3KP8.0C-B Equivalent & Substitute Parts

Part Overview

The 3KP8.0C-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features an 8V reverse standoff voltage with a 14.28V maximum clamping voltage and 220.6A peak pulse current capability in a through-hole P600 axial package. The product is currently classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure ongoing component availability for production and field service applications.

Substiute Parts

3KP8.0C-B

Littelfuse Inc.In Stock: 11743KP8.0C-B Datasheet

Current PartRFQ

5KP8.0CA-B

LittelfuseIn Stock: 11725KP8.0CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP8.0C-B is determined by the following critical electrical and mechanical parameters:

Voltage Parameters: The reverse standoff voltage (8V typical) and breakdown voltage range (8.42V minimum) establish the primary voltage class. Substitute components must maintain the same 8V standoff voltage specification to ensure proper circuit protection thresholds.

Current and Power Ratings: The peak pulse current (220.6A) and peak pulse power (3000W) define the transient energy handling capability. Substitute parts may exceed these ratings while maintaining the same voltage class, as higher current and power ratings provide equivalent or enhanced protection performance.

Package and Mounting: The P600 axial through-hole package is a mechanical requirement for board-level compatibility. Substitute components must use identical packaging to ensure direct replacement without circuit board redesign.

Compliance and Status: Active product status and ROHS3 compliance are required for new designs and ongoing supply chain viability.

Parameter Comparison

Engineering Selection Recommendations

The 5KP8.0CA-B is a direct functional substitute for the obsolete 3KP8.0C-B. Both components share identical voltage class specifications (8V reverse standoff), identical package geometry (P600 axial through-hole), and identical operating temperature range (-55°C to 175°C). The 5KP8.0CA-B is currently in active production status, ensuring supply chain availability and compliance with current manufacturing standards.

The 5KP8.0CA-B provides enhanced performance characteristics relative to the 3KP8.0C-B: peak pulse current increases from 220.6A to 375A, and peak pulse power increases from 3000W to 5000W. The clamping voltage is lower (13.6V versus 14.28V), which provides improved transient suppression performance. The breakdown voltage specification is slightly higher (8.89V minimum versus 8.42V minimum), remaining within the same voltage class tolerance.

Both components maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), supporting deployment in standard manufacturing and storage environments.

Frequently Asked Questions (FAQ)

Q: Can the 5KP8.0CA-B directly replace the 3KP8.0C-B without circuit modifications?

A: Yes. Both components share identical voltage class (8V standoff), identical package (P600 axial through-hole), and identical operating temperature range. Direct board-level substitution is supported without circuit redesign.

Q: What is the significance of the higher peak pulse current in the 5KP8.0CA-B?

A: The 5KP8.0CA-B is rated for 375A peak pulse current compared to 220.6A in the 3KP8.0C-B. This higher current rating indicates enhanced transient energy handling capability within the same voltage class and package, providing equivalent or superior protection performance.

Q: Why is the clamping voltage lower in the 5KP8.0CA-B?

A: The 5KP8.0CA-B achieves a maximum clamping voltage of 13.6V compared to 14.28V in the 3KP8.0C-B. Both values remain within acceptable circuit protection parameters for 8V standoff voltage applications. The lower clamping voltage in the substitute part represents improved transient suppression characteristics.

Q: Are there any compliance or certification differences between these parts?

A: Both the 3KP8.0C-B and 5KP8.0CA-B are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity). The primary difference is product status: the 3KP8.0C-B is obsolete, while the 5KP8.0CA-B is active production, ensuring ongoing availability and compliance with current manufacturing standards.

Q: What is the P600 package specification?

A: P600 is an axial through-hole package for discrete diodes. Both the main part and substitute use this identical package geometry, enabling direct mechanical and electrical compatibility on printed circuit boards without layout modifications.