5KP8.0A-B Equivalent & Substitute Parts

Part Overview

The 5KP8.0A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This through-hole component features an 8V reverse standoff voltage with a 13.6V maximum clamping voltage and 375A peak pulse current capability. The part is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges.

Substiute Parts

5KP8.0A-B

Littelfuse Inc.In Stock: 10545KP8.0A-B Datasheet

Current PartRFQ

SA8.0A

Taiwan Semiconductor CorporationIn Stock: 300339SA8.0A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5KP8.0A-B are qualified based on the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff: 8V (matching specification)
• Voltage - Breakdown (Min): 8.89V (matching specification)
• Voltage - Clamping (Max) @ Ipp: 13.6V (matching specification)
• Operating Temperature Range: -55°C to 175°C (matching specification)
• Type: Zener, Unidirectional (matching specification)
• Mounting Type: Through Hole (matching specification)
• RoHS3 Compliance: Required

The SA8.0A qualifies as a substitute part because it maintains identical voltage specifications (8V standoff, 8.89V breakdown, 13.6V clamping) and operating temperature range. Both parts are Zener-type, unidirectional TVS diodes with through-hole mounting and full RoHS3 compliance. Package differences (P600 vs. DO-204AC) and peak pulse current ratings (375A vs. 38A) represent design trade-offs that must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the 5KP8.0A-B and SA8.0A maintain identical voltage protection specifications and operating temperature ranges, ensuring equivalent transient suppression performance at the clamping voltage level. Selection between these parts should be based on application-specific current handling requirements and available board space for package accommodation.

The 5KP8.0A-B, with its 375A peak pulse current and 5kW power dissipation rating, is suitable for high-energy transient events. The SA8.0A, rated for 38A peak pulse current and 500W power dissipation, is appropriate for lower-energy transient protection scenarios. Both parts carry active product status and full RoHS3 compliance, confirming ongoing manufacturer support and environmental regulation adherence.

Frequently Asked Questions (FAQ)

Q: Can SA8.0A replace 5KP8.0A-B in all applications?

A: Electrical substitution is valid only when application transient energy levels do not exceed SA8.0A's 500W peak pulse power rating. The SA8.0A's 38A peak pulse current is substantially lower than the 5KP8.0A-B's 375A rating. Applications requiring the higher current handling capability must use the 5KP8.0A-B.

Q: Are the package differences significant?

A: Yes. The 5KP8.0A-B uses P600 package while SA8.0A uses DO-204AC (DO-15) package. Both are axial through-hole configurations, but physical dimensions differ. PCB layout and lead spacing must accommodate the selected package. Mechanical compatibility with existing board designs must be confirmed before substitution.

Q: Do both parts meet the same compliance standards?

A: Both parts are RoHS3 compliant with REACH Unaffected status and EAR99 ECCN classification. Moisture sensitivity level is 1 (Unlimited) for both parts, indicating no special moisture handling requirements during storage or assembly.

Q: What is the basis for voltage specification equivalence?

A: Both parts maintain identical reverse standoff voltage (8V), breakdown voltage minimum (8.89V), and maximum clamping voltage (13.6V). These parameters define the transient suppression threshold and clamping performance, which are functionally equivalent between the two parts.