MP4KE9.1AE3 Equivalent & Substitute Parts

Part Overview

The MP4KE9.1AE3 is a unidirectional Zener-type Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology. This component is designed for general-purpose transient voltage suppression applications and operates across a temperature range of -65°C to 150°C. The device features a 7.78V reverse standoff voltage with a 13.4V maximum clamping voltage and is rated for 30A peak pulse current. The part is currently in active production status with 823 units available in bulk packaging. The MP4KE9.1AE3 is qualified to MIL-PRF-19500 military standards and is RoHS non-compliant. Equivalent and substitute parts are identified to provide alternative sourcing options for applications requiring identical or compatible electrical and mechanical specifications.

Substiute Parts

MP4KE9.1AE3

Microchip TechnologyIn Stock: 913MP4KE9.1AE3 Datasheet

Current PartRFQ

P4KE9.1A

Taiwan Semiconductor CorporationIn Stock: 863P4KE9.1A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MP4KE9.1AE3 is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - Reverse Standoff (Typ): 7.78V
• Voltage - Breakdown (Min): 8.65V
• Voltage - Clamping (Max) @ Ipp: 13.4V
• Current - Peak Pulse (10/1000µs): 30A minimum
• Power - Peak Pulse: 400W minimum
• Type: Zener, Unidirectional
• Unidirectional Channels: 1

Mechanical Equivalence Criteria:

• Package / Case: DO-204AL (DO-41) Axial Through Hole
• Mounting Type: Through Hole

The substitute part P4KE9.1A meets all electrical parameters with equivalent or superior ratings and maintains identical mechanical compatibility. Both parts share the same base product number (P4KE9.1) and operate within compatible temperature ranges suitable for general-purpose transient voltage suppression applications.

Parameter Comparison

Engineering Selection Recommendations

MP4KE9.1AE3 (Microchip Technology): Select this part when military-grade qualification to MIL-PRF-19500 is a mandatory requirement. This device is appropriate for applications requiring military specification compliance and operates across the full military temperature range of -65°C to 150°C. The part is available in bulk packaging format. RoHS non-compliance must be acceptable for the application.

P4KE9.1A (Taiwan Semiconductor Corporation): Select this substitute part when RoHS3 compliance is required and military qualification is not a specification requirement. The P4KE9.1A provides equivalent electrical performance with a superior peak pulse current rating of 31A and an extended operating temperature range of -55°C to 175°C. This part is available in Tape & Reel packaging format, suitable for automated assembly processes. Both parts maintain identical mechanical compatibility with DO-204AL (DO-41) through-hole mounting.

Frequently Asked Questions (FAQ)

Q: Can P4KE9.1A be used as a direct replacement for MP4KE9.1AE3 in all applications?

A: P4KE9.1A is electrically and mechanically compatible with MP4KE9.1AE3 for general-purpose transient voltage suppression applications. Both devices share identical reverse standoff voltage (7.78V), breakdown voltage (8.65V), and clamping voltage (13.4V) specifications. The substitute part offers superior peak pulse current (31A vs. 30A) and extended temperature range (-55°C to 175°C vs. -65°C to 150°C). However, if military qualification to MIL-PRF-19500 is a mandatory requirement, MP4KE9.1AE3 must be used. If RoHS3 compliance is required, P4KE9.1A must be used.

Q: What are the key differences between these two parts?

A: The primary differences are: (1) Manufacturer—Microchip Technology vs. Taiwan Semiconductor Corporation; (2) RoHS Status—MP4KE9.1AE3 is non-compliant while P4KE9.1A is ROHS3 compliant; (3) Military Qualification—MP4KE9.1AE3 is qualified to MIL-PRF-19500 while P4KE9.1A is not; (4) Operating Temperature Range—MP4KE9.1AE3 operates -65°C to 150°C while P4KE9.1A operates -55°C to 175°C; (5) Packaging Format—MP4KE9.1AE3 is supplied in bulk while P4KE9.1A is supplied in Tape & Reel format; (6) Peak Pulse Current—MP4KE9.1AE3 is rated 30A while P4KE9.1A is rated 31A.

Q: Are the DO-204AL and DO-41 packages identical?

A: DO-204AL and DO-41 are equivalent designations for the same axial through-hole package. Both MP4KE9.1AE3 and P4KE9.1A use this identical package format, ensuring mechanical compatibility in PCB layouts and through-hole mounting applications.

Q: What does the base product number P4KE9.1 indicate?

A: The base product number P4KE9.1 identifies the core electrical specification family for this TVS diode series. Both MP4KE9.1AE3 and P4KE9.1A share this base designation, indicating they belong to the same electrical specification class with 7.78V reverse standoff voltage and 13.4V clamping voltage characteristics.

Q: Which part should be selected for high-temperature applications?

A: P4KE9.1A is suitable for applications requiring operation up to 175°C junction temperature. MP4KE9.1AE3 is limited to 150°C junction temperature. For applications operating above 150°C, P4KE9.1A is the appropriate selection.

Q: Is the 1A difference in peak pulse current rating significant?

A: The P4KE9.1A rating of 31A provides a 3.3% margin above the MP4KE9.1AE3 rating of 30A. Both parts are rated for 400W peak pulse power. For applications designed to the 30A specification, both parts are suitable. The additional 1A capacity in P4KE9.1A provides additional design margin.

Q: What is the significance of the packaging format difference (Bulk vs. Tape & Reel)?

A: Bulk packaging (MP4KE9.1AE3) is suitable for manual assembly, prototyping, and low-volume production. Tape & Reel packaging (P4KE9.1A) is optimized for automated pick-and-place assembly processes and high-volume manufacturing. The electrical and mechanical specifications remain identical; packaging format selection depends on assembly methodology and production volume requirements.