Equivalent & Substitute Parts for 5KP8.0 TVS Diode

Part Overview

The 5KP8.0 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This component features an 8V reverse standoff voltage rating and 5000W peak pulse power handling capability in a through-hole P600 axial package. The 5KP8.0 is currently classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

5KP8.0

Littelfuse Inc.In Stock: 8795KP8.0 Datasheet

Current PartRFQ

5KP8.0A

Littelfuse Inc.In Stock: 33865KP8.0A Datasheet

DirectRFQ

SA8.0A

Taiwan Semiconductor CorporationIn Stock: 300339SA8.0A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 5KP8.0 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 8V
• Voltage - Breakdown (Min): 8.42V minimum
• Voltage - Clamping (Max) @ Ipp: Must not exceed 14.28V
• Type: Zener, unidirectional configuration
• Operating Temperature Range: -55°C ~ 175°C (TJ)

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package Configuration: Axial lead format

Compliance Requirements:

• RoHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The 5KP8.0 has two identified substitutes: the 5KP8.0A (direct manufacturer variant) and the SA8.0A (alternative manufacturer). Both maintain the core 8V voltage rating and unidirectional topology. The primary distinction between substitutes lies in peak pulse current handling, clamping voltage precision, and package availability.

Parameter Comparison

Engineering Selection Recommendations

5KP8.0A (Littelfuse Inc.): This is the primary substitute for the obsolete 5KP8.0. Both components share identical voltage ratings, power handling (5000W), and P600 axial package specifications. The 5KP8.0A is currently in active production status with substantial inventory availability (3300 pcs), ensuring long-term procurement viability. The clamping voltage is improved at 13.6V versus 14.28V, providing tighter voltage regulation. This substitute is recommended for direct replacement in existing designs without modification.

SA8.0A (Taiwan Semiconductor Corporation): This alternative maintains the 8V voltage rating and operating temperature range but differs in package format (DO-204AC/DO-15 versus P600) and power handling (500W versus 5000W). The SA8.0A is suitable only for applications where peak pulse power requirements do not exceed 500W and where the DO-204AC package footprint is acceptable. This substitute requires circuit board layout modification and is recommended only when P600 package availability is constrained.

Frequently Asked Questions (FAQ)

Q: Can the 5KP8.0A be used as a direct replacement for the 5KP8.0?

A: Yes. Both components share the same voltage rating (8V reverse standoff), unidirectional topology, power handling (5000W), and P600 axial package. The 5KP8.0A is the recommended substitute due to active production status and improved clamping voltage specification (13.6V).

Q: What are the key differences between the 5KP8.0A and SA8.0A?

A: The primary differences are package format and power rating. The 5KP8.0A uses the P600 axial package with 5000W peak pulse power, while the SA8.0A uses the DO-204AC (DO-15) package with 500W peak pulse power. Both maintain the 8V voltage rating and operating temperature range.

Q: Is the SA8.0A suitable for all applications using the 5KP8.0?

A: No. The SA8.0A is limited to applications requiring peak pulse power of 500W or less. Applications requiring the full 5000W power handling capability must use the 5KP8.0A. Additionally, the SA8.0A requires different board layout due to its DO-204AC package format.

Q: Are all substitutes RoHS3 compliant?

A: Yes. The 5KP8.0A and SA8.0A are both ROHS3 compliant with MSL rating of 1 (Unlimited), matching the compliance profile of the original 5KP8.0.

Q: What is the impact of the clamping voltage difference between 5KP8.0 (14.28V) and its substitutes (13.6V)?

A: The lower clamping voltage in the 5KP8.0A and SA8.0A provides improved transient suppression with tighter voltage regulation. This is a beneficial characteristic for circuit protection and does not create compatibility issues with the original design.

Q: Why is the 5KP8.0 classified as obsolete?

A: The 5KP8.0 has been superseded by the 5KP8.0A, which offers improved specifications and active manufacturing support. The 5KP8.0A is the recommended long-term solution for new designs and ongoing production.