Equivalent & Substitute Parts for 3KP7.0A TVS Diode

Part Overview

The 3KP7.0A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 7V reverse standoff voltage, 12V maximum clamping voltage, and 250A peak pulse current capability with 3000W peak pulse power dissipation. The part is mounted through-hole in a P600 axial package and operates across the temperature range of -55°C to 175°C.

The 3KP7.0A is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. Substitute components must maintain electrical compatibility across critical parameters including voltage ratings, current handling capacity, and thermal characteristics while accommodating available packaging options.

Substiute Parts

3KP7.0A

Littelfuse Inc.In Stock: 9593KP7.0A Datasheet

Current PartRFQ

5KP7.0A

Littelfuse Inc.In Stock: 32705KP7.0A Datasheet

DirectRFQ

3KP7.0A-TP

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

DirectRFQ

1.5KE8.2A-TP

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3KP7.0A is determined by the following critical electrical and mechanical parameters:

Voltage Compatibility: Reverse standoff voltage must be 7V (±tolerance), breakdown voltage minimum 7.78V, and maximum clamping voltage 12V (±tolerance). These parameters ensure the TVS diode triggers at the correct transient event threshold and clamps to safe voltage levels.

Current and Power Handling: Peak pulse current capability and peak pulse power dissipation determine the component's ability to suppress transient events. Substitute parts must support the application's transient energy requirements.

Package and Mounting: Through-hole axial packages (P600, R-6, or DO-201AE) are mechanically compatible with the original design footprint, though PCB layout verification is required for different package geometries.

Temperature Range: Operating temperature range of -55°C to 175°C must be maintained to ensure reliability across the application's thermal environment.

Product Status and Compliance: Active product status ensures ongoing availability and manufacturing support. RoHS3 compliance and REACH status confirm regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

5KP7.0A (Littelfuse Inc.): This part is the direct electrical equivalent with identical voltage ratings and temperature range. It maintains the same P600 axial package and offers superior peak pulse current (425A) and power dissipation (5000W) compared to the main part. Active product status ensures long-term availability. This substitute is suitable for applications requiring equal or greater transient suppression capability.

3KP7.0A-TP (Micro Commercial Co): This part provides electrical equivalence with matching voltage ratings, current capability (250A), and power dissipation (3000W). The R-6 axial package differs from the P600 package; PCB layout and mechanical clearance verification is required. Active product status supports ongoing procurement. This substitute is appropriate for designs where package geometry can be accommodated.

1.5KE8.2A-TP (Micro Commercial Co): This part offers voltage ratings within acceptable tolerance (7.02V standoff, 12.1V clamping) and maintains the same operating temperature range. Peak pulse power is reduced to 1500W, and peak pulse current is not specified. The DO-201AE axial package differs from the original P600 package. Active product status and RoHS3 compliance are confirmed. This substitute is suitable only for applications with lower transient energy requirements and where package geometry is compatible.

Frequently Asked Questions (FAQ)

Q: Can the 5KP7.0A replace the 3KP7.0A in all applications?

A: Yes, the 5KP7.0A is electrically equivalent with identical voltage ratings and temperature range. It maintains the same P600 axial package and provides enhanced current and power handling capability. No design modifications are required.

Q: What is the difference between the 3KP7.0A-TP and the original 3KP7.0A?

A: The 3KP7.0A-TP is electrically equivalent with matching voltage, current, and power specifications. The primary difference is the package: R-6 axial versus P600 axial. PCB layout verification is necessary to confirm mechanical compatibility with the original footprint.

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

A: The 1.5KE8.2A-TP maintains voltage compatibility within acceptable tolerance and the same operating temperature range. However, peak pulse power is reduced to 1500W compared to 3000W for the main part. This substitute is appropriate only for applications with lower transient energy requirements. The DO-201AE package differs from P600 and requires layout verification.

Q: What parameters must remain constant for a valid substitution?

A: Voltage ratings (reverse standoff, breakdown, and clamping) and operating temperature range are the primary electrical parameters that must remain constant or within acceptable tolerance. Through-hole axial package compatibility must be verified for mechanical fit. Peak pulse current and power dissipation must meet or exceed application requirements.

Q: Are all substitute parts RoHS3 compliant?

A: The 5KP7.0A and 1.5KE8.2A-TP are confirmed RoHS3 compliant. The 3KP7.0A-TP RoHS status is not specified in the provided data.

Q: What is the inventory status of these substitute parts?

A: 5KP7.0A: 3200 pcs in stock; 3KP7.0A-TP: 1191 pcs in stock; 1.5KE8.2A-TP: 1751 pcs in stock. All substitutes are available as new original components.