P4KE6.8-B Equivalent & Substitute Parts

Part Overview

The P4KE6.8-B is a unidirectional 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 and 11.03V maximum clamping voltage with 39A peak pulse current capability in a through-hole DO-204AL (DO-41) axial package. The part is currently classified as obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

P4KE6.8-B

Littelfuse Inc.In Stock: 877P4KE6.8-B Datasheet

Current PartRFQ

P4KE6.8A

Taiwan Semiconductor CorporationIn Stock: 300261P4KE6.8A Datasheet

DirectRFQ

P4KE6.8A-B

Littelfuse Inc.In Stock: 928P4KE6.8A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4KE6.8-B is determined by strict equivalence across the following critical parameters:

• Reverse standoff voltage: 5.8V (Typ)
• Unidirectional channel configuration: 1 channel
• Package type: DO-204AL (DO-41) through-hole axial
• Operating temperature range: -55°C to 175°C (TJ)
• Series classification: P4KE
• RoHS3 compliance requirement

The identified substitute parts maintain these core electrical and mechanical specifications while offering active product status and improved availability. Variations in clamping voltage (10.5V vs. 11.03V) and peak pulse current (39A to 40A) remain within acceptable tolerance ranges for the P4KE series design envelope and do not disqualify substitution eligibility.

Parameter Comparison

Engineering Selection Recommendations

Both P4KE6.8A-B and P4KE6.8A are qualified substitutes for the obsolete P4KE6.8-B based on electrical parameter equivalence and compliance certifications.

P4KE6.8A-B (Littelfuse Inc.): This part maintains Littelfuse manufacturer continuity and is supplied in bulk packaging. Active product status ensures long-term availability and supply chain stability. ROHS3 compliance and REACH unaffected status are confirmed.

P4KE6.8A (Taiwan Semiconductor Corporation): This part is supplied in Tape & Reel format, suitable for automated assembly processes. Active product status and ROHS3 compliance are confirmed. REACH unaffected status is documented.

Selection between these substitutes should be based on packaging requirements (bulk vs. tape & reel), procurement volume, and supply chain preferences. Both parts satisfy the electrical and thermal specifications of the original P4KE6.8-B design.

Frequently Asked Questions (FAQ)

Q: Can P4KE6.8A-B or P4KE6.8A be used as direct replacements for P4KE6.8-B?

A: Yes. Both parts maintain the critical electrical parameters: 5.8V reverse standoff voltage, DO-204AL through-hole package, and -55°C to 175°C operating temperature range. The clamping voltage difference (10.5V vs. 11.03V) and peak pulse current variation (39A to 40A) are within the P4KE series design tolerance envelope.

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

A: The primary differences are manufacturer and packaging format. P4KE6.8A-B is manufactured by Littelfuse Inc. and supplied in bulk. P4KE6.8A is manufactured by Taiwan Semiconductor Corporation and supplied in Tape & Reel format. Electrical specifications are equivalent.

Q: Why is the clamping voltage different between the main part and substitutes?

A: The P4KE6.8-B specifies 11.03V maximum clamping voltage, while P4KE6.8A variants specify 10.5V. Both values fall within acceptable operating margins for the P4KE series and do not prevent functional substitution in general-purpose transient voltage suppression applications.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both P4KE6.8A-B and P4KE6.8A are ROHS3 compliant and suitable for applications requiring RoHS certification.

Q: Which substitute should I select for high-volume automated assembly?

A: P4KE6.8A in Tape & Reel packaging is optimized for automated pick-and-place assembly processes. P4KE6.8A-B in bulk packaging is suitable for manual assembly or lower-volume applications.