M15KP85AE3 Equivalent & Substitute Parts

Part Overview

The M15KP85AE3 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 an 85V reverse standoff voltage and provides 137V maximum clamping voltage at peak pulse current. The device is qualified to MIL-PRF-19500 military standards and is currently in active production status with 1095 units available in inventory.

Substitute parts are identified when equivalent electrical performance parameters and mechanical compatibility are maintained across alternative manufacturers. This ensures design flexibility, supply chain continuity, and cost optimization without compromising circuit protection requirements.

Substiute Parts

M15KP85AE3

Microchip TechnologyIn Stock: 1142M15KP85AE3 Datasheet

Current PartRFQ

15KPA85A

MDE Semiconductor IncIn Stock: 183315KPA85A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the M15KP85AE3 is determined by strict equivalence across the following critical parameters:

Electrical Performance Criteria:

• Voltage - Reverse Standoff: 85V nominal
• Voltage - Breakdown (Min): within 94.4V to 94.9V range
• Voltage - Clamping (Max) @ Ipp: within 137V to 137.6V range
• Current - Peak Pulse (10/1000µs): within 109A to 109.7A range
• Power - Peak Pulse: 15000W (15kW)

Mechanical & Physical Criteria:

• Mounting Type: Through Hole
• Package Configuration: Axial lead format
• Unidirectional Channels: 1 channel
• Device Type: Zener TVS Diode

Application Criteria:

• General Purpose overvoltage protection
• No power line protection requirement

The substitute part 15KPA85A meets all electrical performance parameters within acceptable tolerances and maintains identical mechanical mounting and package specifications, confirming direct substitution capability.

Parameter Comparison

Engineering Selection Recommendations

M15KP85AE3 (Microchip Technology):

• Primary selection for applications requiring MIL-PRF-19500 military qualification
• Specified for designs with strict military-grade component requirements
• RoHS non-compliant status requires verification against design compliance mandates
• Operating temperature range: -65°C to 150°C

15KPA85A (MDE Semiconductor Inc):

• Direct electrical substitute with equivalent performance within specified tolerances
• ROHS3 compliant, suitable for designs with RoHS compliance requirements
• Extended operating temperature range (-55°C to 175°C) provides thermal margin for high-temperature applications
• Active production status with higher inventory availability (1739 units)
• Axial package format (P600) maintains through-hole mounting compatibility

Selection between these parts depends on compliance requirements (military qualification versus RoHS compliance) and operating temperature envelope specifications for the target application.

Frequently Asked Questions (FAQ)

Q: Can the 15KPA85A replace the M15KP85AE3 in all applications?

A: The 15KPA85A provides electrical equivalence within specified tolerances for voltage clamping, breakdown, and peak pulse current parameters. Substitution is valid for general-purpose overvoltage protection circuits. However, applications requiring MIL-PRF-19500 military qualification must retain the M15KP85AE3, as the substitute does not carry this certification.

Q: What is the difference between DO-204AR and P600 packages?

A: Both DO-204AR and P600 are axial lead through-hole packages formats for TVS diodes. The designations reflect different manufacturer package naming conventions. Both are mechanically compatible for through-hole PCB mounting and maintain identical lead spacing and orientation for circuit board layout purposes.

Q: Are there temperature range differences between these parts?

A: Yes. The M15KP85AE3 operates from -65°C to 150°C, while the 15KPA85A operates from -55°C to 175°C. The substitute part provides a wider upper temperature limit, making it suitable for high-temperature environments. For applications operating below -55°C, the M15KP85AE3 is required.

Q: What does RoHS compliance mean for component selection?

A: RoHS (Restriction of Hazardous Substances) compliance restricts the use of specific hazardous materials in electrical components. The M15KP85AE3 is RoHS non-compliant, while the 15KPA85A is ROHS3 compliant. Design specifications requiring RoHS compliance mandate use of the 15KPA85A.

Q: Are the electrical performance differences significant?

A: No. Voltage breakdown, clamping voltage, and peak pulse current differences between the two parts fall within normal manufacturing tolerances for TVS diodes. Both parts deliver equivalent circuit protection performance for the specified 85V standoff voltage class.

Q: Can I use either part interchangeably in my design?

A: Interchangeability depends on your design requirements. If military qualification (MIL-PRF-19500) is mandatory, use the M15KP85AE3. If RoHS compliance is required, use the 15KPA85A. For general-purpose applications without these specific certifications, either part is electrically and mechanically compatible.