3KP16 Equivalent & Substitute Parts

Part Overview

The 3KP16 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. It features a 16V reverse standoff voltage with a 27.3V maximum clamping voltage and 115.4A peak pulse current capability in a P600 axial through-hole package. The 3KP16 is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production requirements.

Substiute Parts

3KP16

Littelfuse Inc.In Stock: 10343KP16 Datasheet

Current PartRFQ

5KP16A

Littelfuse Inc.In Stock: 48195KP16A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP16 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Voltage - Reverse Standoff (Typ): 16V
• Unidirectional topology (single channel)
• Zener type TVS diode
• General-purpose application classification

Mechanical Compatibility Requirements:

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

Environmental & Compliance Requirements:

• Operating Temperature Range: -55°C ~ 175°C (TJ)
• RoHS3 Compliance
• MSL Rating: 1 (Unlimited)

The 5KP16A qualifies as a direct substitute based on matching reverse standoff voltage (16V), unidirectional zener topology, P600 axial package, through-hole mounting, identical operating temperature range, and equivalent RoHS3 compliance. The 5KP16A is an active product with enhanced power dissipation capability (5000W vs. 3000W), making it suitable for applications requiring the same voltage protection with improved thermal performance.

Parameter Comparison

Engineering Selection Recommendations

The 5KP16A is the appropriate substitute for the obsolete 3KP16. Both devices maintain identical reverse standoff voltage (16V), unidirectional zener topology, and P600 axial through-hole package configuration. The 5KP16A is an active product with current manufacturing status, ensuring long-term availability and supply chain continuity.

The 5KP16A provides enhanced peak pulse current handling (196.2A vs. 115.4A) and increased power dissipation capability (5000W vs. 3000W) while maintaining the same voltage protection characteristics. The clamping voltage of the 5KP16A (26V) is marginally lower than the 3KP16 (27.3V), providing equivalent or improved transient suppression performance.

Both devices comply with ROHS3 standards and feature MSL Rating 1 (Unlimited), ensuring compatibility with standard manufacturing and storage conditions. The identical operating temperature range (-55°C ~ 175°C) supports direct substitution in existing thermal environments.

Frequently Asked Questions (FAQ)

Q: Can the 5KP16A directly replace the 3KP16 in existing designs?

A: Yes. The 5KP16A maintains the critical electrical parameters (16V reverse standoff voltage, unidirectional zener topology) and mechanical specifications (P600 axial package, through-hole mounting) required for direct substitution. The enhanced power rating of the 5KP16A does not create compatibility issues in applications designed for the 3KP16.

Q: What is the significance of the different power ratings (3000W vs. 5000W)?

A: The 5KP16A's higher power dissipation rating (5000W) indicates improved thermal performance and transient energy handling capability. This enhancement does not affect voltage protection characteristics and provides additional design margin for transient suppression applications.

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

A: No. Both the 3KP16 and 5KP16A are ROHS3 compliant with identical MSL Rating 1 (Unlimited). Compliance certifications are equivalent, supporting direct substitution in regulated manufacturing environments.

Q: Why is the 3KP16 classified as obsolete?

A: The 3KP16 has been discontinued by Littelfuse Inc. The 5KP16A represents the active product line continuation with equivalent voltage protection specifications and enhanced performance characteristics.

Q: Are the packaging and mounting specifications identical?

A: Yes. Both devices use the P600 axial package with through-hole mounting configuration. No PCB layout modifications or mechanical redesign is required for substitution.