P4KE6.8 Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The P4KE6.8 is a unidirectional Transient Voltage Suppressor (TVS) diode in DO-204AL (DO-41) axial package designed for general-purpose transient voltage protection applications. Manufactured by Littelfuse Inc., this component operates across a temperature range of -55°C to 175°C and provides 400W peak pulse power dissipation capability.

The P4KE6.8 is classified as obsolete. Identifying equivalent and substitute parts ensures design continuity and maintains supply chain reliability for applications requiring this voltage suppression specification.

Substiute Parts

P4KE6.8

Littelfuse Inc.In Stock: 978P4KE6.8 Datasheet

Current PartRFQ

P4KE6.8A

Taiwan Semiconductor CorporationIn Stock: 300261P4KE6.8A Datasheet

DirectRFQ

P4KE6.8A-G

Comchip TechnologyIn Stock: 779P4KE6.8A-G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4KE6.8 is determined by the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 5.8V
• Voltage - Clamping (Max) @ Ipp: Maximum 11.03V
• Current - Peak Pulse (10/1000µs): Minimum 39A
• Power - Peak Pulse: 400W
• Package / Case: DO-204AL or DO-41 axial through-hole
• Unidirectional Channels: 1
• Type: Zener TVS Diode

Substitute parts must maintain compatibility across these parameters to ensure functional equivalence in transient voltage suppression applications. The following parts meet these substitution criteria.

Parameter Comparison

Engineering Selection Recommendations

P4KE6.8A (Taiwan Semiconductor Corporation) is the primary substitute for the obsolete P4KE6.8. This part maintains identical reverse standoff voltage (5.8V), equivalent clamping voltage (10.5V vs. 11.03V), and matching power dissipation (400W). Peak pulse current capability is marginally higher at 40A compared to 39A. The part is in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Packaging is DO-204AL (DO-41) axial through-hole, directly compatible with original designs.

P4KE6.8A-G (Comchip Technology) serves as a secondary substitute option. This part meets the same voltage and power specifications with clamping voltage of 10.5V and peak pulse current of 38.1A. Operating temperature range is reduced to -55°C to 150°C compared to 175°C maximum junction temperature of the primary substitute. Packaging is DO-41 axial through-hole. This part is in active production with ROHS3 compliance.

Both substitute parts are ROHS3 compliant and maintain the unidirectional TVS diode configuration required for general-purpose transient voltage protection applications.

Frequently Asked Questions (FAQ)

Q: Can P4KE6.8A be used as a direct replacement for P4KE6.8?

A: Yes. P4KE6.8A maintains the critical electrical parameters: 5.8V reverse standoff voltage, 10.5V clamping voltage, 40A peak pulse current, and 400W power dissipation. The DO-204AL (DO-41) axial package is mechanically and electrically compatible with the original P4KE6.8 design.

Q: What is the difference between P4KE6.8A and P4KE6.8A-G?

A: Both parts share identical reverse standoff voltage (5.8V) and clamping voltage (10.5V). The primary difference is operating temperature range: P4KE6.8A operates to 175°C junction temperature, while P4KE6.8A-G is rated to 150°C. Peak pulse current differs slightly: 40A versus 38.1A respectively. Both are packaged in DO-41 axial through-hole format.

Q: Are all substitute parts RoHS compliant?

A: Yes. P4KE6.8A and P4KE6.8A-G are both ROHS3 compliant, matching the compliance status of the original P4KE6.8.

Q: Does package compatibility affect substitution?

A: All substitute parts use DO-204AL or DO-41 axial through-hole packaging, which are mechanically and electrically equivalent. Direct board-level substitution is supported without layout modifications.

Q: What determines whether a part qualifies as a substitute?

A: Substitution is based on matching reverse standoff voltage (5.8V), maintaining clamping voltage within acceptable range (10.5V to 11.03V), meeting or exceeding peak pulse current (39A minimum), and providing equivalent 400W power dissipation in compatible through-hole axial packaging.