3KP64A-B Equivalent & Substitute Parts

Part Overview

The 3KP64A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This component features a 64V reverse standoff voltage with a 103V maximum clamping voltage and 29.1A peak pulse current capability. The part is classified as obsolete, making identification of suitable equivalent and substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

3KP64A-B

Littelfuse Inc.In Stock: 11593KP64A-B Datasheet

Current PartRFQ

5KP64A-B

Littelfuse Inc.In Stock: 10475KP64A-B Datasheet

DirectRFQ

3KP64A-TP

Micro Commercial CoIn Stock: 9193KP64A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3KP64A-B is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 64V
• Voltage - Breakdown (Min): 71.1V
• Voltage - Clamping (Max) @ Ipp: 103V
• Current - Peak Pulse (10/1000µs): minimum 29.1A
• Power - Peak Pulse: minimum 3000W
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Type: Zener, Unidirectional

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: Axial configuration

Substitute parts must maintain identical voltage specifications and equal or greater current and power ratings to ensure functional equivalence. Package compatibility requires matching axial through-hole mounting characteristics.

Parameter Comparison

Engineering Selection Recommendations

5KP64A-B (Littelfuse Inc.): This direct substitute from the same manufacturer maintains identical voltage specifications and package configuration while providing enhanced current and power ratings (49.5A and 5000W respectively). The part is in active production status, ensuring long-term availability and supply chain stability. ROHS3 compliance is confirmed.

3KP64A-TP (Micro Commercial Co): This manufacturer-recommended alternative matches the electrical specifications and current/power ratings of the original 3KP64A-B. The part is in active production status. The package designation differs (R-6 versus P600), requiring mechanical verification for PCB footprint compatibility. REACH compliance is confirmed; RoHS status is not specified in available documentation.

Both substitutes satisfy the electrical requirements for direct replacement in applications requiring 64V standoff voltage protection with 103V clamping characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 5KP64A-B be used as a direct replacement for the 3KP64A-B?

A: Yes. The 5KP64A-B maintains identical voltage specifications (64V standoff, 71.1V breakdown, 103V clamping) and identical package configuration (P600, Axial). The higher current rating (49.5A versus 29.1A) and power rating (5000W versus 3000W) provide enhanced transient protection capability without compromising compatibility.

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

A: Both are axial through-hole packages for TVS diodes. The P600 and R-6 designations represent different physical dimensions and lead configurations. PCB footprint compatibility must be verified before selecting the 3KP64A-TP as a substitute, as the R-6 package may require different pad spacing.

Q: Why is the 3KP64A-B listed as obsolete?

A: Obsolete status indicates the part is no longer in active production by the original manufacturer. The 5KP64A-B and 3KP64A-TP are active alternatives that provide equivalent or superior electrical performance.

Q: Are all substitute parts RoHS compliant?

A: The 5KP64A-B is confirmed ROHS3 compliant. The 3KP64A-TP RoHS status is not specified in available documentation and should be verified with the manufacturer before procurement for applications requiring RoHS compliance.

Q: Can I use the 3KP64A-TP if my PCB is designed for the P600 package?

A: The 3KP64A-TP uses the R-6 package, which has different physical dimensions. Mechanical compatibility requires verification of pad spacing and lead diameter specifications. Consult the respective datasheets or contact the manufacturer for detailed package dimensions before making a final selection.