5KP85A-E3/51 Equivalent & Substitute Parts

Part Overview

The 5KP85A-E3/51 is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This component is designed for general-purpose transient voltage protection applications with an 85V reverse standoff voltage and 5000W peak pulse power rating. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

5KP85A-E3/51

Vishay General Semiconductor - Diodes DivisionIn Stock: 10555KP85A-E3/51 Datasheet

Current PartRFQ

5KP85AHE3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 10515KP85AHE3/54 Datasheet

DirectRFQ

5KP85A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 83255KP85A-E3/54 Datasheet

MFR RecommendedRFQ

5KP85AE3/TR13

Microchip TechnologyIn Stock: 6815KP85AE3/TR13 Datasheet

DirectRFQ

15KPA85A

MDE Semiconductor IncIn Stock: 183315KPA85A Datasheet

MFR RecommendedRFQ

15KPA85A-B

Littelfuse Inc.In Stock: 87715KPA85A-B Datasheet

MFR RecommendedRFQ

15KPA85A-HR

LittelfuseIn Stock: 90315KPA85A-HR Datasheet

MFR RecommendedRFQ

15KPA85A-HRA

Littelfuse Inc.In Stock: 114115KPA85A-HRA Datasheet

MFR RecommendedRFQ

5KP85A

Diotec SemiconductorIn Stock: 44055KP85A Datasheet

MFR RecommendedRFQ

5KP85A-B

Littelfuse Inc.In Stock: 10235KP85A-B Datasheet

MFR RecommendedRFQ

5KP85A-HR

Littelfuse Inc.In Stock: 7455KP85A-HR Datasheet

MFR RecommendedRFQ

5KP85A-HRA

Littelfuse Inc.In Stock: 9135KP85A-HRA Datasheet

MFR RecommendedRFQ

5KP85A-TP

Micro Commercial CoIn Stock: 7175KP85A-TP Datasheet

MFR RecommendedRFQ

5KP85E3/TR13

Microchip TechnologyIn Stock: 9135KP85E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 5KP85A-E3/51 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 85V
• Voltage - Clamping (Max) @ Ipp: 137V (±0.6V tolerance acceptable)
• Current - Peak Pulse (10/1000µs): 36.5A minimum
• Power - Peak Pulse: 5000W minimum
• Mounting Type: Through Hole
• Package / Case: P600, Axial
• Type: Zener, Unidirectional

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (5kW Power Rating): Parts with identical voltage specifications and 5000W peak pulse power rating. These provide direct functional replacement with matching electrical performance.

Category B - Higher Power Alternatives (15kW Power Rating): Parts with identical voltage specifications but 15000W peak pulse power rating and higher peak pulse current (109.7A). These provide enhanced transient protection capability while maintaining voltage compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents):

5KP85A-E3/54 (Vishay) and 5KP85AE3/TR13 (Microchip Technology) are the recommended primary substitutes. Both maintain active product status, identical voltage specifications (85V reverse standoff, 137V clamping), and equivalent 5000W power rating. 5KP85A-E3/54 is available in higher inventory (8300 pcs) and represents the manufacturer-recommended replacement for the obsolete 5KP85A-E3/51.

5KP85A-B (Littelfuse Inc.) and 5KP85A-HR (Littelfuse Inc.) provide equivalent electrical performance with active product status. These parts are suitable for applications requiring the same transient protection characteristics as the original part.

5KP85A (Diotec Semiconductor) is functionally equivalent with a minimum peak pulse current specification of 36A, meeting the 36.5A requirement of the original part.

Higher Power Alternatives:

15KPA85A, 15KPA85A-B, 15KPA85A-HR, and 15KPA85A-HRA are suitable for applications where enhanced transient suppression capability is beneficial. These parts maintain the 85V voltage class while providing 15000W peak pulse power and 109.7A peak pulse current. Selection among these variants depends on packaging requirements (bulk vs. tape & reel) and supplier availability.

All substitute parts listed are ROHS3 compliant and suitable for general-purpose transient voltage suppression applications.

Frequently Asked Questions (FAQ)

Q: Can I use a 15kW rated TVS diode as a substitute for the 5kW rated 5KP85A-E3/51?

A: Yes. The 15KPA85A series parts maintain the same 85V voltage class and P600 axial package. The higher power rating provides additional transient suppression capability without affecting circuit compatibility. The voltage specifications (85V reverse standoff, 137.6V clamping) remain within acceptable tolerance of the original part.

Q: What is the difference between 5KP85A-E3/54 and 5KP85AE3/TR13?

A: Both parts are electrically identical with 85V reverse standoff, 137V clamping voltage, and 5000W power rating. The primary difference is manufacturer: 5KP85A-E3/54 is from Vishay, while 5KP85AE3/TR13 is from Microchip Technology. Both are active products suitable for direct substitution.

Q: Are all substitute parts available in the same P600 axial package?

A: Yes. All substitute parts listed use the P600 axial through-hole package, ensuring mechanical and electrical compatibility with the original 5KP85A-E3/51 footprint.

Q: What is the significance of the -HR and -HRA suffixes on Littelfuse parts?

A: The -HR and -HRA designations indicate tape & reel packaging variants from Littelfuse. These parts are electrically identical to their bulk counterparts but supplied in automated handling formats. Selection depends on procurement and assembly requirements.

Q: Can I substitute 5KP85A-E3/51 with a part from a different voltage class?

A: No. Substitution is limited to parts with 85V reverse standoff voltage. Using a different voltage class would alter circuit protection characteristics and is not acceptable.

Q: Is the 5KP85A-E3/51 still available for procurement?

A: The 5KP85A-E3/51 is listed as obsolete. Active substitutes must be used for new designs and ongoing procurement. 5KP85A-E3/54 from Vishay is the recommended replacement.