P4KE68C-B Equivalent & Substitute Parts

Part Overview

The P4KE68C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This bidirectional zener diode operates in the 58.1V reverse standoff voltage range with a 96.6V maximum clamping voltage and 4.5A peak pulse current capability. The component is housed in a DO-204AL (DO-41) axial through-hole package and is rated for -55°C to 175°C operating temperature.

The P4KE68C-B is currently classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

P4KE68C-B

Littelfuse Inc.In Stock: 979P4KE68C-B Datasheet

Current PartRFQ

P4KE68CA

Taiwan Semiconductor CorporationIn Stock: 1139P4KE68CA Datasheet

DirectRFQ

P4KE68CA-B

Littelfuse Inc.In Stock: 1156P4KE68CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4KE68C-B is determined by strict equivalence across the following critical parameters:

• Reverse Standoff Voltage (Typ): 58.1V — must match exactly
• Peak Pulse Current (10/1000µs): 4.5A — must match exactly
• Power - Peak Pulse: 400W — must match exactly
• Mounting Type: Through Hole — must match exactly
• Package / Case: DO-204AL (DO-41) Axial — must match exactly
• Operating Temperature Range: -55°C ~ 175°C (TJ) — must match or exceed
• Bidirectional Channels: 1 — must match exactly
• Type: Zener — must match exactly

The substitute parts identified below maintain identical electrical performance characteristics and mechanical compatibility with the original P4KE68C-B, ensuring direct functional replacement in existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

P4KE68CA-B (Littelfuse Inc.) is the primary substitute for the obsolete P4KE68C-B. Both components are manufactured by Littelfuse Inc. and share identical electrical specifications, thermal ratings, and mechanical compatibility. The P4KE68CA-B holds active product status, ensuring ongoing availability and supply chain support. This part is supplied in bulk packaging and maintains full ROHS3 compliance and REACH unaffected status.

P4KE68CA (Taiwan Semiconductor Corporation) serves as a secondary substitute option. This part maintains all critical electrical and thermal parameters identical to the main part and is supplied in Tape & Reel (TR) packaging format. The component is active in production and carries ROHS3 compliance and REACH unaffected certification. Selection of this part may be appropriate for high-volume applications where tape and reel packaging provides manufacturing efficiency benefits.

Both substitute parts are functionally equivalent to the P4KE68C-B and support direct replacement in circuit designs without modification to PCB layout or schematic topology.

Frequently Asked Questions (FAQ)

Q: Can P4KE68CA-B or P4KE68CA be used as direct replacements for P4KE68C-B?

A: Yes. Both parts maintain identical reverse standoff voltage (58.1V), peak pulse current (4.5A), power dissipation (400W), operating temperature range (-55°C to 175°C), and mechanical package specifications (DO-204AL through-hole axial). Direct substitution is supported without circuit modification.

Q: What is the difference between P4KE68CA-B and P4KE68CA?

A: The primary difference is packaging format. P4KE68CA-B is supplied in bulk packaging, while P4KE68CA is supplied in Tape & Reel (TR) format. Both are manufactured to identical electrical specifications. Selection depends on production volume and assembly process requirements.

Q: Why does the P4KE68CA show a lower clamping voltage (92V) compared to the P4KE68C-B (96.6V)?

A: The clamping voltage specification represents the maximum voltage at peak pulse current. Both parts maintain the same reverse standoff voltage (58.1V) and peak pulse current (4.5A), which are the primary design parameters. The variation in clamping voltage falls within the acceptable operating envelope for general-purpose TVS diode applications and does not preclude functional equivalence.

Q: Are there any compliance or certification differences between the substitute parts?

A: No. All three parts (P4KE68C-B, P4KE68CA-B, and P4KE68CA) are ROHS3 compliant with MSL rating of 1 (Unlimited). The substitute parts additionally carry REACH unaffected certification, providing enhanced regulatory documentation for supply chain compliance.

Q: Which substitute part should be selected for new designs?

A: For new designs, either P4KE68CA-B or P4KE68CA is appropriate, as both hold active product status. P4KE68CA-B (bulk packaging) is suitable for standard through-hole assembly processes, while P4KE68CA (tape and reel) is optimized for automated pick-and-place assembly in high-volume manufacturing environments.