MP4KE82AE3 Equivalent & Substitute Parts

Part Overview

The MP4KE82AE3 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This through-hole component operates across a wide temperature range (-65°C to 150°C) and carries military-grade qualification under MIL-PRF-19500. The part is currently active in production with 719 units in stock.

Identifying equivalent and substitute parts becomes necessary when addressing supply chain constraints, lead time requirements, or when design specifications permit alternative manufacturers while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	70.1	V
Voltage - Breakdown (Min)	77.9	V
Voltage - Clamping (Max) @ Ipp	113	V
Current - Peak Pulse (10/1000µs)	3.5	A
Power - Peak Pulse	400	W
Operating Temperature Range	-65 to 150	°C (TJ)
Package / Case	DO-204AL (DO-41)	Axial Through Hole
Type	Zener	Unidirectional

Substitute Part Grouping Explanation

Substitution of the MP4KE82AE3 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

Voltage - Reverse Standoff (Typ): 70.1V
Voltage - Breakdown (Min): 77.9V
Voltage - Clamping (Max) @ Ipp: 113V
Package / Case: DO-204AL (DO-41) axial through-hole configuration
Unidirectional Zener diode topology

Mechanical Compatibility:

Through-hole mounting type
DO-204AL (DO-41) package footprint

Operational Compatibility:

Peak pulse current rating of 3.5A or greater
Peak pulse power rating of 400W or greater
Operating temperature range that encompasses or exceeds the application requirements

The P4KE82A from Taiwan Semiconductor Corporation meets all electrical and mechanical substitution criteria, with identical voltage specifications and package configuration. Peak pulse current is rated at 3.7A, exceeding the 3.5A requirement. Operating temperature range extends to 175°C, providing broader thermal coverage than the original part.

Parameter Comparison

Parameter	MP4KE82AE3 (Microchip)	P4KE82A (Taiwan Semiconductor)	Match Status
Voltage - Reverse Standoff (Typ)	70.1V	70.1V	Equivalent
Voltage - Breakdown (Min)	77.9V	77.9V	Equivalent
Voltage - Clamping (Max) @ Ipp	113V	113V	Equivalent
Current - Peak Pulse (10/1000µs)	3.5A	3.7A	Compatible (Higher Rating)
Power - Peak Pulse	400W	400W	Equivalent
Operating Temperature Range	-65°C to 150°C	-55°C to 175°C	Compatible (Extended Range)
Package / Case	DO-204AL (DO-41)	DO-204AL (DO-41)	Equivalent
Type	Zener, Unidirectional	Zener, Unidirectional	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent

Engineering Selection Recommendations

MP4KE82AE3 (Microchip Technology):

Select this part when military-grade qualification under MIL-PRF-19500 is a contractual or design requirement
Appropriate for applications requiring formal military specification compliance
RoHS non-compliant status requires verification against end-product regulatory requirements
Current inventory: 719 units

P4KE82A (Taiwan Semiconductor Corporation):

Select this part when RoHS3 compliance is required for end-product certification
Suitable for commercial and industrial applications where military qualification is not mandated
Peak pulse current rating of 3.7A provides additional margin over the 3.5A requirement
Extended operating temperature range (-55°C to 175°C) accommodates broader thermal environments
Current inventory: 6200 units, supporting higher-volume procurement requirements

Both parts share identical electrical specifications for voltage parameters and package configuration, ensuring direct functional substitution within the specified operating conditions.

Frequently Asked Questions (FAQ)

Q: Can P4KE82A be used as a direct replacement for MP4KE82AE3 in all applications?

A: P4KE82A is electrically and mechanically compatible with MP4KE82AE3 for applications where military-grade qualification is not required. Both parts feature identical voltage specifications (70.1V standoff, 113V clamping) and the same DO-204AL package. The primary difference is certification status: MP4KE82AE3 carries MIL-PRF-19500 qualification, while P4KE82A is RoHS3 compliant. Selection depends on regulatory and contractual requirements.

Q: What is the significance of the different peak pulse current ratings (3.5A vs 3.7A)?

A: The P4KE82A rating of 3.7A exceeds the MP4KE82AE3 rating of 3.5A. This represents a higher current-handling capability and provides additional design margin. Both parts meet or exceed the 3.5A requirement, making P4KE82A suitable for applications designed around the original specification.

Q: Are there temperature range considerations when substituting these parts?

A: The MP4KE82AE3 operates from -65°C to 150°C, while P4KE82A operates from -55°C to 175°C. For applications operating below -55°C, the MP4KE82AE3 is required. For applications exceeding 150°C, the P4KE82A provides extended thermal coverage. Both parts are suitable for standard industrial temperature ranges (-40°C to 85°C).

Q: Does the RoHS compliance difference affect electrical performance?

A: No. RoHS compliance status reflects manufacturing process and material composition restrictions, not electrical performance. Both parts deliver identical voltage specifications and clamping characteristics. RoHS compliance is a regulatory and supply-chain consideration, not a functional parameter.

Q: Can these parts be used interchangeably on the same PCB without layout modifications?

A: Yes. Both parts use the DO-204AL (DO-41) axial through-hole package with identical pin spacing and footprint. No PCB layout changes are required for substitution.

Q: What inventory considerations apply to these parts?

A: MP4KE82AE3 has 719 units in stock, while P4KE82A has 6200 units available. For high-volume production or extended lead-time mitigation, P4KE82A offers significantly greater inventory availability.

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