Equivalent & Substitute Parts for 3KP8.0CA-B

Part Overview

The 3KP8.0CA-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose voltage protection applications. This bidirectional Zener diode provides transient suppression with an 8V reverse standoff voltage and 13.6V maximum clamping voltage. The part is classified as obsolete, making identification of suitable substitutes necessary for ongoing design support and procurement continuity.

Substiute Parts

3KP8.0CA-B

LittelfuseIn Stock: 8623KP8.0CA-B Datasheet

Current PartRFQ

5KP8.0CA-B

LittelfuseIn Stock: 11725KP8.0CA-B Datasheet

DirectRFQ

3KP8.0CA-TP

Micro Commercial CoIn Stock: 8143KP8.0CA-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3KP8.0CA-B are identified based on the following critical parameters that determine functional equivalence:

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

Two substitute parts meet these criteria with allowable variations in peak pulse current and power dissipation capacity:

5KP8.0CA-B (Littelfuse): Maintains identical voltage specifications and operating temperature range. Peak pulse current increases to 375A with corresponding 5000W power dissipation, representing a higher-rated variant within the same product family. Product status is Active.

3KP8.0CA-TP (Micro Commercial Co): Maintains identical voltage specifications, peak pulse current (220.6A), and power dissipation (3000W). Package variant changes from P600 to R-6 axial configuration. Product status is Active.

Parameter Comparison

Engineering Selection Recommendations

5KP8.0CA-B: This Littelfuse substitute maintains identical voltage specifications and package form factor (P600, Axial) as the original 3KP8.0CA-B. The increased peak pulse current (375A) and power dissipation (5000W) provide enhanced transient protection capability without compromising voltage regulation characteristics. Active product status ensures ongoing availability and manufacturer support. ROHS3 compliance is maintained.

3KP8.0CA-TP: This Micro Commercial Co substitute provides electrical equivalence with identical voltage specifications and power dissipation (3000W, 220.6A). The package variant (R-6 instead of P600) requires mechanical verification for PCB footprint compatibility. Active product status supports long-term procurement. REACH compliance is confirmed; RoHS status is not specified in available documentation.

Selection between substitutes depends on package compatibility requirements and preferred manufacturer sourcing. Both substitutes provide active product status, addressing the obsolescence of the original part.

Frequently Asked Questions (FAQ)

Q: Can 5KP8.0CA-B be used as a direct replacement for 3KP8.0CA-B?

A: Yes. Both parts share identical voltage specifications (8V standoff, 8.89V breakdown, 13.6V clamping) and operating temperature range (-55°C to 175°C). The 5KP8.0CA-B features higher peak pulse current (375A vs. 220.6A) and power dissipation (5000W vs. 3000W), making it suitable for applications requiring equal or greater transient protection. The P600 axial package is identical, requiring no PCB modifications.

Q: What is the difference between 3KP8.0CA-TP and 3KP8.0CA-B?

A: Electrical specifications are identical: 8V standoff voltage, 8.89V breakdown voltage, 13.6V clamping voltage, 220.6A peak pulse current, and 3000W power dissipation. The primary difference is the package variant: 3KP8.0CA-TP uses R-6 axial packaging while 3KP8.0CA-B uses P600 axial packaging. Mechanical compatibility with existing PCB footprints must be verified before substitution.

Q: Why is the 3KP8.0CA-B marked as obsolete?

A: The 3KP8.0CA-B is classified as obsolete by Littelfuse. Active substitutes with equivalent electrical performance are available, including the 5KP8.0CA-B from Littelfuse and the 3KP8.0CA-TP from Micro Commercial Co. Both substitutes maintain the critical voltage and thermal specifications required for general-purpose transient suppression applications.

Q: Are there any compliance differences between the substitute parts?

A: The 3KP8.0CA-B and 5KP8.0CA-B are both ROHS3 compliant. The 3KP8.0CA-TP documentation confirms REACH compliance; RoHS status is not specified. Compliance requirements for your application should be verified against the specific substitute selected.

Q: Can I use 5KP8.0CA-B in a circuit designed for 3KP8.0CA-B without circuit modifications?

A: Yes. The 5KP8.0CA-B maintains identical voltage regulation characteristics and operating temperature range. The higher current and power ratings do not affect circuit operation; they represent improved transient suppression capability. No circuit modifications are required for electrical compatibility.