5KP85A Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The 5KP85A is an active Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage transient protection applications. This unidirectional zener diode operates with an 85V reverse standoff voltage and provides peak pulse power dissipation of 5000W. The component is housed in a P600 axial through-hole package and maintains active product status with full RoHS3 compliance. Substitute parts are identified to support inventory availability, supply chain continuity, and equivalent circuit performance in applications where the original part number may be unavailable or where design flexibility permits cross-component selection.

Substiute Parts

5KP85A

Littelfuse Inc.In Stock: 44045KP85A Datasheet

Current PartRFQ

5KP85A-E3/54

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP85A is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 85V
• Voltage - Clamping (Max) @ Ipp: 137V
• Voltage - Breakdown (Min): 94.4V
• Current - Peak Pulse (10/1000µs): ≥36.5A
• Power - Peak Pulse: 5000W (5kW)
• Package / Case: P600, Axial
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C to 175°C (TJ)
• Type: Zener, Unidirectional (1 channel)

The identified substitute part 5KP85A-E3/54 meets all critical electrical and mechanical parameters within acceptable engineering tolerances. Both parts are manufactured to identical voltage specifications and power ratings, with peak pulse current performance within 1.9% variance (37.2A vs. 36.5A). Both components share identical package geometry, thermal operating range, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the 5KP85A (Littelfuse Inc.) and 5KP85A-E3/54 (Vishay General Semiconductor - Diodes Division) are active products with full RoHS3 and REACH compliance. Selection between these components should be based on:

• Inventory availability and lead time requirements
• Supplier qualification and procurement agreements
• PCB assembly process compatibility with through-hole P600 axial packaging
• Thermal management design confirmation for 5000W peak pulse dissipation

The 0.7A variance in peak pulse current (37.2A vs. 36.5A) represents a 1.9% difference and does not affect functional equivalence for general-purpose transient voltage suppression applications. Both components maintain identical voltage clamping characteristics and thermal operating specifications.

Frequently Asked Questions (FAQ)

Q: Can 5KP85A-E3/54 be used as a direct replacement for 5KP85A in existing designs?

A: Yes. Both components share identical voltage specifications (85V standoff, 137V clamping), power ratings (5000W), package geometry (P600 axial), and thermal operating range (-55°C to 175°C). The peak pulse current difference of 0.7A is within acceptable engineering tolerance for general-purpose TVS applications.

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

A: Reverse standoff voltage (85V), clamping voltage (137V), breakdown voltage (94.4V), peak pulse power (5000W), package type (P600 axial through-hole), and operating temperature range (-55°C to 175°C) must remain equivalent. Peak pulse current must be ≥36.5A.

Q: Are there compliance differences between the two parts?

A: No. Both 5KP85A and 5KP85A-E3/54 are RoHS3 compliant and REACH unaffected. Both carry EAR99 export classification and identical HTSUS codes.

Q: Does the P600 axial package require specific PCB layout considerations?

A: P600 axial packages are through-hole components requiring standard lead spacing and soldering processes. Ensure PCB design accommodates axial lead geometry and thermal dissipation requirements for 5000W peak pulse applications.

Q: What is the difference between 5KP85A and 5KP85A-E3/54 part numbering?

A: The suffix "-E3/54" indicates Vishay's internal manufacturing code and tape/reel packaging specification. The core electrical specifications remain identical to the base 5KP85A designation.