Equivalent & Substitute Parts for 3KP54CA-B TVS Diode

Part Overview

The 3KP54CA-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage clamping applications. This bidirectional Zener diode operates with a 54V reverse standoff voltage and provides 87.1V maximum clamping voltage at peak pulse current. The component features through-hole P600 axial packaging and is rated for 3000W peak pulse power dissipation across an operating temperature range of -55°C to 175°C.

The 3KP54CA-B currently holds obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component specification.

Substiute Parts

3KP54CA-B

Littelfuse Inc.In Stock: 8423KP54CA-B Datasheet

Current PartRFQ

5KP54CA-B

Littelfuse Inc.In Stock: 9625KP54CA-B Datasheet

DirectRFQ

15KP54CA-TP

Micro Commercial CoIn Stock: 142915KP54CA-TP Datasheet

MFR RecommendedRFQ

3KP54CA-TP

Micro Commercial CoIn Stock: 10863KP54CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3KP54CA-B is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 54V
• Voltage - Breakdown (Min): 60V
• Voltage - Clamping (Max) @ Ipp: 87.1V (tolerance: ±0.4V acceptable)
• Current - Peak Pulse (10/1000µs): 34.4A (or higher rating)
• Operating Temperature Range: -55°C to 175°C (TJ)
• Mounting Type: Through Hole
• Type: Zener
• Bidirectional Channels: 1

Package Considerations: The 3KP54CA-B uses P600 axial packaging. Substitute parts may employ alternative axial package designations (such as R-6) provided mechanical fit and lead spacing remain compatible with the original PCB layout.

The identified substitute parts meet these criteria while offering either equivalent or enhanced performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

5KP54CA-B (Littelfuse Inc.): This part maintains identical voltage specifications and operating temperature range as the 3KP54CA-B while offering enhanced peak pulse current (58.6A versus 34.4A) and increased power dissipation capability (5000W versus 3000W). The 5KP54CA-B holds active product status and ROHS3 compliance. Selection of this part is appropriate for applications where the original 3KP54CA-B specifications are met and higher transient energy absorption is beneficial or required.

15KP54CA-TP (Micro Commercial Co): This part provides the same 54V reverse standoff voltage and 60V minimum breakdown voltage as the 3KP54CA-B. The clamping voltage is 87.5V, within acceptable tolerance of the original 87.1V specification. The 15KP54CA-TP offers significantly higher power dissipation (15000W) and holds active product status with ROHS3 compliance. This part is suitable for applications requiring enhanced transient protection margin or higher energy absorption capacity. Package designation changes from P600 to R-6 axial; mechanical compatibility with PCB layout must be verified.

3KP54CA-TP (Micro Commercial Co): This part provides exact electrical equivalence to the 3KP54CA-B, matching all voltage parameters (54V standoff, 60V breakdown, 87.1V clamping) and peak pulse current (34.4A). Power dissipation and operating temperature range are identical. The 3KP54CA-TP holds active product status and ROHS3 compliance. Package designation changes from P600 to R-6 axial; mechanical compatibility with PCB layout must be verified. This part represents the closest functional equivalent with active availability.

Frequently Asked Questions (FAQ)

Q: Can the 5KP54CA-B be used as a direct replacement for the 3KP54CA-B?

A: Yes. The 5KP54CA-B maintains identical voltage specifications (54V standoff, 87.1V clamping) and operating temperature range. The higher peak pulse current (58.6A) and power dissipation (5000W) represent enhanced capability rather than incompatibility. Both parts use P600 axial packaging, ensuring mechanical compatibility. Selection depends on whether the application benefits from or requires the increased transient energy absorption capacity.

Q: What is the difference between the 3KP54CA-TP and 3KP54CA-B?

A: Both parts provide identical electrical specifications: 54V reverse standoff voltage, 87.1V clamping voltage, and 34.4A peak pulse current. The primary differences are manufacturer (Micro Commercial Co versus Littelfuse Inc.), product status (active versus obsolete), and package designation (R-6 versus P600 axial). Mechanical fit must be verified due to package differences, though both are through-hole axial configurations.

Q: Is the 15KP54CA-TP compatible with the 3KP54CA-B circuit application?

A: The 15KP54CA-TP meets the voltage requirements of the 3KP54CA-B application (54V standoff, 87.5V clamping within tolerance). The significantly higher power dissipation rating (15000W) provides enhanced transient protection margin. Package designation differs (R-6 versus P600 axial); PCB layout compatibility must be confirmed. This part is suitable for applications where increased transient energy absorption is acceptable or beneficial.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts (5KP54CA-B, 15KP54CA-TP, and 3KP54CA-TP) carry ROHS3 compliance certification, matching the original 3KP54CA-B specification.

Q: What should be verified when changing from P600 to R-6 axial packaging?

A: Mechanical compatibility must be confirmed, including lead spacing, component height, and PCB footprint alignment. Both P600 and R-6 are through-hole axial packages; however, dimensional differences may affect board layout. Consult component datasheets for precise mechanical specifications and verify fit within the existing PCB design before implementation.

Q: Can multiple substitute parts be used interchangeably in the same design?

A: The 3KP54CA-TP and 3KP54CA-B are electrically equivalent and may be used interchangeably provided package compatibility is confirmed. The 5KP54CA-B and 15KP54CA-TP offer enhanced performance characteristics and may be substituted where increased transient protection margin is acceptable. All parts maintain identical voltage specifications and operating temperature range, supporting interchangeability within the specified electrical parameters.