Equivalent & Substitute Parts for 5KP8.5C

Part Overview

The 5KP8.5C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This component features an 8.5V reverse standoff voltage, 15.12V maximum clamping voltage, and 5000W peak pulse power rating in a through-hole P600 axial package. The product is currently obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

5KP8.5C

LittelfuseIn Stock: 7245KP8.5C Datasheet

Current PartRFQ

5KP8.5CA

Diotec SemiconductorIn Stock: 42515KP8.5CA Datasheet

DirectRFQ

SA8.5CA

Taiwan Semiconductor CorporationIn Stock: 16110SA8.5CA Datasheet

MFR RecommendedRFQ

5KP8.5CE3/TR13

Microchip TechnologyIn Stock: 10195KP8.5CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP8.5C is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): Must be 8.5V
• Bidirectional Channels: Must be 1
• Power - Peak Pulse: Must be 5000W (5kW)
• Mounting Type: Must be Through Hole
• RoHS Status: Must be ROHS3 Compliant

Three substitute parts meet these core criteria. The 5KP8.5CA (Diotec Semiconductor) and 5KP8.5CE3/TR13 (Microchip Technology) maintain identical P600 axial packaging and full 5000W power rating. The SA8.5CA (Taiwan Semiconductor Corporation) provides functional equivalence with the same 8.5V standoff voltage and bidirectional protection but operates at reduced 500W peak pulse power and uses DO-204AC (DO-15) packaging, making it suitable only for lower-power applications.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring full electrical and mechanical compatibility with the 5KP8.5C, the 5KP8.5CA (Diotec Semiconductor) and 5KP8.5CE3/TR13 (Microchip Technology) are the primary substitutes. Both maintain active product status, P600 axial packaging, 5000W peak pulse power rating, and ROHS3 compliance. The 5KP8.5CA offers the lowest clamping voltage at 14.4V, while the 5KP8.5CE3/TR13 provides 15.9V clamping, closest to the original 15.12V specification.

The SA8.5CA (Taiwan Semiconductor Corporation) is suitable only for applications where power dissipation does not exceed 500W peak pulse. This part uses DO-204AC (DO-15) packaging, which differs from the P600 axial package and may require circuit board layout modifications. The SA8.5CA maintains active product status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the SA8.5CA replace the 5KP8.5C in all applications?

A: No. The SA8.5CA operates at 500W peak pulse power, compared to the 5KP8.5C's 5000W rating. Use the SA8.5CA only in applications where peak pulse power does not exceed 500W. Additionally, the SA8.5CA uses DO-204AC (DO-15) packaging instead of P600, requiring circuit board layout changes.

Q: What is the difference between the 5KP8.5CA and 5KP8.5CE3/TR13?

A: Both parts maintain identical 8.5V standoff voltage, 5000W power rating, and P600 axial packaging. The primary difference is clamping voltage: 5KP8.5CA clamps at 14.4V maximum, while 5KP8.5CE3/TR13 clamps at 15.9V maximum. The 5KP8.5CE3/TR13 clamping voltage is closer to the original 5KP8.5C specification of 15.12V.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The 5KP8.5CA, 5KP8.5CE3/TR13, and SA8.5CA are all ROHS3 compliant, matching the original 5KP8.5C compliance status.

Q: What is the operating temperature range for substitute parts?

A: The 5KP8.5CE3/TR13 and SA8.5CA operate across -55°C to 175°C (TJ), identical to the original 5KP8.5C. The 5KP8.5CA operates across -50°C to 175°C (TJ), with a minimum temperature 5°C higher than the original specification.

Q: Can I use these substitutes interchangeably on the same circuit board?

A: The 5KP8.5CA and 5KP8.5CE3/TR13 are pin-compatible and use identical P600 axial packaging, allowing direct board-level substitution. The SA8.5CA uses DO-204AC (DO-15) packaging and requires circuit board layout modifications for installation.