3KP110 Equivalent & Substitute Parts

Part Overview

The 3KP110 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 110V reverse standoff voltage with a 185.85V maximum clamping voltage and 16.9A peak pulse current capability in a through-hole P600 axial package. The product is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system maintenance, repairs, and new designs requiring equivalent protection characteristics.

Substiute Parts

3KP110

Littelfuse Inc.In Stock: 8483KP110 Datasheet

Current PartRFQ

5KP110A

EIC SEMICONDUCTOR INC.In Stock: 42785KP110A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP110 is determined by strict alignment of electrical and mechanical parameters within the TVS diode category. The primary substitution criteria are:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 110V
• Unidirectional topology (single channel)
• Through-hole axial mounting configuration
• General-purpose transient protection application

Allowable Parameter Variations:

• Voltage - Clamping (Max) @ Ipp: Substitute must not exceed the original specification to ensure equivalent or superior protection performance
• Current - Peak Pulse (10/1000µs): Substitute may equal or exceed the original specification
• Power - Peak Pulse: Substitute may equal or exceed the original specification
• Operating Temperature Range: Substitute must support the application's thermal requirements

The 5KP110A qualifies as a direct substitute based on matching reverse standoff voltage (110V), identical unidirectional channel configuration, compatible through-hole axial package (D-6), and active product status with enhanced electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 5KP110A is a qualified substitute for the obsolete 3KP110 based on the following engineering criteria:

Electrical Compatibility: Both components maintain identical reverse standoff voltage (110V) and unidirectional topology, ensuring equivalent circuit protection function. The 5KP110A demonstrates superior electrical performance with lower clamping voltage (177V vs. 185.85V), higher peak pulse current capability (28A vs. 16.9A), and increased power dissipation capacity (5kW vs. 3kW).

Mechanical Compatibility: Both components utilize through-hole axial mounting configuration, enabling direct PCB footprint compatibility with appropriate lead spacing verification.

Compliance & Availability: The 5KP110A holds active product status with ROHS3 compliance certification, ensuring long-term supply chain availability and regulatory alignment. The 3KP110 obsolete status necessitates substitution for new designs and ongoing system support.

Thermal Consideration: The 5KP110A operates within -55°C to 150°C temperature range, which is suitable for most general-purpose applications. Applications requiring operation above 150°C junction temperature must evaluate thermal requirements against the substitute's maximum specification.

Frequently Asked Questions (FAQ)

Q: Can the 5KP110A directly replace the 3KP110 in existing designs?

A: Yes. Both components share identical reverse standoff voltage (110V), unidirectional channel configuration, and through-hole axial mounting topology. The 5KP110A provides equivalent or superior protection performance. Physical lead spacing and package dimensions (P600 vs. D-6) must be verified for PCB compatibility.

Q: What are the key differences between the 3KP110 and 5KP110A?

A: The 5KP110A offers enhanced electrical performance with lower clamping voltage (177V vs. 185.85V), higher peak pulse current (28A vs. 16.9A), and greater power dissipation (5kW vs. 3kW). The 5KP110A operates to 150°C maximum junction temperature compared to 175°C for the 3KP110. The 5KP110A is actively manufactured while the 3KP110 is obsolete.

Q: Are there package compatibility concerns between P600 and D-6 axial packages?

A: Both packages are through-hole axial configurations suitable for PCB mounting. Physical dimensions and lead spacing differ between P600 and D-6 packages. PCB layout verification is required to confirm footprint compatibility before component substitution.

Q: Does the 5KP110A meet the same compliance standards as the 3KP110?

A: Yes. Both components are ROHS3 compliant. The 5KP110A includes REACH compliance information available upon request from the manufacturer.

Q: What is the impact of the 5KP110A's lower maximum clamping voltage?

A: The 5KP110A's lower clamping voltage (177V vs. 185.85V) provides improved transient voltage suppression performance, resulting in lower peak voltage stress on protected circuitry. This represents an engineering advantage for component protection.

Q: Is the 5KP110A suitable for applications requiring operation above 150°C?

A: The 5KP110A maximum junction temperature is 150°C. Applications requiring sustained operation above this temperature must evaluate alternative components or thermal management strategies to maintain the substitute within specified operating limits.