MP4KE170AE3 Equivalent & Substitute Parts

Part Overview

The MP4KE170AE3 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 a reverse standoff voltage of 145V and provides clamping at 234V maximum, with a peak pulse current rating of 1.7A. The device is classified as Active product status and carries Military grade qualification under MIL-PRF-19500. Equivalent and substitute parts are identified to address inventory availability, packaging preferences, and compliance requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

MP4KE170AE3

Microchip TechnologyIn Stock: 1136MP4KE170AE3 Datasheet

Current PartRFQ

P4KE170A

Taiwan Semiconductor CorporationIn Stock: 1050P4KE170A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MP4KE170AE3 are identified based on electrical parameter compatibility within the TVS diode category. The primary substitution criterion is functional equivalence across the following parameters:

• Voltage Rating Match: Reverse standoff voltage of 145V, breakdown voltage minimum of 162V, and clamping voltage maximum of 234V must be identical or within acceptable tolerance
• Current Rating Compatibility: Peak pulse current rating must support the application requirement; the substitute P4KE170A provides 1.8A, which exceeds the 1.7A specification
• Package Compatibility: Both parts utilize DO-204AL (DO-41) axial through-hole packaging, ensuring mechanical interchangeability
• Unidirectional Configuration: Single-channel Zener-type TVS diode topology must be maintained
• Power Dissipation: Peak pulse power rating of 400W is consistent across both parts

The P4KE170A from Taiwan Semiconductor Corporation qualifies as a direct substitute based on identical voltage parameters and compatible current ratings within the same package form factor.

Parameter Comparison

Engineering Selection Recommendations

MP4KE170AE3 (Microchip Technology)

Select this part when Military grade qualification and MIL-PRF-19500 certification are mandatory requirements. This device is RoHS non-compliant and carries Active product status. The part is available in Bulk packaging with 1084 units in stock. Operating temperature range extends to -65°C minimum, suitable for extended cold-temperature applications.

P4KE170A (Taiwan Semiconductor Corporation)

Select this substitute when RoHS3 compliance is required for the application or end-product. The P4KE170A provides identical voltage parameters with a higher peak pulse current rating of 1.8A and an extended upper operating temperature limit of 175°C. This part is available in Tape & Reel packaging with 1027 units in stock. The substitute maintains full electrical compatibility while offering improved thermal performance and regulatory compliance.

Both parts are Active status products and share identical voltage specifications, package form factor, and power dissipation characteristics. Selection between these parts depends on compliance requirements, packaging format preference, and temperature operating range constraints specific to the application.

Frequently Asked Questions (FAQ)

Q: Can the P4KE170A directly replace the MP4KE170AE3 in existing designs?

A: Yes. Both parts are electrically equivalent across all critical voltage parameters (145V standoff, 162V breakdown minimum, 234V clamping maximum) and share identical DO-204AL (DO-41) through-hole packaging. The P4KE170A provides a higher peak pulse current rating (1.8A versus 1.7A), which is compatible with applications designed for the original part.

Q: What is the primary difference between these two TVS diodes?

A: The primary differences are manufacturer origin, packaging format, compliance certification, and operating temperature range. The MP4KE170AE3 carries Military grade qualification (MIL-PRF-19500) and operates from -65°C to 150°C. The P4KE170A is RoHS3 compliant and operates from -55°C to 175°C, offering a wider high-temperature capability.

Q: Are there packaging differences between these parts?

A: Yes. The MP4KE170AE3 is supplied in Bulk packaging, while the P4KE170A is supplied in Tape & Reel (TR) format. Both use identical DO-204AL (DO-41) axial through-hole component geometry, ensuring mechanical interchangeability on printed circuit boards.

Q: Which part should be selected for RoHS-compliant applications?

A: The P4KE170A is RoHS3 compliant and must be selected for applications requiring RoHS compliance. The MP4KE170AE3 is RoHS non-compliant and is not suitable for RoHS-regulated end products.

Q: Is the higher current rating of the P4KE170A (1.8A) a concern for compatibility?

A: No. A higher peak pulse current rating is compatible with applications designed for the lower 1.7A specification. The substitute part provides additional margin and does not create compatibility issues.

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

A: The MP4KE170AE3 operates from -65°C to 150°C, while the P4KE170A operates from -55°C to 175°C. For applications requiring operation below -55°C, the MP4KE170AE3 must be used. For applications requiring operation above 150°C, the P4KE170A must be used. For applications within the -55°C to 150°C range, both parts are compatible.

Q: Are both parts suitable for general-purpose overvoltage protection?

A: Yes. Both the MP4KE170AE3 and P4KE170A are classified for general-purpose applications and provide identical voltage clamping and suppression characteristics. Application suitability depends on compliance requirements and operating temperature constraints specific to the end-use environment.