5KP64-B Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 5KP64-B is a unidirectional Zener-type transient voltage suppressor diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This component features a 64V reverse standoff voltage rating and 5000W peak pulse power handling capability in a through-hole P600 axial package. The 5KP64-B is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain electrical and mechanical compatibility for new designs and ongoing production requirements.

Substiute Parts

5KP64-B

LittelfuseIn Stock: 11145KP64-B Datasheet

Current PartRFQ

5KP64A

Diotec SemiconductorIn Stock: 384715KP64A Datasheet

DirectRFQ

5KP64A-B

Littelfuse Inc.In Stock: 10475KP64A-B Datasheet

DirectRFQ

5KP64E3/TR13

Microchip TechnologyIn Stock: 10105KP64E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP64-B is determined by the following critical electrical and mechanical parameters:

Mandatory Matching Parameters:

• Voltage - Reverse Standoff (Typ): 64V
• Unidirectional Channels: 1
• Power - Peak Pulse: 5000W (5kW)
• Package / Case: P600, Axial
• Mounting Type: Through Hole

Allowable Variation Parameters:

• Voltage - Breakdown (Min): Range 67.37V to 71.1V
• Voltage - Clamping (Max) @ Ipp: Range 103V to 114V
• Current - Peak Pulse (10/1000µs): 43.9A to 49.5A
• Operating Temperature Range: -50°C to -55°C minimum; 175°C maximum
• RoHS and REACH compliance status

The three identified substitute parts maintain identical standoff voltage, power rating, package configuration, and mounting type. Variations in clamping voltage and peak pulse current remain within acceptable engineering tolerances for general-purpose transient protection applications.

Parameter Comparison

Engineering Selection Recommendations

5KP64A (Diotec Semiconductor): This substitute maintains full electrical equivalence with identical standoff voltage and power rating. The clamping voltage of 103V is lower than the original 108.15V, providing enhanced protection margin. Peak pulse current of 49A supports the 5kW power specification. Active product status ensures ongoing availability. RoHS compliance status is not applicable for this manufacturer. Suitable for applications where RoHS3 compliance is not a requirement.

5KP64A-B (Littelfuse Inc.): This substitute is manufactured by the same original equipment manufacturer as the 5KP64-B. It maintains identical standoff voltage, power rating, and operating temperature range (-55°C to 175°C). The clamping voltage of 103V provides improved protection characteristics compared to the original part. ROHS3 compliance and REACH unaffected status align with the original part's regulatory requirements. This option provides direct manufacturer continuity and is recommended for designs requiring maintained compliance certifications.

5KP64E3/TR13 (Microchip Technology): This manufacturer-recommended substitute maintains full electrical equivalence with identical standoff voltage and power rating. The clamping voltage of 114V is higher than the original specification, suitable for applications with less stringent clamping requirements. Peak pulse current of 43.9A supports the 5kW power specification. Active product status and ROHS3 compliance ensure regulatory alignment. Supplied in Tape & Reel packaging format, optimized for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the 5KP64A substitute be used in applications originally designed for the 5KP64-B?

A: Yes. The 5KP64A maintains the critical electrical parameters: 64V reverse standoff voltage, 5000W peak pulse power, and P600 axial through-hole package. The lower clamping voltage (103V vs. 108.15V) provides enhanced transient suppression. Verify that your application does not require ROHS3 compliance, as this substitute's RoHS status is not applicable.

Q: What is the difference between the 5KP64A-B and 5KP64E3/TR13 substitutes?

A: Both maintain identical standoff voltage and power rating. The primary differences are manufacturer (Littelfuse vs. Microchip), clamping voltage (103V vs. 114V), and packaging format (bulk vs. tape & reel). The 5KP64A-B offers direct manufacturer continuity with the original part. The 5KP64E3/TR13 is optimized for automated assembly with tape & reel packaging.

Q: Are all substitute parts available in the same P600 axial package?

A: Yes. All three substitute parts use the P600 axial through-hole package, ensuring mechanical and electrical compatibility with existing PCB designs and assembly processes.

Q: Which substitute part should be selected for new production designs?

A: For new designs requiring ROHS3 compliance and maintained regulatory alignment, select either the 5KP64A-B (Littelfuse) or 5KP64E3/TR13 (Microchip). The 5KP64A-B provides manufacturer continuity, while the 5KP64E3/TR13 offers tape & reel packaging for automated assembly. Both are active products with confirmed inventory availability.

Q: What is the significance of the clamping voltage variation among substitutes?

A: Clamping voltage determines the maximum voltage transient suppression level. The 5KP64A and 5KP64A-B clamp at 103V, providing tighter protection than the original 108.15V specification. The 5KP64E3/TR13 clamps at 114V, allowing higher transient voltages. Selection depends on your circuit's transient voltage tolerance and protection requirements.