P4KE91A-G Equivalent & Substitute Parts

Part Overview

The P4KE91A-G is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Comchip Technology, designed for general-purpose transient voltage protection applications. This through-hole component operates with a reverse standoff voltage of 77.8V and provides clamping at 125V with a peak pulse current rating of 3.2A. The part maintains Active product status and is RoHS3 compliant, making it suitable for modern electronic designs requiring transient suppression in the 77.8V operating range. Equivalent and substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and operational parameters that ensure functional interchangeability in circuit applications.

Substiute Parts

P4KE91A-G

Comchip TechnologyIn Stock: 801P4KE91A-G Datasheet

Current PartRFQ

P4KE91A

Taiwan Semiconductor CorporationIn Stock: 1147P4KE91A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of TVS diodes is determined by equivalence in the following critical parameters: reverse standoff voltage, breakdown voltage range, clamping voltage, peak pulse current capability, and power dissipation rating. The P4KE91A manufactured by Taiwan Semiconductor Corporation qualifies as a direct substitute for the P4KE91A-G based on matching electrical specifications across all key performance criteria. Both devices share identical voltage ratings (77.8V standoff, 86.45V minimum breakdown, 125V clamping), comparable peak pulse current ratings (3.2A vs. 3.3A), and equivalent power handling (400W). Mechanical compatibility is maintained through identical package designations (DO-204AL/DO-41 axial through-hole configuration). Both parts are Active status products with RoHS3 compliance and unlimited moisture sensitivity rating, ensuring regulatory and environmental compatibility in equivalent applications.

Parameter Comparison

Engineering Selection Recommendations

The P4KE91A manufactured by Taiwan Semiconductor Corporation is a direct functional equivalent to the P4KE91A-G. Both devices maintain Active product status with full RoHS3 compliance, ensuring regulatory alignment for current and future applications. The substitute part demonstrates superior thermal performance with an extended operating temperature range (-55 to 175°C versus -55 to 150°C), providing additional design margin in high-temperature environments. Peak pulse current capability is marginally higher (3.3A versus 3.2A), offering enhanced transient suppression capacity. Electrical parameters remain within equivalent specifications, with breakdown voltage and clamping characteristics matching design requirements. Both parts utilize identical through-hole axial packaging (DO-204AL/DO-41), ensuring mechanical interchangeability without PCB redesign. Selection between these parts should be based on availability, lead time, and cost considerations, as electrical and mechanical performance are equivalent for general-purpose transient voltage suppression applications.

Frequently Asked Questions (FAQ)

Q: What determines if a TVS diode can substitute for the P4KE91A-G?

A: Substitution requires matching reverse standoff voltage (77.8V), breakdown voltage range (minimum 86.45V), clamping voltage (125V maximum), peak pulse current capability (minimum 3.2A), and power dissipation rating (400W). Package type and mounting configuration must also be identical (DO-204AL/DO-41 through-hole axial).

Q: Is the P4KE91A from Taiwan Semiconductor a direct replacement?

A: Yes. The P4KE91A meets all electrical and mechanical requirements for direct substitution. Voltage ratings, current ratings, power handling, and package configuration are equivalent or superior to the original P4KE91A-G.

Q: Are there packaging differences between these parts?

A: Both parts use identical packaging: DO-204AL (DO-41) axial through-hole configuration. No PCB layout modifications are required for substitution.

Q: What is the difference in operating temperature range?

A: The P4KE91A-G operates from -55 to 150°C, while the P4KE91A operates from -55 to 175°C. The substitute part provides 25°C additional high-temperature margin, beneficial for applications in elevated thermal environments.

Q: Do both parts have the same compliance certifications?

A: Yes. Both the P4KE91A-G and P4KE91A are RoHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes. Moisture sensitivity level is identical (MSL 1 - Unlimited) for both parts.

Q: What is the peak pulse current difference?

A: The P4KE91A-G is rated at 3.2A peak pulse current, while the P4KE91A is rated at 3.3A. This 0.1A difference represents enhanced transient suppression capability in the substitute part.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. Electrical performance, mechanical compatibility, and regulatory compliance are equivalent, allowing direct substitution without circuit redesign or performance degradation.