3KP17 Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The 3KP17 is a unidirectional Zener-type transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage clamping applications. This component features a 17V reverse standoff voltage with a 28.98V maximum clamping voltage and 108.7A peak pulse current capability in a P600 axial through-hole package. The 3KP17 is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production support.

Substiute Parts

3KP17

Littelfuse Inc.In Stock: 7883KP17 Datasheet

Current PartRFQ

5KP17A

Littelfuse Inc.In Stock: 36315KP17A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP17 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Reverse standoff voltage: 17V (nominal)
• Unidirectional topology: Single channel Zener-type TVS
• Package type: P600 axial through-hole configuration
• Operating temperature range: -55°C to 175°C

Substitution Logic: The 5KP17A qualifies as a direct substitute based on matching reverse standoff voltage (17V), identical unidirectional channel configuration, identical P600 axial package, and overlapping operating temperature range. The 5KP17A represents an active product with higher power dissipation capability (5000W vs. 3000W), making it suitable for applications requiring the same voltage protection with enhanced transient energy handling.

Parameter Comparison

Engineering Selection Recommendations

The 5KP17A is the appropriate substitute for the obsolete 3KP17 based on the following factors:

Product Status: The 3KP17 is classified as obsolete, while the 5KP17A maintains active product status with current manufacturing support and availability.

Compliance Alignment: Both components maintain ROHS3 compliance and identical moisture sensitivity classification (MSL 1), ensuring regulatory and environmental compatibility in existing supply chains.

Electrical Equivalence: Both parts share identical reverse standoff voltage (17V), breakdown voltage range, and unidirectional Zener topology, confirming functional compatibility in voltage protection circuits.

Package Compatibility: Identical P600 axial through-hole packaging enables direct mechanical substitution without PCB redesign.

Enhanced Capability: The 5KP17A provides superior transient energy handling (5000W vs. 3000W) and higher peak pulse current (184.8A vs. 108.7A), offering improved protection margins in the same physical footprint.

Frequently Asked Questions (FAQ)

Q: Can the 5KP17A be used as a direct replacement for the 3KP17 in existing designs?

A: Yes. Both components share identical reverse standoff voltage (17V), unidirectional Zener topology, and P600 axial through-hole package configuration. The 5KP17A is mechanically and electrically compatible for direct substitution.

Q: What are the key differences between the 3KP17 and 5KP17A?

A: The primary differences are product status (obsolete vs. active), power dissipation capability (3000W vs. 5000W), peak pulse current (108.7A vs. 184.8A), and clamping voltage (28.98V vs. 27.6V). The 5KP17A provides enhanced transient protection in the same package.

Q: Are there any package or mounting differences between these parts?

A: No. Both components use the P600 axial through-hole package, enabling identical PCB mounting and layout without modification.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 3KP17 and 5KP17A are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level), meeting identical regulatory and environmental requirements.

Q: What is the operating temperature range for both components?

A: Both parts operate across the identical temperature range of -55°C to 175°C (junction temperature), ensuring thermal compatibility in the same application environment.