M5KP11AE3 Equivalent & Substitute Parts

Part Overview

The M5KP11AE3 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 11V reverse standoff voltage and provides 18.2V clamping at peak pulse current, delivering 5000W peak pulse power dissipation. The device is classified as military-grade and qualified to MIL-PRF-19500 standards. Substitute parts are identified to address packaging availability, compliance requirements, or inventory considerations while maintaining equivalent electrical performance within specified operating parameters.

Substiute Parts

M5KP11AE3

Microchip TechnologyIn Stock: 1155M5KP11AE3 Datasheet

Current PartRFQ

5KP11A

Littelfuse Inc.In Stock: 37495KP11A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the M5KP11AE3 is determined by equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - Reverse Standoff (Typ): 11V
• Voltage - Breakdown (Min): 12.2V
• Voltage - Clamping (Max) @ Ipp: 18.2V
• Current - Peak Pulse (10/1000µs): ≥274A
• Power - Peak Pulse: 5000W
• Unidirectional Channels: 1
• Type: Zener

Mechanical Equivalence Criteria:

• Mounting Type: Through Hole
• Package / Case: Axial configuration
• Operating Temperature Range: Minimum -55°C to 150°C

The substitute part 5KP11A meets all electrical parameters with peak pulse current of 280.2A, exceeding the minimum requirement. Both parts share identical voltage ratings and power dissipation specifications. Mechanical compatibility is confirmed through axial through-hole mounting in equivalent package classes (DO-204AR and P600).

Parameter Comparison

Engineering Selection Recommendations

M5KP11AE3 (Microchip Technology):

• Military-grade qualification per MIL-PRF-19500
• RoHS non-compliant status
• Operating temperature range: -65°C to 150°C
• Bulk packaging
• Suitable for applications requiring military specification compliance

5KP11A (Littelfuse Inc.):

• ROHS3 compliant
• Extended operating temperature range: -55°C to 175°C
• Cut Tape (CT) packaging
• Suitable for applications requiring RoHS compliance and higher temperature operation
• Peak pulse current specification (280.2A) provides margin above M5KP11AE3 requirement (274A)

Selection between these parts depends on compliance requirements and environmental operating conditions. The M5KP11AE3 is specified for military applications, while the 5KP11A accommodates RoHS-compliant designs with extended temperature capability.

Frequently Asked Questions (FAQ)

Q: Can the 5KP11A directly replace the M5KP11AE3 in all applications?

A: The 5KP11A meets all critical electrical parameters (voltage ratings, clamping voltage, and power dissipation). Both devices are through-hole axial components with identical unidirectional zener characteristics. Substitution is valid from an electrical standpoint. However, military specification compliance (MIL-PRF-19500) is specific to the M5KP11AE3; applications requiring military qualification must use the original part.

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

A: Both DO-204AR and P600 are axial through-hole package designations for TVS diodes. They are mechanically compatible for board-level mounting and represent equivalent package classes from different manufacturers. Physical dimensions and lead spacing are compatible for standard through-hole PCB applications.

Q: Does the 5KP11A's higher peak pulse current (280.2A vs. 274A) affect circuit design?

A: No. The substitute part's higher peak pulse current specification indicates greater current-handling capability, which provides additional margin. This does not require circuit redesign and is compatible with the original design intent.

Q: Are there temperature range implications when substituting?

A: The M5KP11AE3 operates from -65°C to 150°C, while the 5KP11A operates from -55°C to 175°C. The substitute part has a narrower lower temperature limit (-55°C vs. -65°C) but extends the upper limit. Applications operating below -55°C require the M5KP11AE3. Applications operating above 150°C benefit from the 5KP11A's extended range.

Q: What is the significance of RoHS compliance difference?

A: The M5KP11AE3 is RoHS non-compliant, while the 5KP11A is ROHS3 compliant. RoHS compliance is required for products sold into regulated markets (EU and equivalent jurisdictions). Design requirements for RoHS compliance mandate use of the 5KP11A.

Q: Are both parts available in equivalent quantities?

A: Inventory levels differ. The M5KP11AE3 has 1129 pieces in stock (Bulk packaging), while the 5KP11A has 3700 pieces in stock (Cut Tape packaging). Availability should be confirmed based on project lead time and volume requirements.