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

Part Overview

The Littelfuse 3KP5.0 is a unidirectional Zener-type transient voltage suppressor (TVS) diode designed for general-purpose overvoltage protection applications. This component features a 5V reverse standoff voltage with a 9.66V maximum clamping voltage and 326.1A peak pulse current capability in a through-hole P600 axial package.

The 3KP5.0 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

3KP5.0

Littelfuse Inc.In Stock: 10963KP5.0 Datasheet

Current PartRFQ

5KP5.0A

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

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the 3KP5.0 must satisfy the following criteria based on allowed electrical and mechanical parameters:

Electrical Compatibility Requirements:

• Identical reverse standoff voltage: 5V
• Identical unidirectional channel configuration: 1 channel
• Identical type classification: Zener
• Identical package and mounting: P600 axial, through-hole

Acceptable Parameter Variations:

• Voltage - Breakdown (Min): May vary within the 5V standoff class specification
• Voltage - Clamping (Max) @ Ipp: May vary within acceptable transient suppression range
• Current - Peak Pulse (10/1000µs): May be equal or higher
• Power - Peak Pulse: May be equal or higher
• Operating Temperature Range: Must maintain or exceed -55°C to 175°C

The 5KP5.0A meets all substitution criteria as an active-status alternative within the same voltage class and package configuration.

Parameter Comparison

Engineering Selection Recommendations

The 5KP5.0A is a direct substitute for the obsolete 3KP5.0 based on the following factors:

Product Status: The 5KP5.0A maintains active manufacturing status, ensuring long-term availability and supply chain continuity compared to the obsolete 3KP5.0.

Compliance & Certifications: Both components are ROHS3 compliant with identical moisture sensitivity levels (MSL 1, Unlimited), maintaining regulatory and environmental compliance requirements.

Electrical Performance: The 5KP5.0A provides enhanced peak pulse current (554.3A versus 326.1A) and peak pulse power (5000W versus 3000W) while maintaining the same 5V reverse standoff voltage and comparable clamping voltage performance. This represents a performance upgrade within the same voltage class.

Package Compatibility: Identical P600 axial through-hole packaging ensures direct mechanical and electrical compatibility without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the 5KP5.0A be used as a direct replacement for the 3KP5.0 without circuit modifications?

A: Yes. Both components share identical reverse standoff voltage (5V), unidirectional channel configuration, and P600 axial through-hole package. The 5KP5.0A provides higher peak pulse current and power ratings, making it suitable for direct substitution in existing designs.

Q: What is the significance of the different clamping voltages (9.66V vs. 9.2V)?

A: Both values fall within acceptable transient suppression performance for the 5V voltage class. The 5KP5.0A's lower clamping voltage (9.2V) provides marginally tighter voltage regulation during transient events.

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

A: No. Both components operate across the identical temperature range of -55°C to 175°C (TJ), ensuring equivalent thermal performance in all operating environments.

Q: Why does the 5KP5.0A have higher peak pulse ratings?

A: The 5KP5.0A represents an enhanced design within the same voltage class, offering improved transient energy handling (5000W versus 3000W) and higher peak pulse current capability (554.3A versus 326.1A). This upgrade maintains backward compatibility while providing additional design margin.

Q: Are both components RoHS compliant?

A: Yes. Both the 3KP5.0 and 5KP5.0A are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings, meeting current environmental and regulatory standards.