M15KP45AE3 Equivalent & Substitute Parts

Part Overview

The M15KP45AE3 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 with a 45V reverse standoff voltage and provides 73V maximum clamping voltage at peak pulse current. The device is classified as Active product status and carries Military grade qualification under MIL-PRF-19500.

Substitute parts are identified when equivalent electrical performance parameters and mechanical compatibility are maintained within the allowed specifications for this TVS diode category. Alternatives must match critical parameters including reverse standoff voltage, clamping voltage range, peak pulse current capability, and through-hole axial package configuration.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	45	V
Voltage - Breakdown (Min)	50	V
Voltage - Clamping (Max) @ Ipp	73	V
Current - Peak Pulse (10/1000µs)	205	A
Power - Peak Pulse	15000	W
Type	Zener	-
Unidirectional Channels	1	-
Mounting Type	Through Hole	-
Package / Case	DO-204AR, Axial	-
Operating Temperature Range	-65 to 150	°C

Substitute Part Grouping Explanation

Substitute parts for the M15KP45AE3 are qualified based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Reverse standoff voltage: 45V nominal
Breakdown voltage minimum: 50V or greater
Clamping voltage maximum: within 73V specification
Peak pulse current: 205A or greater at 10/1000µs pulse width
Peak pulse power: 15000W (15kW) capability
Zener type, unidirectional configuration

Mechanical Compatibility Criteria:

Through-hole axial package configuration
DO-204AR or equivalent axial package footprint

The 15KPA45A from MDE Semiconductor Inc meets these substitution criteria with equivalent electrical performance and compatible through-hole axial packaging.

Parameter Comparison

Parameter	M15KP45AE3 (Microchip)	15KPA45A (MDE Semiconductor)	Unit
Voltage - Reverse Standoff (Typ)	45	45	V
Voltage - Breakdown (Min)	50	50.3	V
Voltage - Clamping (Max) @ Ipp	73	72.8	V
Current - Peak Pulse (10/1000µs)	205	207.4	A
Power - Peak Pulse	15000	15000	W
Type	Zener	Zener	-
Unidirectional Channels	1	1	-
Mounting Type	Through Hole	Through Hole	-
Package / Case	DO-204AR, Axial	P600, Axial	-
Operating Temperature Range	-65 to 150	-55 to 175	°C
Product Status	Active	Active	-

Engineering Selection Recommendations

M15KP45AE3 (Microchip Technology):

Military grade qualification under MIL-PRF-19500
RoHS non-compliant
Operating temperature range: -65°C to 150°C
DO-204AR package configuration
Suitable for applications requiring military-grade certification

15KPA45A (MDE Semiconductor Inc):

RoHS3 compliant
Operating temperature range: -55°C to 175°C (extended upper temperature limit)
P600 axial package configuration
Suitable for applications requiring RoHS compliance
Higher inventory availability (2080 pcs vs 779 pcs)

Selection between these parts depends on specific application requirements regarding regulatory compliance (military qualification vs. RoHS compliance) and operating temperature range. Both parts deliver equivalent electrical performance for general-purpose TVS diode applications.

Frequently Asked Questions (FAQ)

Q: Can the 15KPA45A directly replace the M15KP45AE3 in existing designs?

A: The 15KPA45A provides equivalent electrical performance with matching reverse standoff voltage (45V), clamping voltage (72.8V vs 73V), and peak pulse current (207.4A vs 205A). Both are through-hole axial packages. Physical footprint compatibility depends on specific PCB layout; the DO-204AR and P600 packages are both standard axial configurations but may have minor dimensional differences requiring verification against component datasheets.

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

A: The primary differences are: (1) Manufacturer and part number series; (2) RoHS compliance status (M15KP45AE3 is non-compliant, 15KPA45A is RoHS3 compliant); (3) Military qualification (M15KP45AE3 carries MIL-PRF-19500, 15KPA45A does not); (4) Operating temperature range (M15KP45AE3: -65°C to 150°C, 15KPA45A: -55°C to 175°C); (5) Package designation (DO-204AR vs P600).

Q: Are the electrical specifications identical?

A: The electrical specifications are equivalent within normal manufacturing tolerances. Reverse standoff voltage is identical at 45V. Breakdown voltage, clamping voltage, and peak pulse current are within 1% variation. Peak pulse power is identical at 15000W.

Q: Which part should be selected for new designs?

A: Selection criteria: Choose M15KP45AE3 if military-grade qualification is required. Choose 15KPA45A if RoHS compliance is mandatory or if the extended operating temperature range (-55°C to 175°C) is beneficial. Both parts are Active status and suitable for general-purpose TVS applications.

Q: Are there any package compatibility concerns?

A: Both parts use through-hole axial package configurations (DO-204AR and P600). Standard axial packages are mechanically compatible for most PCB layouts. Confirm specific lead spacing and body dimensions against component datasheets if tight PCB constraints exist.

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