P4KE27 Equivalent & Substitute Parts

Part Overview

The P4KE27 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection in through-hole applications. This component features a 23.1V reverse standoff voltage and 400W peak pulse power rating in a DO-204AL (DO-41) axial package. The P4KE27 is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. Substitute parts maintain electrical and mechanical compatibility while offering active product status from alternative manufacturers.

Substiute Parts

P4KE27

Littelfuse Inc.In Stock: 1099P4KE27 Datasheet

Current PartRFQ

P4KE27A

Taiwan Semiconductor CorporationIn Stock: 756P4KE27A Datasheet

DirectRFQ

P4KE27A-AP

Micro Commercial CoIn Stock: 863P4KE27A-AP Datasheet

MFR RecommendedRFQ

P4KE27A-BP

Micro Commercial CoIn Stock: 983P4KE27A-BP Datasheet

MFR RecommendedRFQ

P4KE27A-G

Comchip TechnologyIn Stock: 807P4KE27A-G Datasheet

MFR RecommendedRFQ

P4KE27A-TP

Micro Commercial CoIn Stock: 877P4KE27A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE27 are qualified based on the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 23.1V (exact match required)
• Voltage - Clamping (Max) @ Ipp: 37.5V to 39.38V (within acceptable range)
• Current - Peak Pulse (10/1000µs): 10.67A to 11A (within acceptable range)
• Power - Peak Pulse: 400W (exact match required)
• Type: Zener diode, unidirectional (1 channel)
• Operating Temperature: -55°C minimum to 150°C or higher maximum

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: DO-204AL, DO-41, Axial
• Applications: General Purpose

All substitute parts listed maintain these parameters within acceptable engineering tolerances for direct circuit substitution.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are qualified for direct replacement of the obsolete P4KE27 based on electrical and mechanical parameter equivalence. Selection among substitute options should consider the following factors:

Product Status: All substitute parts maintain active product status, ensuring long-term availability and supply chain continuity compared to the obsolete P4KE27.

Compliance & Certifications: P4KE27A (Taiwan Semiconductor Corporation) and P4KE27A-G (Comchip Technology) carry explicit ROHS3 compliance certification. Parts from Micro Commercial Co (P4KE27A-AP, P4KE27A-BP, P4KE27A-TP) do not specify RoHS status in provided documentation.

Operating Temperature Range: P4KE27A-G (Comchip Technology) operates to a maximum of 150°C, compared to 175°C for all other substitutes. Applications requiring operation above 150°C should select alternatives from Taiwan Semiconductor Corporation or Micro Commercial Co.

Packaging Availability: P4KE27A (Taiwan Semiconductor Corporation) is available in Tape & Reel packaging, suitable for automated assembly. All other substitutes are supplied in Bulk packaging.

Frequently Asked Questions (FAQ)

Q: Can P4KE27A substitute parts be used interchangeably with the original P4KE27?

A: Yes. All listed substitute parts maintain identical reverse standoff voltage (23.1V), peak pulse power (400W), and mechanical compatibility (DO-41 through-hole package). Clamping voltage and peak pulse current remain within acceptable engineering tolerances across all substitutes.

Q: What is the primary reason for substitution?

A: The P4KE27 is classified as obsolete. Substitute parts from Taiwan Semiconductor Corporation, Micro Commercial Co, and Comchip Technology provide equivalent electrical performance with active product status and assured long-term availability.

Q: Are there differences in clamping voltage between the P4KE27 and its substitutes?

A: The original P4KE27 specifies a maximum clamping voltage of 39.38V at peak pulse current. All substitute parts specify 37.5V maximum clamping voltage. This represents a 1.88V reduction and remains within acceptable design margins for general-purpose transient voltage suppression applications.

Q: Which substitute part offers the best compliance documentation?

A: P4KE27A (Taiwan Semiconductor Corporation) and P4KE27A-G (Comchip Technology) both carry explicit ROHS3 compliance certification. Both parts also confirm REACH Unaffected status. For applications requiring documented environmental compliance, these options are preferred.

Q: Does operating temperature range affect part selection?

A: P4KE27A-G (Comchip Technology) operates to a maximum junction temperature of 150°C, while all other substitutes operate to 175°C. For applications with sustained operation above 150°C, select P4KE27A, P4KE27A-AP, P4KE27A-BP, or P4KE27A-TP.

Q: What packaging options are available?

A: P4KE27A (Taiwan Semiconductor Corporation) is supplied in Tape & Reel packaging for automated assembly processes. P4KE27A-AP, P4KE27A-BP, and P4KE27A-TP (Micro Commercial Co) and P4KE27A-G (Comchip Technology) are supplied in Bulk packaging for manual assembly or lower-volume applications.

Q: Are all substitute parts available in DO-41 package?

A: Yes. All substitute parts are available in DO-41 axial package configuration. P4KE27A (Taiwan Semiconductor Corporation) additionally supports DO-204AL package variant.