3KP5.0A-B Equivalent & Substitute Parts

Part Overview

The 3KP5.0A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., 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. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

3KP5.0A-B

Littelfuse Inc.In Stock: 11773KP5.0A-B Datasheet

Current PartRFQ

5KP5.0A-B

Littelfuse Inc.In Stock: 10045KP5.0A-B Datasheet

DirectRFQ

3KP5.0A-TP

Micro Commercial CoIn Stock: 9623KP5.0A-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP5.0A-B is determined by strict equivalence in the following critical electrical parameters:

• Voltage - Reverse Standoff: 5V
• Voltage - Breakdown (Min): 6.4V
• Voltage - Clamping (Max) @ Ipp: 9.2V
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Mounting Type: Through Hole
• Unidirectional Channels: 1

Substitute parts must maintain identical voltage specifications to ensure proper circuit protection without altering system behavior. Package variations (P600 vs. R-6) are permissible provided the axial through-hole mounting configuration is preserved. Current-handling capability and power dissipation may vary between substitutes, provided the application requirements do not exceed the substitute part's ratings.

Parameter Comparison

Engineering Selection Recommendations

5KP5.0A-B (Littelfuse Inc.): This substitute maintains identical voltage specifications and package configuration (P600, Axial) to the 3KP5.0A-B. The 5KP5.0A-B is an active product with current production status, ensuring long-term availability. It provides enhanced current-handling capability (554.3A vs. 326.1A) and increased power dissipation (5000W vs. 3000W), making it suitable for applications requiring higher transient energy absorption. Both parts are ROHS3 compliant.

3KP5.0A-TP (Micro Commercial Co): This substitute provides electrical equivalence with identical voltage and current specifications (326.1A, 3000W) to the 3KP5.0A-B. The primary distinction is the package variant (R-6 vs. P600), both maintaining axial through-hole mounting. The 3KP5.0A-TP is an active product with current production status. This option is appropriate for designs where package footprint differences are acceptable and component sourcing from alternative manufacturers is permissible.

Frequently Asked Questions (FAQ)

Q: Can the 5KP5.0A-B replace the 3KP5.0A-B in existing designs?

A: Yes. The 5KP5.0A-B maintains identical voltage specifications (5V standoff, 6.4V breakdown, 9.2V clamping) and package configuration (P600, Axial). The increased current and power ratings do not create compatibility issues; they provide additional margin for transient protection.

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

A: Both are axial through-hole packages for TVS diodes. P600 and R-6 represent different physical form factors from different manufacturers. Mechanical compatibility depends on PCB layout and lead spacing specifications. Verify footprint compatibility before substitution.

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

A: The 3KP5.0A-B is classified as obsolete by Littelfuse Inc. The 5KP5.0A-B represents the active product line continuation with equivalent electrical performance and enhanced specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. Both the 5KP5.0A-B and 3KP5.0A-TP are ROHS3 compliant, matching the compliance status of the 3KP5.0A-B.

Q: Can I use the 3KP5.0A-TP if my design requires the P600 package?

A: The 3KP5.0A-TP uses the R-6 package instead of P600. Package substitution requires verification of PCB footprint compatibility, lead spacing, and mechanical clearance. Electrical performance is equivalent.