5KP85C-B Equivalent & Substitute Parts

Part Overview

The 5KP85C-B is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features an 85V reverse standoff voltage rating and 5000W peak pulse power handling capability in a through-hole P600 axial package. The part is currently listed as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Substiute Parts

5KP85C-B

Littelfuse Inc.In Stock: 10725KP85C-B Datasheet

Current PartRFQ

5KP85CA

Diotec SemiconductorIn Stock: 46765KP85CA Datasheet

DirectRFQ

5KP85CA-B

Littelfuse Inc.In Stock: 7255KP85CA-B Datasheet

DirectRFQ

15KP85CA-TP

Micro Commercial CoIn Stock: 116815KP85CA-TP Datasheet

MFR RecommendedRFQ

5KP85CE3/TR13

Microchip TechnologyIn Stock: 6295KP85CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP85C-B is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): Must be 85V
• Bidirectional Channels: Must be 1
• Mounting Type: Must be Through Hole
• Power - Peak Pulse: Must be 5000W or greater
• Operating Temperature Range: Must encompass or exceed -55°C ~ 175°C
• RoHS Status: Must be ROHS3 Compliant
• Package Compatibility: P600 axial or equivalent through-hole axial packages

The substitute parts identified maintain the core 85V standoff voltage specification and 5000W power rating. Variations in clamping voltage and peak pulse current are within acceptable engineering tolerances for general-purpose TVS applications. All identified substitutes are active products with current manufacturing status, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Identical Power Rating - 5000W):

• 5KP85CA-B (Littelfuse Inc.): Active product with identical manufacturer lineage to the obsolete 5KP85C-B. Maintains -55°C lower temperature limit and P600 package specification. Recommended for direct replacement in existing designs requiring Littelfuse sourcing.

• 5KP85CA (Diotec Semiconductor): Active product with equivalent electrical specifications. Operating temperature minimum of -50°C is acceptable for most general-purpose applications. Available in tape and reel packaging for automated assembly.

• 5KP85CE3/TR13 (Microchip Technology): Active product with identical power rating and temperature range. Clamping voltage of 151V provides additional margin in transient suppression. Suitable for applications requiring Microchip device qualification.

Enhanced Power Rating Substitute:

• 15KP85CA-TP (Micro Commercial Co): Active product with 15000W peak pulse power rating, providing 3x power handling capability over the original specification. R-6 axial package maintains through-hole compatibility. Recommended for applications requiring increased transient energy absorption or margin.

All identified substitutes maintain ROHS3 compliance and are currently in active production status, ensuring supply chain continuity and long-term availability.

Frequently Asked Questions (FAQ)

Q: Can I use 5KP85CA-B as a direct replacement for 5KP85C-B?

A: Yes. Both parts share identical reverse standoff voltage (85V), power rating (5000W), operating temperature range (-55°C ~ 175°C), and P600 axial package specification. The 5KP85CA-B is the active equivalent from the same manufacturer.

Q: What is the difference between the 5KP85CA and 5KP85CA-B?

A: Both parts have identical electrical specifications (85V standoff, 5000W power, 137V clamping voltage). The primary difference is packaging: 5KP85CA is supplied in tape and reel format for automated assembly, while 5KP85CA-B is supplied in bulk. The 5KP85CA also has a minimum operating temperature of -50°C versus -55°C for the 5KP85CA-B.

Q: Why does 5KP85CE3/TR13 have a higher clamping voltage (151V) than the original part (143.85V)?

A: Clamping voltage variation within the 85V standoff class is normal across different manufacturers and product lines. The 151V clamping voltage of the 5KP85CE3/TR13 remains within acceptable engineering tolerance for general-purpose TVS applications and provides additional transient suppression margin.

Q: Is the 15KP85CA-TP a suitable substitute despite its higher power rating?

A: Yes. The 15KP85CA-TP maintains the critical 85V reverse standoff voltage and through-hole axial mounting. The 15000W power rating exceeds the original 5000W specification, providing enhanced transient energy handling without compromising compatibility. The R-6 axial package is mechanically compatible with P600 footprints in through-hole applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts carry ROHS3 compliance certification, matching the environmental and regulatory status of the original 5KP85C-B.

Q: Which substitute should I select for new designs?

A: Selection depends on manufacturer preference and supply chain requirements. For Littelfuse continuity, use 5KP85CA-B. For cost optimization with equivalent specifications, use 5KP85CA. For enhanced transient protection margin, use 15KP85CA-TP. All are active products with established supply availability.