68A with a -50°C minimum operating temperature instead of -55°C?

A: Yes, if your application's minimum operating temperature is -50°C or higher. The P6KE68A (Fairchild) meets all other electrical specifications identically. Verify your system's thermal requirements before selection.

Q: What is the difference between DO-15 and DO-204AC packaging?

A: DO-15 and DO-204AC are equivalent package designations for the same physical form factor. Both are axial through-hole diodes with identical lead spacing and mounting characteristics. Selection depends on your PCB design and component placement requirements.

Q: Are the Vishay TransZorb® parts (P6KE68A-E3/54, P6KE68AHE3/54, P6KE68AHE3/73) interchangeable with standard P6KE68A variants?

A: Yes. TransZorb® is Vishay's product line designation. These parts maintain identical electrical specifications and through-hole mounting compatibility. The AHE3 variants include automotive qualification (AEC-Q101), making them suitable for regulated applications.

Q: What is the difference between cut tape (CT) and tape & reel (TR) packaging?

A: Cut tape and tape & reel are packaging and delivery formats only. Electrically and mechanically, the components are identical. Cut tape is suitable for small-quantity assembly, while tape & reel is optimized for automated pick-and-place equipment in high-volume production.

Q: Can I substitute a part with higher peak pulse current (6.8A vs 6.5A)?

A: Yes. Higher peak pulse current represents improved performance margin without exceeding the 92V clamping voltage or 600W power dissipation limits. The P6KE68A (Fairchild) with 6.8A Ipp is a valid substitute.

Q: Are all listed substitutes ROHS3 compliant?

A: All active substitutes listed are ROHS3 compliant. Verify compliance documentation with your supplier for specific lot codes if required for regulated applications.

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