5KP8.5A-G Equivalent & Substitute Parts

Part Overview

The 5KP8.5A-G is a unidirectional 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. Substitute parts are identified when equivalent electrical parameters and mechanical compatibility are maintained within the specified tolerances.

Substiute Parts

5KP8.5A-G

Comchip TechnologyIn Stock: 11075KP8.5A-G Datasheet

Current PartRFQ

SA8.5A

Taiwan Semiconductor CorporationIn Stock: 8461SA8.5A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5KP8.5A-G are identified based on the following critical electrical parameters:

• Voltage - Reverse Standoff (Typ): 8.5V
• Voltage - Clamping (Max) @ Ipp: 14.4V
• Mounting Type: Through Hole
• Type: Zener, Unidirectional

The SA8.5A from Taiwan Semiconductor Corporation meets the core voltage specifications (8.5V standoff, 14.4V clamping) and maintains through-hole axial mounting compatibility. However, the SA8.5A operates at reduced peak pulse current (36A versus 347.22A) and lower peak pulse power (500W versus 5000W), making it suitable for lower-energy transient suppression applications within the same voltage class.

Parameter Comparison

Engineering Selection Recommendations

Both the 5KP8.5A-G and SA8.5A are Active status components with ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current applications. The primary selection criterion is peak pulse current and power handling capacity. The 5KP8.5A-G is specified for high-energy transient suppression with 347.22A peak pulse current and 5000W power dissipation. The SA8.5A is rated for lower-energy applications at 36A peak pulse current and 500W power dissipation. Selection between these parts depends on the actual transient energy levels present in the target circuit. Both maintain identical voltage clamping characteristics (8.5V standoff, 14.4V maximum clamp), ensuring equivalent voltage regulation performance within their respective power ratings.

Frequently Asked Questions (FAQ)

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

A: No. While both parts share identical voltage specifications (8.5V standoff, 14.4V clamping), the SA8.5A has significantly lower peak pulse current (36A) and power handling (500W) compared to the 5KP8.5A-G (347.22A, 5000W). Substitution is valid only for circuits where transient energy levels do not exceed the SA8.5A ratings.

Q: What is the difference between R-6 and DO-204AC packages?

A: Both are through-hole axial packages for TVS diodes. R-6 and DO-204AC (DO-15) are different mechanical form factors. Physical board layout and lead spacing must be verified for compatibility before substitution.

Q: Are there any temperature rating differences?

A: The SA8.5A operates to 175°C junction temperature, while the 5KP8.5A-G operates to 150°C. The SA8.5A provides a 25°C higher temperature margin, though this does not affect voltage clamping performance.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 5KP8.5A-G and SA8.5A are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS codes (8541.10.0080).

Q: What inventory availability should be considered?

A: The 5KP8.5A-G has 1089 pcs in stock (Tape & Box packaging). The SA8.5A has 8400 pcs in stock (Tape & Reel packaging). Packaging format differences may affect procurement logistics and lead times.