P6KE68CA Equivalent & Substitute Parts

Part Overview

The P6KE68CA is a transient voltage suppressor (TVS) diode in DO-15 package configuration, designed for general-purpose voltage clamping applications. This component features a 58.1V reverse standoff voltage with 92V maximum clamping voltage and 6.5A peak pulse current capability. The original Diodes Incorporated P6KE68CA-T is classified as obsolete, necessitating identification of active equivalent parts from alternative manufacturers that maintain identical electrical and mechanical specifications for direct circuit substitution.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the P6KE68CA is determined by strict equivalence across the following electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 58.1V
Voltage - Breakdown (Min): 64.6V
Voltage - Clamping (Max) @ Ipp: 92V
Current - Peak Pulse (10/1000µs): 6.5A minimum
Power - Peak Pulse: 600W
Mounting Type: Through Hole
Package / Case: DO-204AC or DO-15 (equivalent designations)
Type: Zener, Bidirectional, Single Channel

All substitute parts listed maintain these core electrical specifications within the allowed tolerances. Packaging variants (Cut Tape, Bulk, Tape & Reel) and manufacturer-specific suffixes do not affect electrical equivalence. Parts with identical base specifications but different peak pulse current ratings (6.6A, 6.8A) remain functionally equivalent within the application envelope.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Clamping (V)	Current - Peak Pulse (A)	Operating Temperature (°C)	Product Status	Package
P6KE68CA-T	Diodes Incorporated	58.1	92	6.5	-55 to 175	Obsolete	DO-15
P6KE68CA-B	Littelfuse Inc.	58.1	92	6.6	-55 to 175	Active	DO-204AC
P6KE68CA	Fairchild Semiconductor	58.1	92	6.8	-50 to 175	Active	DO-15
P6KE68CA-AP	Micro Commercial Co	58.1	92	6.5	-55 to 175	Active	DO-15
P6KE68CA-BP	Micro Commercial Co	58.1	92	6.5	-55 to 175	Active	DO-15
P6KE68CA-E3/54	Vishay General Semiconductor - Diodes Division	58.1	92	6.5	-55 to 175	Active	DO-204AC
P6KE68CA-TP	Micro Commercial Co	58.1	92	6.5	-55 to 175	Active	DO-15
P6KE68CAE3/TR13	Microsemi Corporation	58.1	92	6.5	-65 to 150	Active	Axial
P6KE68CAHE3/54	Vishay General Semiconductor - Diodes Division	58.1	92	6.5	-55 to 175	Active	DO-204AC
P6KE68CAHE3/73	Vishay General Semiconductor - Diodes Division	58.1	92	6.5	-55 to 175	Active	DO-204AC

Engineering Selection Recommendations

All listed substitute parts are active products with full manufacturing support, eliminating obsolescence risk associated with the original P6KE68CA-T. Selection among equivalents should prioritize the following factors:

Compliance and Certification: Parts designated with automotive-grade qualification (AEC-Q101) such as P6KE68CAHE3/54 and P6KE68CAHE3/73 provide enhanced reliability documentation for mission-critical applications. All listed parts maintain ROHS3 compliance and EAR99 export classification.

Packaging Compatibility: DO-15 and DO-204AC designations are mechanically equivalent for through-hole PCB mounting. Axial package variants (P6KE68CAE3/TR13) require board layout accommodation for axial lead orientation. Cut Tape and Tape & Reel packaging options support automated assembly workflows; Bulk packaging suits manual assembly or low-volume production.

Temperature Operating Range: The Fairchild Semiconductor P6KE68CA operates at -50°C minimum versus -55°C for other variants. The Microsemi P6KE68CAE3/TR13 operates to 150°C maximum versus 175°C for standard variants. These differences are application-dependent and should be evaluated against circuit thermal requirements.

Inventory Availability: Micro Commercial Co variants (P6KE68CA-TP, P6KE68CA-AP, P6KE68CA-BP) and Vishay TransZorb® series (P6KE68CAHE3/54, P6KE68CAHE3/73) maintain the highest stock levels, supporting rapid procurement timelines.

Frequently Asked Questions (FAQ)

Q: Can P6KE68CA-B from Littelfuse be used as a direct replacement for P6KE68CA-T?

A: Yes. The P6KE68CA-B maintains identical voltage specifications (58.1V standoff, 92V clamping) and equivalent peak pulse current (6.6A versus 6.5A). The DO-204AC package designation is mechanically equivalent to DO-15. Both are through-hole mounted components with identical pinout and footprint compatibility.

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

A: DO-15 and DO-204AC are equivalent package designations for the same physical component form factor. DO-204AC is the JEDEC standardized designation; DO-15 is the legacy designation. Both refer to a two-lead axial through-hole diode package with identical mechanical dimensions and PCB mounting requirements.

Q: Are Vishay TransZorb® parts (P6KE68CAHE3/54, P6KE68CAHE3/73) compatible with the original circuit design?

A: Yes. These parts maintain all core electrical parameters: 58.1V reverse standoff, 92V clamping voltage, and 6.5A peak pulse current. The TransZorb® designation is a Vishay product line identifier and does not affect electrical equivalence. AEC-Q101 automotive qualification provides additional reliability documentation for applications requiring enhanced traceability.

Q: Can the axial package variant (P6KE68CAE3/TR13) be used on a PCB designed for DO-15 radial leads?

A: No. The axial package has leads extending from opposite ends of the component body, requiring different PCB pad spacing and board layout. DO-15 and DO-204AC components have leads extending from the same end. PCB redesign is necessary to accommodate axial package variants.

Q: What is the significance of the temperature range difference in the Fairchild P6KE68CA (-50°C to 175°C versus -55°C to 175°C)?

A: The Fairchild variant operates at a 5°C higher minimum temperature. This is functionally equivalent for applications with minimum ambient temperatures above -50°C. Applications requiring operation below -50°C must use alternative suppliers (Micro Commercial Co, Vishay, Littelfuse) that specify -55°C minimum.

Q: Are all listed parts RoHS3 compliant?

A: All substitute parts listed maintain ROHS3 compliance status. The original P6KE68CA-T is also ROHS3 compliant. This ensures lead-free solder compatibility and environmental regulatory compliance across all equivalent options.

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