M5KP8.5AE3 Equivalent & Substitute Parts

Part Overview

The M5KP8.5AE3 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This through-hole component operates with an 8.5V reverse standoff voltage and provides 14.4V maximum clamping voltage at peak pulse current. The device is classified as Active product status and carries Military grade qualification per MIL-PRF-19500. Substitute parts are identified to address packaging format availability, compliance requirements, or inventory considerations while maintaining equivalent electrical performance within specified parameters.

Substiute Parts

M5KP8.5AE3

Microchip TechnologyIn Stock: 999M5KP8.5AE3 Datasheet

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5KP8.5A

LittelfuseIn Stock: 3001105KP8.5A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the M5KP8.5AE3 are identified based on electrical parameter equivalence within the following criteria:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 8.5V
• Voltage - Clamping (Max) @ Ipp: 14.4V
• Power - Peak Pulse: 5000W
• Type: Zener, Unidirectional
• Mounting Type: Through Hole
• Applications: General Purpose

The 5KP8.5A from Littelfuse meets these electrical specifications while operating within compatible temperature and current ranges. Substitution is valid when the reverse standoff voltage, clamping voltage, and peak pulse power remain within the specified tolerances, and the device maintains unidirectional operation in a through-hole configuration.

Parameter Comparison

Engineering Selection Recommendations

M5KP8.5AE3 (Microchip Technology) is the primary specification. This device carries Military grade qualification per MIL-PRF-19500 and is supplied in bulk packaging format. The DO-204AR package provides standard axial through-hole configuration. RoHS non-compliance status reflects the Military qualification requirement.

5KP8.5A (Littelfuse) serves as an electrical equivalent substitute with the following distinctions:

• Electrical parameters are equivalent across all critical voltage and power specifications
• Peak pulse current rating is slightly higher (354.2A vs. 347A), providing additional margin
• Operating temperature range extends to 175°C maximum, exceeding the primary part's 150°C limit
• ROHS3 compliance status applies when regulatory requirements mandate RoHS adherence
• Tape & Reel packaging format suits automated assembly processes
• P600 package maintains axial through-hole compatibility with standard PCB layouts

Selection between these parts depends on compliance requirements, packaging format needs, and inventory availability. Both devices are Active status products suitable for general-purpose transient voltage suppression applications.

Frequently Asked Questions (FAQ)

Q: Can the 5KP8.5A replace the M5KP8.5AE3 in existing designs?

A: Yes, the 5KP8.5A provides electrical equivalence across all critical parameters: 8.5V reverse standoff voltage, 14.4V clamping voltage, and 5000W peak pulse power. Both devices are unidirectional Zener TVS diodes in through-hole axial configuration. Physical package dimensions differ (DO-204AR vs. P600), but both fit standard through-hole PCB layouts. Verify PCB footprint compatibility before implementation.

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

A: Both are axial through-hole packages for through-hole mounting. DO-204AR is the Microchip package designation, while P600 is the Littelfuse package designation. Physical dimensions and lead spacing may differ. Consult manufacturer datasheets for precise dimensional specifications to confirm PCB footprint compatibility.

Q: Does the higher peak pulse current of the 5KP8.5A (354.2A vs. 347A) affect circuit design?

A: No. The higher current rating of the 5KP8.5A provides additional design margin without requiring circuit modifications. The device operates within the same voltage specifications and power dissipation limits. This characteristic makes the 5KP8.5A suitable for applications requiring enhanced transient current handling capability.

Q: Why does the 5KP8.5A have a wider operating temperature range?

A: The 5KP8.5A operates from -55°C to 175°C, compared to the M5KP8.5AE3 range of -65°C to 150°C. The 5KP8.5A provides extended high-temperature operation to 175°C. For applications requiring operation below -55°C, the M5KP8.5AE3 is required. For applications requiring operation above 150°C, the 5KP8.5A is required.

Q: What is the significance of RoHS compliance differences?

A: The M5KP8.5AE3 is RoHS non-compliant due to Military grade qualification per MIL-PRF-19500. The 5KP8.5A is ROHS3 compliant. Selection depends on regulatory requirements: Military applications typically require the M5KP8.5AE3; commercial applications with RoHS mandates require the 5KP8.5A.

Q: Are bulk and Tape & Reel packaging formats interchangeable?

A: Bulk and Tape & Reel formats serve different manufacturing processes. Bulk packaging suits manual assembly and low-volume production. Tape & Reel format is optimized for automated pick-and-place assembly. Component electrical performance is identical; packaging format selection depends on assembly process requirements and inventory management practices.

Q: Can I use the 5KP8.5A in a Military-qualified design requiring MIL-PRF-19500 compliance?

A: No. The 5KP8.5A does not carry MIL-PRF-19500 qualification. Designs requiring Military grade qualification must use the M5KP8.5AE3. The 5KP8.5A is suitable for commercial and industrial applications without Military qualification requirements.