Littelfuse 3KP5.0A Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The Littelfuse 3KP5.0A is a unidirectional Zener transient voltage suppressor (TVS) diode designed for general-purpose overvoltage protection applications. This component features a 5V reverse standoff voltage with a 9.2V maximum clamping voltage and 326.1A peak pulse current capability in a through-hole P600 axial package.

The 3KP5.0A is classified as obsolete. Identifying suitable substitute components ensures design continuity and maintains protection performance in applications where this part is currently specified.

Substiute Parts

3KP5.0A

Littelfuse Inc.In Stock: 11473KP5.0A Datasheet

Current PartRFQ

5KP5.0A

Littelfuse Inc.In Stock: 14525KP5.0A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP5.0A is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff: 5V (must match)
• Voltage - Breakdown (Min): 6.4V (must match)
• Voltage - Clamping (Max) @ Ipp: 9.2V (must match)
• Unidirectional Zener type configuration
• Operating temperature range: -55°C to 175°C (TJ)

Mechanical Compatibility Criteria:

• Package / Case: P600, Axial
• Mounting Type: Through Hole
• RoHS3 Compliance

Acceptable Variation:

• Current - Peak Pulse (10/1000µs): May exceed 326.1A (higher current rating provides equivalent or improved protection)
• Power - Peak Pulse: May exceed 3000W (higher power rating provides equivalent or improved protection)
• Product Status: Active status preferred over obsolete

The 5KP5.0A meets all electrical and mechanical compatibility criteria while offering enhanced current and power handling capabilities.

Parameter Comparison

Engineering Selection Recommendations

The 5KP5.0A is a direct electrical and mechanical substitute for the obsolete 3KP5.0A. Both components share identical voltage specifications (5V reverse standoff, 6.4V breakdown minimum, 9.2V clamping maximum), unidirectional Zener configuration, and P600 axial through-hole package.

The 5KP5.0A provides superior current handling (554.3A versus 326.1A) and power dissipation (5000W versus 3000W) while maintaining all other electrical and mechanical parameters. This enhanced capability ensures equivalent or improved protection performance in the same circuit application.

The 5KP5.0A holds Active product status and maintains ROHS3 compliance with MSL 1 rating, supporting long-term design continuity and supply chain reliability.

Frequently Asked Questions (FAQ)

Q: Can the 5KP5.0A directly replace the 3KP5.0A without circuit modification?

A: Yes. The 5KP5.0A is electrically and mechanically compatible. Identical voltage specifications (5V standoff, 6.4V breakdown, 9.2V clamping) and P600 axial through-hole package enable direct substitution. No circuit changes are required.

Q: What is the difference between the 3KP and 5KP series?

A: The primary difference is peak pulse current and power dissipation capability. The 3KP5.0A handles 326.1A at 3000W, while the 5KP5.0A handles 554.3A at 5000W. Both maintain identical voltage protection thresholds and package configuration.

Q: Why is the 3KP5.0A obsolete?

A: The 3KP5.0A is classified as obsolete by the manufacturer. The 5KP5.0A represents the current active equivalent with enhanced specifications.

Q: Are there any compliance or certification differences?

A: Both components are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. No compliance differences exist between the two parts.

Q: Can the 5KP5.0A be used in applications originally designed for the 3KP5.0A?

A: Yes. The 5KP5.0A meets or exceeds all electrical and mechanical requirements of the 3KP5.0A. The higher current and power ratings provide equivalent protection with additional margin.

Q: Is the P600 axial package the same for both parts?

A: Yes. Both the 3KP5.0A and 5KP5.0A use the P600 axial through-hole package with identical physical dimensions and pin configuration.