3KP6.5A-B Equivalent & Substitute Parts

Part Overview

The 3KP6.5A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 6.5V reverse standoff voltage with an 11.2V maximum clamping voltage and peak pulse current rating of 267.9A at 3000W peak pulse power. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement.

Substiute Parts

3KP6.5A-B

Littelfuse Inc.In Stock: 8703KP6.5A-B Datasheet

Current PartRFQ

5KP6.5A-B

Littelfuse Inc.In Stock: 8275KP6.5A-B Datasheet

DirectRFQ

3KP6.5A-TP

Micro Commercial CoIn Stock: 10503KP6.5A-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the 3KP6.5A-B are identified based on strict electrical and mechanical parameter matching within the constraints of TVS diode specifications. The critical parameters determining substitution eligibility are:

• Voltage - Reverse Standoff (Typ): 6.5V
• Voltage - Clamping (Max) @ Ipp: 11.2V
• Unidirectional channel configuration: 1 channel
• Mounting Type: Through Hole
• Package compatibility: Axial form factor

The identified substitutes maintain identical voltage characteristics and unidirectional topology. Variations in peak pulse current and power ratings reflect different product series within the same voltage class, with the 5KP series offering higher current handling capability (455.4A vs. 267.9A) and correspondingly higher peak pulse power (5000W vs. 3000W). The 3KP6.5A-TP substitute maintains identical electrical performance with alternative packaging designation (R-6 vs. P600) and manufacturer (Micro Commercial Co vs. Littelfuse Inc.).

Parameter Comparison

Engineering Selection Recommendations

The 5KP6.5A-B is the primary recommended substitute for the obsolete 3KP6.5A-B. Both components are manufactured by Littelfuse Inc., maintain identical voltage specifications, and share the same P600 axial package form factor. The 5KP6.5A-B carries active product status with ROHS3 compliance certification, ensuring long-term availability and regulatory alignment. The higher peak pulse current (455.4A) and power rating (5000W) provide enhanced transient suppression capability without compromising circuit compatibility.

The 3KP6.5A-TP, manufactured by Micro Commercial Co, provides an alternative substitute with identical electrical performance and current/power ratings matching the original 3KP6.5A-B. This component maintains active product status and REACH compliance. The R-6 package designation represents an alternative axial form factor; physical dimensions and lead spacing must be verified for PCB layout compatibility before selection.

Frequently Asked Questions (FAQ)

Q: Can the 5KP6.5A-B directly replace the 3KP6.5A-B without circuit modification?

A: Yes. Both components share identical voltage specifications (6.5V reverse standoff, 11.2V clamping), unidirectional topology, and P600 axial package form factor. The 5KP6.5A-B's higher current and power ratings provide equivalent or superior performance in the same circuit application.

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

A: Both are axial through-hole packages for TVS diodes. P600 and R-6 represent different supplier package specifications. Physical lead spacing and body dimensions may differ; PCB layout compatibility must be confirmed before substitution.

Q: Is the 3KP6.5A-TP suitable for applications requiring ROHS3 compliance?

A: The 3KP6.5A-TP does not specify ROHS3 compliance in the provided data. The 5KP6.5A-B explicitly carries ROHS3 certification and is the preferred choice for applications with regulatory compliance requirements.

Q: Why does the 5KP6.5A-B have higher peak pulse current and power ratings?

A: The 5KP series represents a higher-power variant within the same voltage class. The 5KP6.5A-B (455.4A, 5000W) and 3KP6.5A-B (267.9A, 3000W) maintain identical clamping voltage characteristics but differ in transient energy handling capacity. Selection depends on circuit transient severity requirements.

Q: Are there any thermal or operating temperature differences between substitutes?

A: All three components specify identical operating temperature ranges (-55°C to 175°C junction temperature), ensuring thermal performance equivalence across substitution options.