Equivalent & Substitute Parts for 3KP6.5 TVS Diode

Part Overview

The 3KP6.5 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 6.5V reverse standoff voltage and 3000W peak pulse power rating in a through-hole P600 axial package. The 3KP6.5 is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

3KP6.5

Littelfuse Inc.In Stock: 9863KP6.5 Datasheet

Current PartRFQ

5KP6.5A

Littelfuse Inc.In Stock: 26955KP6.5A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP6.5 is determined by the following critical parameters:

• Voltage Class: Reverse standoff voltage of 6.5V (nominal)
• Package Type: P600 axial through-hole configuration
• Unidirectional Operation: Single-channel zener TVS diode
• Temperature Range: -55°C to 175°C operating range
• Compliance: ROHS3 compliance requirement

The 5KP6.5A qualifies as a direct substitute based on matching voltage class, package type, unidirectional topology, temperature range, and regulatory compliance. The primary distinction is the increased power dissipation capability (5000W vs. 3000W), which represents an enhancement rather than a limitation for substitution purposes.

Parameter Comparison

Engineering Selection Recommendations

The 5KP6.5A is the active equivalent for the obsolete 3KP6.5. Both components are manufactured by Littelfuse Inc. and maintain identical voltage class (6.5V), package configuration (P600 axial), and operating temperature range (-55°C to 175°C). Both are ROHS3 compliant.

The 5KP6.5A offers superior performance characteristics with increased peak pulse current (455.4A vs. 267.9A) and peak pulse power (5000W vs. 3000W), while maintaining a lower clamping voltage (11.2V vs. 11.76V). These characteristics make the 5KP6.5A suitable for applications requiring the same voltage protection level with enhanced transient energy handling capability.

Selection of the 5KP6.5A eliminates obsolescence risk while providing equivalent or improved protection performance within the same physical footprint and electrical interface.

Frequently Asked Questions (FAQ)

Q: Can the 5KP6.5A directly replace the 3KP6.5 in existing designs?

A: Yes. Both components share identical reverse standoff voltage (6.5V), P600 axial package configuration, through-hole mounting, and operating temperature range (-55°C to 175°C). The 5KP6.5A is pin-compatible and functionally equivalent.

Q: What is the primary difference between these two parts?

A: The 5KP6.5A provides higher peak pulse power dissipation (5000W vs. 3000W) and peak pulse current (455.4A vs. 267.9A). The 5KP6.5A also features a lower clamping voltage (11.2V vs. 11.76V), offering improved transient suppression performance.

Q: Are both parts compliant with current regulatory requirements?

A: Yes. Both the 3KP6.5 and 5KP6.5A are ROHS3 compliant. The 5KP6.5A is currently in active production status, ensuring long-term availability and supply chain continuity.

Q: Does the increased power rating of the 5KP6.5A affect circuit compatibility?

A: No. The increased power rating represents enhanced capability and does not introduce compatibility issues. The component operates within the same voltage class and maintains identical package dimensions and pinout.

Q: What is the packaging difference between these parts?

A: The 3KP6.5 is supplied in standard packaging, while the 5KP6.5A is available in Tape & Reel (TR) format. Both use the P600 axial through-hole package. Tape & Reel packaging is standard for active production components and does not affect electrical performance or board-level compatibility.