Littelfuse 3KP10 Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The Littelfuse 3KP10 is a unidirectional Zener transient voltage suppressor (TVS) diode designed for general-purpose overvoltage protection applications. With a 10V reverse standoff voltage and 3kW peak pulse power rating, it provides transient suppression in through-hole P600 axial packaging.

The 3KP10 is classified as obsolete. Identifying suitable substitute components ensures design continuity and maintains supply chain reliability for applications requiring equivalent transient voltage suppression performance.

Substiute Parts

3KP10

Littelfuse Inc.In Stock: 8583KP10 Datasheet

Current PartRFQ

5KP10A

LittelfuseIn Stock: 42935KP10A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP10 is determined by the following critical parameters:

• Voltage Rating: Reverse standoff voltage of 10V and breakdown voltage range (10.53V minimum) establish the protection threshold
• Package Compatibility: P600 axial through-hole package ensures mechanical and electrical fit
• Diode Type: Unidirectional Zener configuration for single-polarity transient suppression
• Power Dissipation: Peak pulse power rating determines surge handling capability
• Temperature Range: Operating range of -55°C to 175°C (TJ) defines thermal performance envelope
• Regulatory Compliance: ROHS3 compliance and EAR99 classification

The 5KP10A from Littelfuse meets these substitution criteria while offering enhanced performance characteristics in an active product status.

Parameter Comparison

Engineering Selection Recommendations

The 5KP10A qualifies as a direct substitute for the 3KP10 based on the following factors:

• Voltage Compatibility: Both devices maintain the 10V reverse standoff voltage specification, ensuring equivalent protection thresholds in circuit applications
• Package Equivalence: Identical P600 axial through-hole packaging permits direct board-level replacement without layout modifications
• Regulatory Alignment: Both components meet ROHS3 compliance and carry EAR99 classification
• Active Product Status: The 5KP10A is an active product from the same manufacturer, ensuring long-term availability and supply chain continuity
• Enhanced Performance: The 5KP10A provides higher peak pulse current (300A vs. 176.5A) and greater peak pulse power (5000W vs. 3000W), offering improved transient suppression capability within the same voltage class and package form factor

Frequently Asked Questions (FAQ)

Q: Can the 5KP10A be used as a direct replacement for the 3KP10 in existing designs?

A: Yes. Both devices share identical reverse standoff voltage (10V), breakdown voltage range, P600 axial package, and operating temperature specifications. The 5KP10A can be substituted without circuit redesign or board layout changes.

Q: What is the primary difference between the 3KP10 and 5KP10A?

A: The 5KP10A provides higher peak pulse current (300A vs. 176.5A) and greater peak pulse power dissipation (5000W vs. 3000W). Both maintain the same voltage protection characteristics and package form factor.

Q: Are there any thermal or mounting considerations when substituting the 5KP10A?

A: No. Both devices operate across the identical temperature range (-55°C to 175°C TJ) and use the same through-hole P600 axial mounting method. Thermal and mechanical installation requirements remain unchanged.

Q: Does the 5KP10A meet the same regulatory requirements as the 3KP10?

A: Yes. The 5KP10A is ROHS3 compliant and carries the same EAR99 export classification as the 3KP10.

Q: Why is the 3KP10 listed as obsolete?

A: The 3KP10 has been discontinued by Littelfuse. The 5KP10A represents the active product line continuation within the same voltage class and package category, providing equivalent functionality with enhanced performance specifications.