MP6KE91AE3 Equivalent & Substitute Parts

Part Overview

The MP6KE91AE3 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This component features a 77.8V reverse standoff voltage with a 125V maximum clamping voltage and 4.8A peak pulse current capability in a through-hole T-18 axial package. The device is qualified to MIL-PRF-19500 military standards and maintains an active product status with 1,037 units currently in stock.

The P6KE91A represents the primary equivalent substitute, offering identical electrical performance characteristics while utilizing a different package form factor (DO-15). This substitute relationship becomes relevant when the original T-18 package is unavailable or when design specifications permit package variation without compromising circuit functionality.

Substiute Parts

MP6KE91AE3

Microchip TechnologyIn Stock: 1064MP6KE91AE3 Datasheet

Current PartRFQ

P6KE91A

Fairchild SemiconductorIn Stock: 32302P6KE91A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MP6KE91AE3 with the P6KE91A is permissible based on the following electrical and mechanical equivalence criteria:

Electrical Equivalence:

• Identical reverse standoff voltage: 77.8V
• Identical breakdown voltage minimum: 86.5V
• Identical maximum clamping voltage: 125V
• Identical peak pulse current: 4.8A
• Identical peak pulse power: 600W
• Identical device type: Unidirectional Zener
• Identical operating temperature range: -65°C to 150°C

Mechanical Compatibility:

• Both devices utilize through-hole axial mounting technology
• Package form factors differ (T-18 versus DO-15) but both are standard axial configurations compatible with printed circuit board layouts designed for through-hole component insertion

The P6KE91A qualifies as a direct electrical substitute when circuit board layout and mechanical constraints permit the use of a DO-15 package in place of the T-18 package.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: MP6KE91AE3

The MP6KE91AE3 maintains active product status with established supply availability (1,037 units in stock). This component carries MIL-PRF-19500 military qualification, suitable for applications requiring military-grade component certification. The T-18 package provides standard through-hole mounting compatibility for legacy and new designs utilizing axial component footprints.

Alternative Selection: P6KE91A

The P6KE91A presents an electrical equivalent with identical performance parameters across all critical voltage and current specifications. However, this component carries an obsolete product status, indicating discontinued manufacturing and limited long-term availability. The P6KE91A achieves ROHS3 compliance, whereas the MP6KE91AE3 is RoHS non-compliant. Selection of the P6KE91A is appropriate only when existing inventory is available and when RoHS compliance is not a design requirement. The DO-15 package requires circuit board layout modification compared to the T-18 footprint.

For new designs and applications requiring sustained component availability, the MP6KE91AE3 is the appropriate selection. For legacy system maintenance where existing P6KE91A inventory exists and package compatibility is confirmed, the substitute remains electrically valid.

Frequently Asked Questions (FAQ)

Q: Can the P6KE91A directly replace the MP6KE91AE3 in an existing circuit?

A: Electrical substitution is valid based on identical voltage and current parameters. Physical substitution requires verification that the circuit board layout accommodates the DO-15 package in place of the T-18 package. Both packages utilize through-hole axial mounting, but footprint dimensions differ.

Q: What is the significance of the product status difference between these parts?

A: The MP6KE91AE3 maintains active status with ongoing manufacturing and supply availability. The P6KE91A is obsolete, indicating discontinued production. Active status ensures long-term component availability for production and field replacement applications.

Q: Are there compliance differences between these substitutes?

A: The MP6KE91AE3 is RoHS non-compliant, while the P6KE91A achieves ROHS3 compliance. Applications subject to RoHS regulatory requirements must use the P6KE91A or identify alternative compliant components. The MP6KE91AE3 is suitable for applications without RoHS compliance mandates.

Q: What military qualifications apply to these components?

A: The MP6KE91AE3 carries MIL-PRF-19500 qualification. The P6KE91A qualification status is not specified in the provided data. Applications requiring military-grade component certification should specify the MP6KE91AE3.

Q: How do the package differences affect circuit board design?

A: The T-18 package (MP6KE91AE3) and DO-15 package (P6KE91A) both utilize through-hole axial mounting but have different physical dimensions. Circuit board layouts must be verified to confirm mechanical compatibility before substitution. Existing T-18 footprints may require modification to accommodate DO-15 components.

Q: Are the electrical performance characteristics identical between these parts?

A: Yes. Both components provide identical reverse standoff voltage (77.8V), breakdown voltage (86.5V minimum), clamping voltage (125V maximum), peak pulse current (4.8A), and peak pulse power (600W). Electrical performance in overvoltage protection applications is equivalent.