P4KE6.8C Equivalent & Substitute Parts

Part Overview

The P4KE6.8C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 5.8V reverse standoff voltage, 11.03V maximum clamping voltage, and 400W peak pulse power rating in a through-hole DO-204AL (DO-41) axial package. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Substiute Parts

P4KE6.8C

Littelfuse Inc.In Stock: 767P4KE6.8C Datasheet

Current PartRFQ

P4KE6.8CA

Taiwan Semiconductor CorporationIn Stock: 998P4KE6.8CA Datasheet

DirectRFQ

P4KE6.8CA-G

Comchip TechnologyIn Stock: 1064P4KE6.8CA-G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P4KE6.8C is determined by strict alignment with the following electrical and mechanical parameters:

• Reverse standoff voltage: 5.8V (typical)
• Breakdown voltage minimum: ≥6.12V
• Clamping voltage maximum: ≤11.03V @ Ipp
• Peak pulse current: ≥39A (10/1000µs)
• Peak pulse power: 400W
• Package: DO-204AL or DO-41 axial through-hole
• Bidirectional channels: 1
• RoHS3 compliance required

The identified substitute parts meet these criteria while offering active product status and improved availability compared to the obsolete P4KE6.8C.

Parameter Comparison

Engineering Selection Recommendations

Both P4KE6.8CA and P4KE6.8CA-G are active alternatives to the obsolete P4KE6.8C, with all three parts sharing the same base product number (P4KE6.8) and meeting ROHS3 compliance requirements.

P4KE6.8CA (Taiwan Semiconductor Corporation) maintains identical operating temperature range (-55 to 175°C) and offers improved clamping voltage performance (10.5V vs. 11.03V), with peak pulse current of 40A. This part is available in Tape & Reel packaging.

P4KE6.8CA-G (Comchip Technology) provides equivalent electrical performance with 10.5V clamping voltage and 38.1A peak pulse current. The operating temperature range is reduced to -55 to 150°C. This part is available in bulk packaging.

Both substitutes demonstrate lower clamping voltages than the original part, resulting in improved transient suppression characteristics. Selection between these alternatives depends on packaging requirements, temperature operating envelope, and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can P4KE6.8CA and P4KE6.8CA-G be used interchangeably with P4KE6.8C?

A: Both parts meet the core electrical substitution criteria: 5.8V reverse standoff voltage, ≥39A peak pulse current, and 400W peak pulse power in DO-41 axial through-hole packages. However, the reduced maximum operating temperature of P4KE6.8CA-G (-55 to 150°C vs. -55 to 175°C) must be evaluated against application requirements.

Q: What is the significance of the lower clamping voltage in the substitute parts?

A: The P4KE6.8CA and P4KE6.8CA-G both feature 10.5V maximum clamping voltage compared to 11.03V for the P4KE6.8C. This represents improved transient suppression performance, as lower clamping voltage provides better protection of downstream circuitry during overvoltage events.

Q: Are packaging differences between Tape & Reel and Bulk significant for substitution?

A: Packaging format affects handling, storage, and assembly processes but does not impact electrical or mechanical compatibility. Selection depends on manufacturing workflow and volume requirements.

Q: Do all three parts meet current compliance standards?

A: Yes. P4KE6.8C, P4KE6.8CA, and P4KE6.8CA-G are all ROHS3 compliant. P4KE6.8CA and P4KE6.8CA-G additionally carry REACH Unaffected status.

Q: What is the base product number relationship?

A: All three parts share the base product number P4KE6.8, indicating they belong to the same product family with identical voltage rating and package type. Suffix designations (C, CA, CA-G) identify manufacturer-specific variants.