3KP16A Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The 3KP16A is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This component features a 16V reverse standoff voltage with a 26V maximum clamping voltage and 115.4A peak pulse current capability in a through-hole P600 axial package. The 3KP16A is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

3KP16A

LittelfuseIn Stock: 10083KP16A Datasheet

Current PartRFQ

5KP16A

Littelfuse Inc.In Stock: 48195KP16A Datasheet

DirectRFQ

3KP16A-TP

Micro Commercial CoIn Stock: 10633KP16A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the 3KP16A must maintain electrical and mechanical compatibility based on the following critical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 16V
• Voltage - Breakdown (Min): 17.8V
• Voltage - Clamping (Max) @ Ipp: 26V
• Unidirectional Channels: 1
• Type: Zener

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: P600 or equivalent axial package
• Operating Temperature Range: -55°C ~ 175°C (TJ)

Compliance Criteria:

• RoHS3 Compliant
• Moisture Sensitivity Level (MSL): 1

Substitutes are grouped based on whether they maintain identical electrical specifications while potentially offering different power ratings or product status classifications. The 5KP16A represents an enhanced-performance variant with higher peak pulse current (196.2A) and power dissipation (5000W), while the 3KP16A-TP provides an active-status equivalent with identical electrical performance.

Parameter Comparison

Engineering Selection Recommendations

5KP16A (Littelfuse Inc.) - Active Status Substitute: The 5KP16A maintains identical voltage specifications (16V standoff, 26V clamping) and operating temperature range as the 3KP16A while offering enhanced current handling (196.2A vs. 115.4A) and power dissipation (5000W vs. 3000W). This component is currently in active production status with ROHS3 compliance and MSL 1 rating. Selection of the 5KP16A is appropriate for applications where the original 3kW power rating is sufficient but where active product status and higher transient current capability provide design margin.

3KP16A-TP (Micro Commercial Co) - Direct Electrical Equivalent: The 3KP16A-TP provides an exact electrical match to the original 3KP16A with identical voltage specifications, current rating (115.4A), and power dissipation (3000W). This component is in active production status. The package designation differs (R-6 vs. P600), requiring verification of mechanical fit in existing PCB layouts. Selection of the 3KP16A-TP is appropriate for direct replacement applications where package compatibility can be confirmed.

Frequently Asked Questions (FAQ)

Q: Can the 5KP16A be used as a direct replacement for the 3KP16A?

A: The 5KP16A is electrically compatible with the 3KP16A for all voltage parameters (16V standoff, 26V clamping). Both components are unidirectional Zener TVS diodes with identical operating temperature ranges and through-hole axial mounting. The 5KP16A offers higher peak pulse current (196.2A vs. 115.4A) and power dissipation (5000W vs. 3000W), making it suitable for applications requiring the original 3kW rating. Package compatibility (P600 axial) is maintained.

Q: What is the difference between the 3KP16A-TP and the original 3KP16A?

A: The 3KP16A-TP maintains identical electrical specifications to the 3KP16A: 16V reverse standoff voltage, 26V clamping voltage, 115.4A peak pulse current, and 3000W power dissipation. The primary difference is product status: the 3KP16A-TP is in active production by Micro Commercial Co, while the original 3KP16A is obsolete. The package designation differs (R-6 vs. P600), requiring mechanical verification for PCB compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: The 5KP16A is confirmed ROHS3 compliant with MSL 1 rating. The 3KP16A-TP RoHS and MSL status are not specified in the provided data. Verification with the manufacturer is required for applications with specific compliance requirements.

Q: What are the key electrical parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: Voltage - Reverse Standoff (16V), Voltage - Breakdown (17.8V minimum), Voltage - Clamping (26V maximum), unidirectional channel configuration (1 channel), and Zener type classification. All listed substitutes maintain these parameters. Peak pulse current and power dissipation may vary without affecting voltage regulation performance.

Q: Can the 3KP16A be used in new designs?

A: The 3KP16A is classified as obsolete and is not recommended for new designs. The 5KP16A (active status, enhanced performance) or 3KP16A-TP (active status, direct electrical equivalent) are appropriate selections for new applications requiring 16V TVS protection.