3KP8.0 Equivalent & Substitute Parts

Part Overview

The 3KP8.0 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 14.28V maximum clamping voltage and 220.6A peak pulse current capability in a P600 axial through-hole package. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

3KP8.0

Littelfuse Inc.In Stock: 10473KP8.0 Datasheet

Current PartRFQ

5KP8.0A

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

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): Must match 8V
• Unidirectional Channels: Must be 1
• Type: Must be Zener
• Operating Temperature Range: Must support -55°C ~ 175°C (TJ)

Mechanical Compatibility Criteria:

• Mounting Type: Must be Through Hole
• Package / Case: Must be P600, Axial

Compliance Criteria:

• RoHS Status: Must be ROHS3 Compliant
• Moisture Sensitivity Level (MSL): Must be 1 (Unlimited)

The 5KP8.0A meets all substitution criteria. While it exhibits higher peak pulse current (375A versus 220.6A) and greater peak pulse power (5000W versus 3000W), these represent enhanced performance characteristics within the same electrical class and mechanical form factor. The clamping voltage differential (13.6V versus 14.28V) remains within acceptable tolerance for general-purpose transient protection applications.

Parameter Comparison

Engineering Selection Recommendations

The 5KP8.0A is the direct substitute for the obsolete 3KP8.0. Both components are manufactured by Littelfuse Inc. and maintain identical mechanical compatibility through the P600 axial through-hole package. Both achieve ROHS3 compliance and MSL 1 rating, ensuring regulatory and environmental compatibility.

The 5KP8.0A carries Active product status, providing long-term availability and supply chain stability compared to the Obsolete 3KP8.0. The enhanced electrical performance of the 5KP8.0A (375A peak pulse current and 5000W peak pulse power versus 220.6A and 3000W respectively) provides additional transient protection margin without requiring circuit redesign or PCB modifications.

Frequently Asked Questions (FAQ)

Q: Can the 5KP8.0A be used as a direct replacement for the 3KP8.0 in existing designs?

A: Yes. Both components share identical reverse standoff voltage (8V), unidirectional channel configuration, operating temperature range (-55°C ~ 175°C), and P600 axial through-hole package. No circuit modifications or PCB layout changes are required.

Q: What is the significance of the higher peak pulse current and power ratings in the 5KP8.0A?

A: The 5KP8.0A provides enhanced transient suppression capability with 375A peak pulse current and 5000W peak pulse power compared to the 3KP8.0's 220.6A and 3000W. This represents improved performance within the same electrical class and package form factor.

Q: Are there compliance differences between the 3KP8.0 and 5KP8.0A?

A: No. Both components are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Both carry EAR99 ECCN classification and identical HTSUS codes.

Q: Why is the 3KP8.0 marked as Obsolete?

A: The 3KP8.0 has reached end-of-life status. The 5KP8.0A is the active equivalent from Littelfuse Inc., offering superior performance characteristics and ongoing supply availability.

Q: Does the clamping voltage difference (14.28V versus 13.6V) affect circuit compatibility?

A: No. The 5KP8.0A's lower maximum clamping voltage (13.6V) provides tighter voltage regulation compared to the 3KP8.0 (14.28V), which is beneficial for transient protection applications. Both values remain within acceptable operating parameters for general-purpose TVS applications.