3KP64CA-B Equivalent & Substitute Parts

Part Overview

The 3KP64CA-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 64V reverse standoff voltage with a 103V maximum clamping voltage and 29.1A peak pulse current capability in a through-hole P600 axial package. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

3KP64CA-B

Littelfuse Inc.In Stock: 9503KP64CA-B Datasheet

Current PartRFQ

5KP64CA-B

Littelfuse Inc.In Stock: 11275KP64CA-B Datasheet

DirectRFQ

3KP64CA-TP

Micro Commercial CoIn Stock: 11003KP64CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3KP64CA-B are identified based on strict electrical and mechanical parameter matching within the TVS diode category. The primary substitution criteria are:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 64V
• Voltage - Breakdown (Min): 71.1V
• Voltage - Clamping (Max) @ Ipp: 103V
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Type: Zener, Bidirectional

Mechanical Parameters (Must Match):

• Mounting Type: Through Hole
• Package / Case: Axial configuration
• Bidirectional Channels: 1

Acceptable Variations:

• Current - Peak Pulse (10/1000µs): May exceed the original 29.1A specification
• Power - Peak Pulse: May exceed the original 3000W specification
• Product Status: Active status preferred for long-term availability
• Manufacturer: Different manufacturer acceptable if electrical and mechanical parameters align

Parameter Comparison

Engineering Selection Recommendations

5KP64CA-B (Littelfuse Inc.): This substitute is manufactured by the original equipment manufacturer and maintains active product status. It provides identical electrical protection characteristics with enhanced current and power handling capabilities (49.5A peak pulse, 5000W peak power versus 29.1A and 3000W). The P600 axial package ensures direct mechanical compatibility. ROHS3 compliance is maintained. This part is suitable for direct substitution with the added benefit of higher transient energy absorption capacity.

3KP64CA-TP (Micro Commercial Co): This substitute maintains electrical equivalence with identical voltage ratings, current specifications (29.1A), and power ratings (3000W). The R-6 axial package differs from the original P600 package but remains a through-hole axial configuration. Active product status ensures long-term availability. This option is suitable for applications where the original electrical and thermal performance specifications are sufficient and package footprint differences are acceptable.

Frequently Asked Questions (FAQ)

Q: Can the 5KP64CA-B be used as a direct replacement for the 3KP64CA-B?

A: Yes. The 5KP64CA-B provides identical voltage protection characteristics (64V standoff, 103V clamping) and maintains the same P600 axial package. The higher current rating (49.5A versus 29.1A) and power rating (5000W versus 3000W) represent enhanced capabilities that do not compromise compatibility. The circuit will function identically or with improved transient suppression margin.

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

A: Both are through-hole axial packages for TVS diodes. The P600 and R-6 designations refer to different package body dimensions and lead configurations. While electrically equivalent, physical board layout and component spacing may differ. Verify PCB footprint compatibility before selecting the 3KP64CA-TP.

Q: Why is the 3KP64CA-B obsolete?

A: Product obsolescence is determined by the manufacturer based on market demand and product lifecycle decisions. The 5KP64CA-B and 3KP64CA-TP remain active alternatives that provide equivalent or enhanced functionality.

Q: Are all substitute parts RoHS compliant?

A: The 5KP64CA-B is confirmed ROHS3 compliant. The 3KP64CA-TP RoHS status is not specified in the provided data. Verify RoHS compliance requirements with the supplier or manufacturer if regulatory compliance is a design requirement.

Q: Can I use the 3KP64CA-TP if my circuit requires the P600 package?

A: The 3KP64CA-TP uses the R-6 axial package, which differs from the P600. If your PCB design specifically requires the P600 footprint, the 5KP64CA-B is the appropriate choice. If board layout can accommodate the R-6 package dimensions, the 3KP64CA-TP is electrically suitable.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by: (1) Voltage - Reverse Standoff: 64V, (2) Voltage - Breakdown (Min): 71.1V, (3) Voltage - Clamping (Max): 103V, (4) Operating Temperature: -55°C to 175°C, (5) Mounting Type: Through Hole, and (6) Package configuration: Axial. Current and power ratings may exceed the original specification without affecting compatibility.