5KP8.5CA-G Equivalent & Substitute Parts

Part Overview

The 5KP8.5CA-G is a transient voltage suppressor (TVS) diode manufactured by Comchip Technology, designed for general-purpose voltage clamping applications. This through-hole component features an 8.5V reverse standoff voltage and 14.4V maximum clamping voltage, with a peak pulse current rating of 347.22A and 5000W peak pulse power handling. The part is Active status and ROHS3 compliant, making it suitable for modern electronic designs requiring transient protection.

Substitute parts are identified when electrical characteristics and mechanical compatibility align within the specified parameters for this TVS diode category, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

5KP8.5CA-G

Comchip TechnologyIn Stock: 10225KP8.5CA-G Datasheet

Current PartRFQ

SA8.5CA

Taiwan Semiconductor CorporationIn Stock: 16110SA8.5CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP8.5CA-G is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 8.5V
• Voltage - Clamping (Max) @ Ipp: 14.4V
• Mounting Type: Through Hole
• Type: Zener (Bidirectional, 1 Channel)
• RoHS Status: ROHS3 Compliant

The SA8.5CA qualifies as a substitute part because it maintains identical voltage specifications (8.5V standoff, 14.4V clamping), operates as a through-hole mounted zener TVS diode, and meets ROHS3 compliance requirements. Differences in peak pulse current (36A vs. 347.22A) and package form factor (DO-204AC vs. R-6) represent design trade-offs that may be acceptable depending on application current requirements and board layout constraints.

Parameter Comparison

Engineering Selection Recommendations

Both the 5KP8.5CA-G and SA8.5CA are Active status components with ROHS3 compliance and REACH unaffected designation, meeting current regulatory requirements for electronic component procurement.

The primary selection criterion between these parts is peak pulse current and power handling capacity. The 5KP8.5CA-G provides 347.22A peak pulse current and 5000W power dissipation, suitable for high-energy transient suppression applications. The SA8.5CA provides 36A peak pulse current and 500W power dissipation, appropriate for lower-energy transient events.

Package form factor differs between the two parts: the 5KP8.5CA-G uses R-6 axial packaging, while the SA8.5CA uses DO-204AC (DO-15) axial packaging. Both are through-hole mounted and axial in orientation, but board layout and lead spacing must accommodate the specific package geometry.

The SA8.5CA operates across a wider temperature range (-55 to 175°C vs. -55 to 150°C), providing extended thermal performance margin in high-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can SA8.5CA directly replace 5KP8.5CA-G in all applications?

A: Direct replacement is possible only when the application peak pulse current does not exceed 36A and power dissipation remains below 500W. Voltage clamping characteristics are identical, ensuring equivalent transient suppression at the specified voltage levels. Board layout must accommodate the DO-204AC package geometry.

Q: What are the key differences between R-6 and DO-204AC packages?

A: Both are through-hole axial packages with different physical dimensions and lead spacing. R-6 is a larger package format, while DO-204AC (DO-15) is a smaller standard package. Component selection must align with available board footprint and lead hole spacing.

Q: Are both parts suitable for high-reliability applications?

A: Both parts are Active status, ROHS3 compliant, and REACH unaffected. Compliance certifications are equivalent. Selection between them depends on application current and power requirements, not regulatory status.

Q: What is the significance of the 8.5V reverse standoff voltage?

A: The 8.5V reverse standoff voltage defines the maximum voltage the diode can withstand without conducting. This parameter is identical in both parts, ensuring equivalent circuit protection behavior at the specified voltage threshold.

Q: Can package form factor affect circuit performance?

A: Package form factor affects board layout, lead inductance, and thermal dissipation characteristics. Electrical performance (voltage and current ratings) remains equivalent between R-6 and DO-204AC packages. Application-specific thermal and layout requirements must be evaluated.