3KP100A Equivalent & Substitute Parts

Part Overview

The 3KP100A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 100V reverse standoff voltage with a 162V maximum clamping voltage and 18.5A peak pulse current capability in a through-hole P600 axial package. The 3KP100A is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

3KP100A

Littelfuse Inc.In Stock: 23013KP100A Datasheet

Current PartRFQ

5KP100A

Littelfuse Inc.In Stock: 42085KP100A Datasheet

DirectRFQ

3KP100A-TP

Micro Commercial CoIn Stock: 10753KP100A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3KP100A are identified based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 100V
• Voltage - Clamping (Max) @ Ipp: 162V
• Operating Temperature Range: -55°C to 175°C (TJ)
• Type: Zener, Unidirectional

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: P600 or equivalent axial package

Compliance Criteria:

• RoHS3 Compliant status

Substitute parts are grouped into two categories: direct electrical equivalents with identical performance specifications, and manufacturer-recommended alternatives that maintain functional compatibility within the specified parameter ranges.

Parameter Comparison

Engineering Selection Recommendations

5KP100A (Littelfuse Inc.): This part maintains identical voltage specifications and package form factor (P600, Axial) as the 3KP100A while offering enhanced current and power handling capabilities (31.5A peak pulse, 5000W peak power versus 18.5A and 3000W). The 5KP100A is active in production status with ROHS3 compliance, providing long-term availability and regulatory alignment. This substitute is suitable for applications where the original 3KP100A specifications are met or exceeded.

3KP100A-TP (Micro Commercial Co): This manufacturer-recommended alternative provides electrical equivalence with identical voltage and current specifications (100V standoff, 162V clamping, 18.5A peak pulse, 3000W peak power). The part is active in production status. The package designation differs (R-6 versus P600), requiring mechanical verification for board-level compatibility. This substitute is appropriate for direct functional replacement where package footprint compatibility is confirmed.

Frequently Asked Questions (FAQ)

Q: Can the 5KP100A directly replace the 3KP100A in existing designs?

A: The 5KP100A maintains identical voltage specifications and P600 axial package form factor. The increased current rating (31.5A versus 18.5A) and power dissipation (5000W versus 3000W) represent enhanced capabilities that do not compromise compatibility. Direct substitution is permissible from an electrical and mechanical standpoint.

Q: What is the difference between the P600 and R-6 packages?

A: Both are axial through-hole packages for TVS diodes. The P600 and R-6 designations represent different supplier package specifications. Physical verification of board-level footprint compatibility is required before substituting 3KP100A-TP for the original 3KP100A.

Q: Why is the 3KP100A listed as obsolete?

A: Obsolete status indicates the part is no longer in active production by the original manufacturer. The 5KP100A and 3KP100A-TP are active alternatives that provide equivalent or superior performance characteristics.

Q: Are all substitute parts RoHS3 compliant?

A: The 5KP100A is confirmed ROHS3 compliant. RoHS compliance status for 3KP100A-TP is not specified in the provided data and should be verified with the manufacturer before use in regulated applications.

Q: What are the critical parameters for TVS diode substitution?

A: Reverse standoff voltage, clamping voltage, peak pulse current, operating temperature range, and package form factor are the primary parameters determining substitution compatibility. All listed substitutes maintain the 100V standoff and 162V clamping specifications of the original 3KP100A.