5KP85C Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The 5KP85C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage 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 5KP85C is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.

Substiute Parts

5KP85C

Littelfuse Inc.In Stock: 11775KP85C Datasheet

Current PartRFQ

5KP85CA

Diotec SemiconductorIn Stock: 46765KP85CA 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 is determined by the following critical parameters:

• Voltage Rating Match: Reverse standoff voltage of 85V and breakdown voltage minimum of 89.28V or higher
• Power Dissipation: Peak pulse power rating of 5000W or greater
• Package Compatibility: Through-hole axial package (P600 or equivalent R-6 format)
• Bidirectional Operation: Single bidirectional channel configuration
• Temperature Range: Operating range encompassing -55°C to 175°C minimum
• Compliance: ROHS3 compliance required

Three active manufacturer alternatives meet these substitution criteria and are listed below.

Parameter Comparison

Engineering Selection Recommendations

5KP85CA (Diotec Semiconductor): This part maintains identical voltage ratings and power dissipation specifications as the 5KP85C while offering active product status. The P600 axial package provides direct mechanical compatibility. Operating temperature range extends to -50°C minimum, which covers most industrial applications. ROHS3 compliance is confirmed. This option is suitable for applications where the lower clamping voltage (137V vs 143.85V) is acceptable.

15KP85CA-TP (Micro Commercial Co): This part provides enhanced power dissipation capability at 15000W, exceeding the original 5000W specification. Voltage ratings and bidirectional configuration match the 5KP85C requirements. The R-6 axial package is mechanically compatible with through-hole mounting. Operating temperature range of -55°C to 175°C matches the original specification. ROHS3 compliance and EAR99 classification are confirmed. This option is recommended for applications requiring higher transient energy absorption.

5KP85CE3/TR13 (Microchip Technology): This part delivers matching voltage standoff and breakdown specifications with identical 5000W power rating. The P600 axial package provides direct mechanical compatibility. Operating temperature range of -55°C to 175°C matches the original specification exactly. Clamping voltage is higher at 151V, providing additional margin in overvoltage protection. ROHS3 compliance and REACH unaffected status are confirmed. This option is recommended for applications requiring precise clamping voltage control.

All three substitutes are active products with confirmed ROHS3 compliance and suitable for direct replacement in new designs.

Frequently Asked Questions (FAQ)

Q: Can the 5KP85CA be used as a direct replacement for the 5KP85C?

A: Yes. The 5KP85CA maintains the critical electrical parameters: 85V reverse standoff voltage, 5000W peak pulse power, and bidirectional operation. The P600 axial package provides identical mechanical compatibility. The primary difference is the lower clamping voltage (137V vs 143.85V), which is acceptable for most general-purpose overvoltage protection applications.

Q: What is the difference between the 15KP85CA-TP and the 5KP85C?

A: The 15KP85CA-TP provides three times the peak pulse power rating (15000W vs 5000W) while maintaining the same 85V voltage rating and bidirectional configuration. The R-6 axial package is mechanically compatible with through-hole mounting. This part is suitable for applications requiring higher transient energy absorption. Voltage ratings and operating temperature range are equivalent.

Q: Why does the 5KP85CE3/TR13 have a higher clamping voltage?

A: The 5KP85CE3/TR13 exhibits a clamping voltage of 151V compared to the 5KP85C at 143.85V. This higher clamping voltage is within the acceptable range for 85V-rated TVS diodes and provides additional margin during transient suppression. The part maintains identical reverse standoff voltage, power rating, and operating temperature specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All three substitute parts (5KP85CA, 15KP85CA-TP, and 5KP85CE3/TR13) are confirmed ROHS3 compliant, meeting environmental and regulatory requirements for new product designs.

Q: Can the 15KP85CA-TP be used in space-constrained applications?

A: The 15KP85CA-TP uses the R-6 axial package, which is mechanically compatible with through-hole mounting. Package dimensions should be verified against specific board layout constraints. The enhanced power rating may provide design flexibility in applications where transient energy absorption is critical.

Q: What is the minimum operating temperature for each substitute?

A: The 5KP85CA operates from -50°C minimum, while both the 15KP85CA-TP and 5KP85CE3/TR13 operate from -55°C minimum, matching the original 5KP85C specification. For applications requiring -55°C operation, the 15KP85CA-TP or 5KP85CE3/TR13 are recommended.