P4KE68C Equivalent & Substitute Parts

Part Overview

The P4KE68C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in through-hole applications. This component features a DO-204AL (DO-41) axial package with a 55.1V reverse standoff voltage and 400W peak pulse power rating. The P4KE68C is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Active alternatives from Taiwan Semiconductor Corporation, Micro Commercial Co, and Comchip Technology provide functionally compatible solutions with current product status and maintained availability.

Substiute Parts

P4KE68C

Littelfuse Inc.In Stock: 971P4KE68C Datasheet

Current PartRFQ

P4KE68CA

Taiwan Semiconductor CorporationIn Stock: 1139P4KE68CA Datasheet

DirectRFQ

P4KE68CA-AP

Micro Commercial CoIn Stock: 955P4KE68CA-AP Datasheet

MFR RecommendedRFQ

P4KE68CA-BP

Micro Commercial CoIn Stock: 889P4KE68CA-BP Datasheet

MFR RecommendedRFQ

P4KE68CA-G

Comchip TechnologyIn Stock: 1104P4KE68CA-G Datasheet

MFR RecommendedRFQ

P4KE68CA-HF

Comchip TechnologyIn Stock: 788P4KE68CA-HF Datasheet

MFR RecommendedRFQ

P4KE68CA-TP

Micro Commercial CoIn Stock: 1052P4KE68CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE68C are qualified based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 58.1V (exact match required)
• Voltage - Breakdown (Min): 61.2V to 64.6V (acceptable range)
• Current - Peak Pulse (10/1000µs): 4.35A to 4.5A (acceptable range)
• Power - Peak Pulse: 400W (exact match required)
• Type: Zener, Bidirectional (1 channel)

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: DO-204AL, DO-41, Axial
• Operating Temperature: -55°C minimum to 150°C or higher maximum

All substitute parts listed maintain these core parameters within acceptable engineering tolerances for direct circuit substitution. Voltage clamping values (92V to 96.6V) represent minor variations within the same protection class and do not preclude substitution.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status and provide direct functional equivalence to the obsolete P4KE68C. Selection among available alternatives should be based on the following factors:

Primary Selection Criteria:

P4KE68CA (Taiwan Semiconductor Corporation) offers the closest electrical match with identical reverse standoff voltage (58.1V), matching peak pulse current (4.5A), and extended operating temperature range (-55°C to 175°C). This part carries ROHS3 compliance and is available in Tape & Reel packaging, suitable for automated assembly environments.

P4KE68CA-TP (Micro Commercial Co) provides equivalent electrical specifications with 4.5A peak pulse current and full temperature range (-55°C to 175°C), available in bulk packaging for manual assembly or repair applications.

P4KE68CA-AP and P4KE68CA-BP (Micro Commercial Co) are functionally identical alternatives with matching electrical parameters and full temperature range, differentiated by packaging designation and inventory availability.

P4KE68CA-G and P4KE68CA-HF (Comchip Technology) operate within acceptable current tolerance (4.35A versus 4.5A) and maintain the required voltage specifications. These parts are limited to -55°C to 150°C operating range, suitable for applications not requiring the full 175°C upper temperature limit. Both carry ROHS3 compliance.

All substitute parts comply with REACH regulations where specified and maintain the same ECCN and HTSUS classifications as the original component.

Frequently Asked Questions (FAQ)

Q: Can P4KE68CA parts directly replace P4KE68C in existing designs?

A: Yes. All listed P4KE68CA variants maintain identical reverse standoff voltage (58.1V), matching power rating (400W), and compatible through-hole DO-41 packaging. Electrical performance remains within acceptable design tolerances for general-purpose transient voltage suppression applications.

Q: What is the significance of the voltage clamping difference (96.6V vs. 92V)?

A: The P4KE68C exhibits 96.6V maximum clamping voltage, while substitute parts clamp at 92V. Both values fall within the same protection class for 58.1V standoff devices. The lower clamping voltage of substitutes provides slightly improved transient suppression performance and remains compatible with circuit designs rated for the original component.

Q: Are there temperature limitations with Comchip alternatives?

A: P4KE68CA-G and P4KE68CA-HF from Comchip Technology operate to 150°C maximum junction temperature, compared to 175°C for the original P4KE68C and other substitutes. Applications requiring operation above 150°C should specify P4KE68CA (TSC), P4KE68CA-TP, P4KE68CA-AP, or P4KE68CA-BP alternatives.

Q: What packaging options are available?

A: P4KE68CA from Taiwan Semiconductor is supplied in Tape & Reel format for automated assembly. All Micro Commercial Co variants (P4KE68CA-AP, P4KE68CA-BP, P4KE68CA-TP) and Comchip Technology parts (P4KE68CA-G, P4KE68CA-HF) are available in bulk packaging suitable for manual assembly or component-level repair.

Q: Do all substitutes meet RoHS compliance?

A: P4KE68CA (TSC), P4KE68CA-G, and P4KE68CA-HF carry explicit ROHS3 compliance certification. Micro Commercial Co variants (P4KE68CA-AP, P4KE68CA-BP, P4KE68CA-TP) do not specify RoHS status in available documentation. Applications requiring RoHS certification should prioritize TSC or Comchip alternatives.

Q: Is the 4.35A peak pulse current of Comchip parts acceptable?

A: Yes. The 4.35A specification from Comchip variants represents a 3.3% reduction from the 4.5A rating of the original P4KE68C and other substitutes. This variation remains within acceptable engineering tolerance for general-purpose transient suppression and does not compromise circuit protection performance.