MP4KE36AE3 Equivalent & Substitute Parts

Part Overview

The MP4KE36AE3 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose transient protection applications. This through-hole component operates with a reverse standoff voltage of 30.8V and provides clamping at 49.9V with peak pulse current handling of 8A. The device is classified as Active product status and carries Military grade qualification under MIL-PRF-19500. Substitute parts are identified to address packaging availability, compliance requirements, or inventory considerations while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	30.8	V
Voltage - Breakdown (Min)	34.2	V
Voltage - Clamping (Max) @ Ipp	49.9	V
Current - Peak Pulse (10/1000µs)	8	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 MP4KE36AE3 is determined by equivalence in the following critical parameters:

Voltage Rating: Reverse standoff voltage of 30.8V, breakdown minimum of 34.2V, and clamping voltage of 49.9V must remain constant
Current Handling: Peak pulse current of 8A or greater
Power Dissipation: Peak pulse power rating of 400W or greater
Package Type: DO-204AL (DO-41) axial through-hole configuration
Unidirectional Channel Configuration: Single channel Zener TVS diode
Operating Temperature: Functional range must encompass the application requirements

The substitute part P4KE36A meets these criteria with identical voltage specifications and equivalent current handling (8.4A), while offering extended operating temperature range and improved RoHS compliance status.

Parameter Comparison

Parameter	MP4KE36AE3 (Microchip)	P4KE36A (Taiwan Semiconductor)	Match Status
Voltage - Reverse Standoff (Typ)	30.8V	30.8V	Equivalent
Voltage - Breakdown (Min)	34.2V	34.2V	Equivalent
Voltage - Clamping (Max) @ Ipp	49.9V	49.9V	Equivalent
Current - Peak Pulse (10/1000µs)	8A	8.4A	Compatible (Higher)
Power - Peak Pulse	400W	400W	Equivalent
Operating Temperature Range	-65°C to 150°C	-55°C to 175°C	Compatible (Extended)
Package / Case	DO-204AL (DO-41)	DO-204AL (DO-41)	Equivalent
Type	Zener, Unidirectional	Zener, Unidirectional	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
RoHS Status	Non-compliant	ROHS3 Compliant	Improved

Engineering Selection Recommendations

MP4KE36AE3 (Microchip Technology)

Select this part when Military grade qualification under MIL-PRF-19500 is a mandatory requirement. This device is appropriate for applications requiring formal military certification or defense-sector compliance. The part maintains Active product status with established supply through Microchip Technology channels.

P4KE36A (Taiwan Semiconductor Corporation)

Select this part when RoHS3 compliance is required for the end application. The P4KE36A provides identical electrical performance with extended operating temperature range (-55°C to 175°C versus -65°C to 150°C) and higher peak pulse current capability (8.4A versus 8A). This substitute is suitable for commercial and industrial applications where environmental compliance standards supersede military qualification requirements. Tape & Reel packaging offers advantages for automated assembly processes.

Both parts are Active status products with equivalent voltage and power specifications, ensuring direct functional substitution within the specified electrical parameters.

Frequently Asked Questions (FAQ)

Q: Can P4KE36A replace MP4KE36AE3 in all applications?

A: P4KE36A is electrically equivalent for voltage and power specifications. Substitution is valid when Military grade MIL-PRF-19500 qualification is not a contractual or regulatory requirement. The substitute offers superior RoHS compliance and extended temperature range, making it suitable for commercial and industrial applications.

Q: What is the difference in peak pulse current between these parts?

A: MP4KE36AE3 is rated at 8A peak pulse current, while P4KE36A is rated at 8.4A. Both meet the 400W peak pulse power requirement. The higher current rating of P4KE36A provides additional margin in transient protection applications.

Q: Are the packages physically identical?

A: Yes. Both parts use DO-204AL (DO-41) axial through-hole packaging. Physical dimensions and lead spacing are equivalent, allowing direct board-level substitution without layout modifications.

Q: What is the significance of the operating temperature range difference?

A: MP4KE36AE3 operates from -65°C to 150°C (TJ), while P4KE36A operates from -55°C to 175°C (TJ). For applications operating within -55°C to 150°C, both parts are functionally equivalent. Applications requiring operation below -55°C or above 150°C must use MP4KE36AE3.

Q: Why does RoHS compliance differ between these parts?

A: MP4KE36AE3 is RoHS non-compliant due to Military grade qualification requirements, which may permit certain restricted substances under MIL-PRF-19500. P4KE36A is ROHS3 compliant, meeting current environmental regulations for commercial and industrial markets.

Q: Can these parts be used interchangeably in automated assembly?

A: MP4KE36AE3 is supplied in Bulk packaging, while P4KE36A is supplied in Tape & Reel format. P4KE36A is optimized for automated pick-and-place assembly. MP4KE36AE3 requires manual handling or custom feeding systems. Electrical performance is equivalent; packaging format determines assembly process compatibility.

Q: What voltage specifications must remain constant for substitution?

A: The reverse standoff voltage (30.8V), breakdown voltage minimum (34.2V), and clamping voltage (49.9V) must remain constant. Both listed parts maintain these specifications exactly, ensuring equivalent transient suppression performance.

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