Equivalent & Substitute Parts for 3KP7.0-B TVS Diode

Part Overview

The 3KP7.0-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This component features a 7V reverse standoff voltage with a 12.6V maximum clamping voltage and 250A peak pulse current capability in a through-hole P600 axial package. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar electrical characteristics and mechanical compatibility.

Substiute Parts

3KP7.0-B

Littelfuse Inc.In Stock: 8533KP7.0-B Datasheet

Current PartRFQ

5KP7.0A-B

Littelfuse Inc.In Stock: 7565KP7.0A-B Datasheet

DirectRFQ

1.5KE8.2A-TP

Micro Commercial CoIn Stock: 17661.5KE8.2A-TP Datasheet

MFR RecommendedRFQ

3KP7.0A-TP

Micro Commercial CoIn Stock: 12723KP7.0A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 3KP7.0-B is determined by the following critical parameters: reverse standoff voltage (7V nominal), clamping voltage range (12V–12.6V), peak pulse current capability (250A minimum), power dissipation (3kW minimum), through-hole axial mounting, and operating temperature range (-55°C to 175°C). Substitute parts must maintain electrical equivalence within these specifications and comply with RoHS3 requirements.

The substitute parts are grouped as follows:

Direct Electrical Equivalent (Higher Power Rating): The 5KP7.0A-B maintains identical voltage parameters but offers increased peak pulse current (425A) and power dissipation (5kW), making it suitable for applications requiring enhanced transient protection margin.

Manufacturer-Recommended Alternatives: The 3KP7.0A-TP and 1.5KE8.2A-TP provide electrical compatibility with variations in package form factor and power rating, accommodating different circuit board layouts and thermal management requirements.

Parameter Comparison

Engineering Selection Recommendations

5KP7.0A-B: Select this substitute when the application circuit can accommodate increased power dissipation and peak pulse current. This part is manufactured by Littelfuse Inc. (original manufacturer), maintains identical voltage specifications, and is in active production status with ROHS3 compliance. The P600 package provides direct mechanical compatibility with the original 3KP7.0-B footprint.

3KP7.0A-TP: This manufacturer-recommended alternative from Micro Commercial Co maintains identical electrical ratings (250A peak pulse, 3kW power dissipation) and operating temperature range. The R-6 package requires board layout verification for mechanical fit. Product status is active.

1.5KE8.2A-TP: This option is suitable for applications where peak pulse current and power dissipation requirements are lower than the original specification. The DO-201AE package differs from the original P600 form factor and requires mechanical compatibility assessment. This part is in active production with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the 5KP7.0A-B directly replace the 3KP7.0-B without circuit modification?

A: Yes. The 5KP7.0A-B maintains identical reverse standoff voltage (7V), comparable clamping voltage (12V vs. 12.6V), and uses the same P600 axial package. The increased peak pulse current (425A vs. 250A) and power dissipation (5kW vs. 3kW) provide enhanced protection margin without requiring circuit changes.

Q: What are the package differences between substitute options?

A: The 3KP7.0-B uses a P600 axial package. The 5KP7.0A-B maintains this package. The 3KP7.0A-TP uses an R-6 axial package, and the 1.5KE8.2A-TP uses a DO-201AE axial package. All are through-hole axial configurations but differ in physical dimensions and board layout requirements.

Q: Is the 1.5KE8.2A-TP suitable as a direct replacement?

A: The 1.5KE8.2A-TP provides electrical compatibility in voltage parameters (7.02V standoff, 12.1V clamping) but offers reduced power dissipation (1.5kW vs. 3kW). Selection depends on whether the application circuit requires the full 3kW power rating. The DO-201AE package requires mechanical compatibility verification.

Q: Are all substitute parts RoHS3 compliant?

A: The 5KP7.0A-B and 1.5KE8.2A-TP are confirmed ROHS3 compliant. The 3KP7.0A-TP RoHS status is not specified in available documentation.

Q: What is the significance of product status (Active vs. Obsolete)?

A: The original 3KP7.0-B is obsolete and no longer manufactured. All substitute parts listed are in active production, ensuring long-term availability and supply chain continuity for new designs and system support.