Equivalent & Substitute Parts for 3KP8.0A TVS Diode

Part Overview

The 3KP8.0A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This component features an 8V reverse standoff voltage with a 13.6V maximum clamping voltage and 220.6A peak pulse current capability in a P600 axial through-hole package. The product is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

3KP8.0A

Littelfuse Inc.In Stock: 11233KP8.0A Datasheet

Current PartRFQ

5KP8.0A

Littelfuse Inc.In Stock: 33865KP8.0A Datasheet

DirectRFQ

3KP8.0A-TP

Micro Commercial CoIn Stock: 12073KP8.0A-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the 3KP8.0A are identified based on strict electrical and mechanical parameter matching within the TVS diode category. The substitution criteria are:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 8V
• Voltage - Breakdown (Min): 8.89V
• Voltage - Clamping (Max) @ Ipp: 13.6V
• Unidirectional Channels: 1
• Type: Zener
• Mounting Type: Through Hole
• Operating Temperature Range: -55°C ~ 175°C (TJ)

Allowable Variation Parameters:

• Current - Peak Pulse (10/1000µs): Equal or greater
• Power - Peak Pulse: Equal or greater
• Package / Case: P600 or R-6 axial configurations
• Manufacturer: Different manufacturers acceptable if electrical parameters match

The identified substitutes maintain identical voltage specifications and thermal operating range while accommodating higher current and power ratings where applicable.

Parameter Comparison

Engineering Selection Recommendations

5KP8.0A (Littelfuse Inc.): This substitute is an active product with identical voltage specifications and thermal operating range. It provides enhanced current and power handling capabilities (375A peak pulse, 5000W peak power) compared to the obsolete 3KP8.0A. Both components maintain ROHS3 compliance and P600 axial packaging. The 5KP8.0A is suitable for applications requiring equal or greater transient protection capacity.

3KP8.0A-TP (Micro Commercial Co): This substitute maintains electrical equivalence with the original 3KP8.0A, offering identical current and power ratings (220.6A, 3000W). The component is active and REACH compliant. The primary distinction is the R-6 axial package configuration instead of P600. This substitute is appropriate for designs where package footprint compatibility with R-6 specifications is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the 5KP8.0A replace the 3KP8.0A in all applications?

A: The 5KP8.0A maintains identical voltage specifications (8V reverse standoff, 13.6V clamping) and thermal range (-55°C to 175°C). The higher current and power ratings (375A, 5000W versus 220.6A, 3000W) make it suitable for equivalent or more demanding transient protection scenarios. Electrical compatibility is confirmed; circuit design review is recommended to confirm the application does not require the lower power rating of the original component.

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

A: Both P600 and R-6 are axial through-hole package configurations for TVS diodes. The primary difference is the physical package envelope and lead spacing. Component selection between these packages depends on PCB layout constraints and mechanical fit requirements. Electrical performance is equivalent within each package type.

Q: Why is the 3KP8.0A obsolete?

A: The 3KP8.0A is classified as obsolete by the manufacturer. The 5KP8.0A represents the active product line continuation with enhanced specifications. For new designs, the 5KP8.0A is the recommended selection. For legacy system support, the 3KP8.0A-TP provides electrical equivalence with active product availability.

Q: Are all substitutes RoHS compliant?

A: The 5KP8.0A is ROHS3 compliant. The 3KP8.0A-TP RoHS status is not specified in the provided data. Compliance verification with your procurement requirements is necessary before component selection.

Q: Can I use these substitutes interchangeably on the same PCB?

A: Electrical substitution is confirmed for voltage and thermal specifications. Physical interchangeability depends on package compatibility: P600 packages are directly interchangeable; R-6 packages require PCB layout verification for lead spacing and mounting hole alignment.