MP6KE43AE3 Equivalent & Substitute Parts

Part Overview

The MP6KE43AE3 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This through-hole component features a 36.8V reverse standoff voltage with a 59.3V maximum clamping voltage and 10.1A peak pulse current capability. The device is classified as military-grade and qualified to MIL-PRF-19500 standards.

Substitute parts are identified when equivalent electrical performance parameters are maintained across voltage ratings, current handling, power dissipation, and thermal operating ranges, while accommodating different package configurations and manufacturer specifications.

Substiute Parts

MP6KE43AE3

Microchip TechnologyIn Stock: 777MP6KE43AE3 Datasheet

Current PartRFQ

P6KE43A

Diotec SemiconductorIn Stock: 10406P6KE43A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP6KE43AE3 is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Electrical Parameters:

• Voltage - Reverse Standoff (Typ): 36.8V
• Voltage - Breakdown (Min): 40.9V
• Voltage - Clamping (Max) @ Ipp: 59.3V
• Current - Peak Pulse (10/1000µs): minimum 10.1A
• Power - Peak Pulse: 600W
• Type: Zener, Unidirectional

Mechanical Parameters:

• Mounting Type: Through Hole
• Package Category: Axial configuration (T-18 or DO-15 acceptable)

Functional Parameters:

• Applications: General Purpose
• Unidirectional Channels: 1

The P6KE43A from Diotec Semiconductor meets these substitution criteria with equivalent voltage and power ratings, slightly higher peak pulse current (10.6A), and compatible through-hole axial packaging in DO-15 (DO-204AC) configuration.

Parameter Comparison

Engineering Selection Recommendations

MP6KE43AE3 (Microchip Technology):

• Active product status with military-grade qualification (MIL-PRF-19500)
• RoHS non-compliant; REACH Unaffected
• Moisture Sensitivity Level 1 (Unlimited)
• Recommended for applications requiring military specification compliance and established supply chain with 704 units in stock

P6KE43A (Diotec Semiconductor):

• Active product status with ROHS3 compliance
• Extended operating temperature range (-50°C to 175°C) provides thermal margin beyond the primary part
• Peak pulse current specification (10.6A) exceeds minimum requirement
• Significantly higher inventory availability (10,300 units in stock)
• Suitable for applications where RoHS3 compliance is required and military qualification is not mandated

Both parts maintain electrical equivalence across all critical voltage and power parameters. Package configuration differs (T-18 versus DO-15), but both employ through-hole axial mounting compatible with standard PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the P6KE43A directly replace the MP6KE43AE3 in existing designs?

A: Electrical substitution is valid when circuit board layout accommodates the DO-15 (DO-204AC) package footprint instead of T-18. Both are through-hole axial components with identical voltage and power ratings. Physical lead spacing and hole diameter specifications must be verified against PCB design files.

Q: What is the significance of the different operating temperature ranges?

A: The MP6KE43AE3 operates from -65°C to 150°C (TJ), while the P6KE43A operates from -50°C to 175°C (TJ). The P6KE43A provides extended high-temperature capability. For applications operating below -50°C, the MP6KE43AE3 is required. For applications exceeding 150°C, the P6KE43A is required.

Q: Why does the P6KE43A have higher peak pulse current (10.6A vs 10.1A)?

A: This represents a design variation between manufacturers. The P6KE43A exceeds the minimum current requirement, providing additional margin. Both parts maintain the same 600W peak pulse power rating and 59.3V clamping voltage.

Q: Are there compliance differences between these parts?

A: The MP6KE43AE3 is military-grade (MIL-PRF-19500) and RoHS non-compliant. The P6KE43A is ROHS3 compliant. Selection depends on regulatory requirements: military applications require the MP6KE43AE3; applications subject to RoHS3 regulations require the P6KE43A.

Q: How do package differences affect circuit board design?

A: T-18 and DO-15 are both through-hole axial packages with different physical dimensions. PCB footprints are not interchangeable without layout modification. Hole spacing, lead diameter, and component body length differ. Design files must be updated to accommodate the selected package.

Q: What inventory considerations apply to these substitutes?

A: The MP6KE43AE3 has 704 units in stock; the P6KE43A has 10,300 units in stock. For high-volume production or extended lead time mitigation, the P6KE43A offers superior availability.