3KP54A Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The 3KP54A is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 54V reverse standoff voltage, 87.1V maximum clamping voltage, and 3000W peak pulse power rating in a through-hole P600 axial package. The 3KP54A is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

3KP54A

Littelfuse Inc.In Stock: 9483KP54A Datasheet

Current PartRFQ

5KP54A

Littelfuse Inc.In Stock: 18515KP54A Datasheet

DirectRFQ

3KP54A-TP

Micro Commercial CoIn Stock: 11173KP54A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3KP54A are identified based on strict electrical and mechanical parameter matching within the TVS diode category. The primary substitution criteria are:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 54V
• Voltage - Clamping (Max) @ Ipp: 87.1V
• Unidirectional configuration (1 channel)
• Through-hole axial mounting
• Operating temperature range: -55°C to 175°C
• Zener type TVS diode classification

Acceptable Variation Parameters:

• Current - Peak Pulse: Components with equal or greater current handling capacity
• Power - Peak Pulse: Components with equal or greater power dissipation capability
• Package designation: P600 or equivalent axial through-hole packages (R-6)
• Manufacturer: Alternative qualified manufacturers with identical electrical specifications

Substitutes are grouped into two categories: direct electrical equivalents with identical current and power ratings, and higher-capacity alternatives suitable for applications requiring enhanced transient protection margins.

Parameter Comparison

Engineering Selection Recommendations

5KP54A (Littelfuse Inc.) - Primary Active Substitute

The 5KP54A is the recommended substitute for the obsolete 3KP54A. This component maintains identical voltage specifications (54V reverse standoff, 87.1V clamping) and operating temperature range while providing enhanced transient protection capability through increased current handling (58.6A versus 34.4A) and power dissipation (5000W versus 3000W). The 5KP54A carries Active product status with ROHS3 compliance and is available in the same P600 axial through-hole package. This substitute provides direct functional replacement with improved performance margins.

3KP54A-TP (Micro Commercial Co) - Electrical Equivalent

The 3KP54A-TP provides an exact electrical equivalent with matching current (34.4A) and power (3000W) specifications. This component is manufactured by Micro Commercial Co and maintains all critical voltage parameters and operating temperature range. The primary distinction is the package designation (R-6 versus P600), both of which are axial through-hole configurations. This substitute is suitable for applications where the original performance envelope must be preserved without enhancement. Active product status and ROHS3 compliance are confirmed.

Selection Criteria:

• Choose 5KP54A for new designs or applications requiring enhanced transient protection margins
• Choose 3KP54A-TP for direct replacement requiring identical electrical performance characteristics
• All substitutes maintain ROHS3 compliance and -55°C to 175°C operating temperature specifications
• Verify mechanical fit within PCB layout constraints, particularly regarding package footprint differences between P600 and R-6 designations

Frequently Asked Questions (FAQ)

Q: Can the 5KP54A be used as a direct replacement for the 3KP54A?

A: Yes. The 5KP54A maintains identical voltage specifications (54V reverse standoff, 87.1V clamping voltage) and operating temperature range. The increased current rating (58.6A versus 34.4A) and power dissipation (5000W versus 3000W) provide enhanced protection capability without compromising circuit compatibility. Both components are unidirectional Zener TVS diodes in through-hole axial packages.

Q: What is the difference between the P600 and R-6 packages?

A: Both P600 and R-6 are axial through-hole package designations for TVS diodes. The 3KP54A uses P600 packaging, while the 3KP54A-TP uses R-6 packaging. Both are suitable for through-hole PCB mounting. Verify mechanical compatibility with existing PCB footprints before selection.

Q: Are all substitute parts RoHS compliant?

A: Yes. The 5KP54A and 3KP54A-TP are both ROHS3 compliant, matching the compliance status of the original 3KP54A component.

Q: Why is the 3KP54A listed as obsolete?

A: The 3KP54A is classified as obsolete by Littelfuse Inc. The 5KP54A serves as the active product line continuation, offering enhanced specifications while maintaining backward compatibility with the original voltage and temperature parameters.

Q: Can I use the 3KP54A-TP in applications originally designed for the 3KP54A?

A: Yes. The 3KP54A-TP provides identical electrical specifications (34.4A peak pulse current, 3000W power dissipation, 87.1V clamping voltage) and maintains the same operating temperature range. Verify package footprint compatibility with your PCB design before implementation.

Q: What applications are these TVS diodes suitable for?

A: These components are classified for general-purpose transient voltage suppression applications. They are not rated for power line protection. Verify application-specific requirements against the 54V reverse standoff voltage and 3000W to 5000W power dissipation specifications.