MP6KE51AE3 Equivalent & Substitute Parts

Part Overview

The MP6KE51AE3 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose transient protection applications. This through-hole component operates with a reverse standoff voltage of 43.6V and provides clamping at 70.1V maximum, with a peak pulse current rating of 8.6A. The device is actively produced and qualified to MIL-PRF-19500 military standards. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring compatible TVS diode performance characteristics.

Substiute Parts

MP6KE51AE3

Microchip TechnologyIn Stock: 751MP6KE51AE3 Datasheet

Current PartRFQ

P6KE51A

Fairchild SemiconductorIn Stock: 18607P6KE51A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MP6KE51AE3 is determined by electrical and mechanical compatibility across the following critical parameters:

Voltage Parameters: The reverse standoff voltage (43.6V), breakdown voltage minimum (48.5V), and clamping voltage maximum (70.1V) define the protection threshold and response characteristics. Substitute parts must maintain these voltage specifications within the same tolerance band to ensure equivalent circuit protection.

Current and Power Ratings: Peak pulse current (8.6A) and peak pulse power (600W) establish the transient energy handling capability. Substitute parts must support these ratings to prevent device failure under specified fault conditions.

Mechanical Compatibility: Through-hole mounting type and T-18 axial package configuration are required for direct board-level substitution without redesign.

Electrical Configuration: Unidirectional topology with single channel configuration must be preserved.

The P6KE51A from Fairchild Semiconductor is identified as a substitute based on equivalent electrical performance within the P6KE51 base product family and compatible package designation.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: The MP6KE51AE3 is the specified component and remains the first choice for applications requiring MIL-PRF-19500 military qualification. This device carries active product status and maintains full military-grade certification.

Substitute Selection: The P6KE51A from Fairchild Semiconductor is qualified as an equivalent substitute when the MP6KE51AE3 is unavailable. Both devices share identical package configuration (T-18 axial through-hole), equivalent electrical performance within the P6KE51 product family, and matching export classification (EAR99). The P6KE51A maintains active product status and supports the same tariff classification.

Compliance Considerations: The MP6KE51AE3 is RoHS non-compliant and carries Moisture Sensitivity Level 1 (unlimited). Procurement decisions should account for regulatory requirements in the target application environment. Both devices are REACH Unaffected.

Inventory and Availability: Selection between these parts may be driven by supply chain availability. The MP6KE51AE3 currently maintains 664 units in stock, while the P6KE51A maintains 18,576 units in stock.

Frequently Asked Questions (FAQ)

Q: Can the P6KE51A directly replace the MP6KE51AE3 in existing designs?

A: Yes. Both devices share identical T-18 axial through-hole package configuration, equivalent electrical performance specifications, and compatible voltage/current ratings. No board redesign is required for direct substitution.

Q: What are the critical voltage parameters that must match for substitution?

A: The reverse standoff voltage (43.6V), breakdown voltage minimum (48.5V), and clamping voltage maximum (70.1V) are the primary electrical parameters that define substitution compatibility. These parameters establish the protection threshold and transient response characteristics.

Q: Are there differences in military qualification between these parts?

A: The MP6KE51AE3 carries MIL-PRF-19500 military qualification. The P6KE51A qualification status is not specified in the provided data. Applications requiring explicit military certification should verify qualification requirements with the component supplier.

Q: What is the significance of the T-18 package designation?

A: The T-18 package is a through-hole axial configuration used for direct insertion into printed circuit boards. Both the MP6KE51AE3 and P6KE51A use this identical package, ensuring mechanical and electrical compatibility without modification to board layouts or assembly processes.

Q: How do the peak pulse current and power ratings affect substitution decisions?

A: Both devices are rated for 8.6A peak pulse current and 600W peak pulse power. These ratings define the maximum transient energy the device can safely dissipate. Substitute parts must maintain these specifications to ensure equivalent protection performance under fault conditions.

Q: What is the operating temperature range for these devices?

A: The MP6KE51AE3 operates across -65°C to 150°C junction temperature. This range must be verified against application requirements to ensure the device functions within specified environmental conditions.

Q: Are there RoHS compliance differences between these parts?

A: The MP6KE51AE3 is RoHS non-compliant. RoHS compliance status for the P6KE51A is not specified in the provided data. Applications subject to RoHS regulations should verify compliance requirements with the component supplier before substitution.