P4KE12 Transient Voltage Suppressor (TVS) Equivalent & Substitute Parts

Part Overview

The P4KE12 is a unidirectional transient voltage suppressor diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 10.2V reverse standoff voltage with 400W peak pulse power handling capability in a through-hole DO-204AL (DO-41) axial package. The P4KE12 is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain functional compatibility for new designs and replacement applications.

Substiute Parts

P4KE12

Littelfuse Inc.In Stock: 992P4KE12 Datasheet

Current PartRFQ

P4KE12A

Taiwan Semiconductor CorporationIn Stock: 30224P4KE12A Datasheet

DirectRFQ

P6KE12A

Fairchild SemiconductorIn Stock: 3416P6KE12A Datasheet

MFR RecommendedRFQ

P4KE12A-G

Comchip TechnologyIn Stock: 1127P4KE12A-G Datasheet

MFR RecommendedRFQ

P6KE12A

Fairchild SemiconductorIn Stock: 3416P6KE12A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution validity for the P4KE12 is determined by the following critical parameters: reverse standoff voltage (10.2V typical), voltage clamping characteristics (maximum 17.54V @ Ipp), peak pulse current capability (24.6A minimum), peak pulse power (400W minimum), through-hole axial mounting configuration, and operating temperature range (-55°C to 175°C). All identified substitutes maintain the 10.2V reverse standoff voltage specification and general-purpose application profile. Substitutes are grouped by their adherence to these core electrical and mechanical parameters, with variations noted in clamping voltage, peak pulse current, and power dissipation capacity.

Parameter Comparison

Engineering Selection Recommendations

P4KE12A (Taiwan Semiconductor Corporation) serves as the primary direct equivalent, maintaining identical reverse standoff voltage, operating temperature range, power rating, and DO-204AL package configuration. This part is actively manufactured and ROHS3 compliant, providing optimal compatibility for direct replacement in existing designs.

P4KE12A-G (Comchip Technology) functions as an alternative equivalent with identical electrical specifications and package type. This part is actively produced and ROHS3 compliant. The operating temperature maximum is reduced to 150°C, which may limit suitability for applications requiring the full -55°C to 175°C range.

P6KE12A (Fairchild Semiconductor) represents a higher-performance substitute with enhanced current handling (37A peak pulse) and power dissipation (600W), while maintaining the 10.2V reverse standoff voltage. The package differs (DO-204AC/DO-15 versus DO-204AL/DO-41), requiring PCB layout verification. Operating temperature range extends to 175°C maximum. This part is actively manufactured and suitable for applications where increased transient energy absorption is beneficial.

Frequently Asked Questions (FAQ)

Q: Can P4KE12A directly replace P4KE12 without PCB modifications? A: Yes. P4KE12A maintains identical reverse standoff voltage (10.2V), operating temperature range (-55°C to 175°C), power rating (400W), and DO-204AL axial package configuration. Direct pin-for-pin substitution is supported.

Q: What is the difference between P4KE12A and P4KE12A-G? A: Both parts share identical electrical specifications (10.2V standoff, 16.7V clamping, 400W power). The primary difference is operating temperature range: P4KE12A supports -55°C to 175°C, while P4KE12A-G is rated to 150°C maximum. Selection depends on application temperature requirements.

Q: When should P6KE12A be selected over P4KE12A? A: P6KE12A provides higher transient energy absorption (600W versus 400W) and peak pulse current (37A versus 25A) while maintaining the 10.2V reverse standoff voltage. The package differs (DO-15 versus DO-41), requiring PCB footprint verification. Select P6KE12A for applications with higher transient stress or when enhanced margin is required.

Q: Are all substitutes ROHS3 compliant? A: P4KE12A and P4KE12A-G are explicitly ROHS3 compliant. P6KE12A RoHS status is not specified in available documentation.

Q: What packaging formats are available for these substitutes? A: P4KE12A is supplied in Tape & Reel (TR) format. P4KE12A-G is available in Bulk packaging. P6KE12A packaging format is not specified. Verify packaging availability with suppliers for production requirements.

Q: Do all substitutes support the same operating temperature range as the original P4KE12? A: P4KE12A and P6KE12A both support -55°C to 175°C. P4KE12A-G is limited to -55°C to 150°C maximum junction temperature. Confirm application temperature requirements before selection.