Equivalent & Substitute Parts for 3KP54A-B TVS Diode

Part Overview

The 3KP54A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage transient protection applications. This component features a 54V reverse standoff voltage with an 87.1V maximum clamping voltage and 34.4A peak pulse current capability in a through-hole P600 axial package. The 3KP54A-B is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Suitable alternatives must maintain identical electrical performance parameters while offering active product status and current manufacturing availability.

Substiute Parts

3KP54A-B

Littelfuse Inc.In Stock: 8833KP54A-B Datasheet

Current PartRFQ

5KP54A-B

LittelfuseIn Stock: 10165KP54A-B Datasheet

DirectRFQ

3KP54A-TP

Micro Commercial CoIn Stock: 11173KP54A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3KP54A-B are qualified based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 54V
• Voltage - Breakdown (Min): 60V
• Voltage - Clamping (Max) @ Ipp: 87.1V
• Operating Temperature Range: -55°C to 175°C (TJ)
• Type: Zener, Unidirectional (1 channel)

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: P600 or R-6 Axial

Functional Compatibility Criteria:

• Applications: General Purpose
• Peak Pulse Current: 34.4A minimum
• Peak Pulse Power: 3000W minimum

Substitutes are grouped into two categories: direct electrical equivalents with identical performance specifications, and manufacturer-recommended alternatives that maintain functional compatibility within the same electrical class.

Parameter Comparison

Engineering Selection Recommendations

5KP54A-B (Littelfuse): This direct substitute maintains all critical electrical parameters identical to the 3KP54A-B while offering active product status and higher peak pulse current (58.6A) and power (5000W) ratings. The 5KP54A-B is ROHS3 compliant with MSL 1 rating, ensuring regulatory compliance and manufacturing reliability. The identical P600 axial package enables direct mechanical substitution. This part is recommended for applications requiring the highest reliability and longest product lifecycle support.

3KP54A-TP (Micro Commercial Co): This manufacturer-recommended alternative provides electrical equivalence with identical voltage parameters, peak pulse current (34.4A), and power (3000W) ratings. The 3KP54A-TP maintains the same operating temperature range and through-hole mounting configuration. The R-6 axial package differs from the P600 package but remains compatible for through-hole PCB mounting. This part is recommended for cost-optimized designs where package footprint variation is acceptable and electrical performance requirements are identical to the original specification.

Both substitutes maintain active product status, ensuring long-term availability and manufacturing support compared to the obsolete 3KP54A-B.

Frequently Asked Questions (FAQ)

Q: Can the 5KP54A-B replace the 3KP54A-B in existing designs?

A: Yes. The 5KP54A-B maintains identical electrical specifications (54V standoff, 87.1V clamping, -55 to 175°C operating range) and uses the same P600 axial through-hole package. The higher peak pulse current (58.6A vs 34.4A) and power rating (5000W vs 3000W) provide enhanced transient protection capability without affecting circuit compatibility.

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

A: Both P600 and R-6 are axial through-hole packages formats. The 3KP54A-TP uses the R-6 package while the 3KP54A-B uses P600. Both are compatible with standard through-hole PCB mounting. Package selection depends on PCB layout constraints and lead spacing requirements specific to your application.

Q: Why is the 3KP54A-B classified as obsolete?

A: The 3KP54A-B is no longer in active production. The 5KP54A-B and 3KP54A-TP are actively manufactured alternatives that provide equivalent or superior electrical performance with current manufacturing support and regulatory compliance.

Q: Are all substitute parts RoHS compliant?

A: The 5KP54A-B is ROHS3 compliant. The 3KP54A-TP compliance status is not specified in the provided data. Verify RoHS compliance requirements with your specific application and regulatory requirements before final component selection.

Q: Can I use the 5KP54A-B in applications requiring exactly 3000W peak pulse power?

A: Yes. The 5KP54A-B is rated for 5000W peak pulse power, which exceeds the 3000W requirement. Higher power ratings provide additional design margin and do not negatively affect circuit operation when electrical voltage parameters remain identical.