Equivalent & Substitute Parts for 3KP58A-B TVS Diode

Part Overview

The 3KP58A-B is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This component features a 58V reverse standoff voltage, 93.6V maximum clamping voltage, and 32.1A peak pulse current capability in a through-hole P600 axial package. The 3KP58A-B is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

3KP58A-B

LittelfuseIn Stock: 10053KP58A-B Datasheet

Current PartRFQ

5KP58A-B

Littelfuse Inc.In Stock: 9455KP58A-B Datasheet

DirectRFQ

3KP58A-TP

Micro Commercial CoIn Stock: 9533KP58A-TP Datasheet

MFR RecommendedRFQ

5KP58A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 46865KP58A-E3/54 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3KP58A-B are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 58V
• Voltage - Breakdown (Min): 64.4V
• Voltage - Clamping (Max) @ Ipp: 93.6V (±1V tolerance acceptable)
• Unidirectional Channels: 1
• Mounting Type: Through Hole
• Package / Case: P600 or R-6 Axial

Allowable Variations:

• Current - Peak Pulse (10/1000µs): Equal to or greater than 32.1A
• Power - Peak Pulse: Equal to or greater than 3000W
• Operating Temperature Range: Must encompass -55°C to 175°C
• Manufacturer: Different manufacturers permitted if electrical specifications match

The 3KP58A-B has been superseded by higher-current variants and alternative manufacturer equivalents that maintain identical voltage characteristics while offering improved current handling or active product status.

Parameter Comparison

Engineering Selection Recommendations

5KP58A-B (Littelfuse Inc.) is the primary direct substitute for the 3KP58A-B. This part maintains identical voltage specifications and package configuration while offering increased current handling (54.5A vs. 32.1A) and power dissipation (5000W vs. 3000W). The 5KP58A-B carries Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

5KP58A-E3/54 (Vishay General Semiconductor - TransZorb® Series) provides an alternative with equivalent voltage performance and superior current capacity (53.4A). The clamping voltage is marginally higher at 94V, which remains within acceptable engineering tolerance for general-purpose protection applications. This part is available in Cut Tape packaging and maintains ROHS3 compliance and Active status.

3KP58A-TP (Micro Commercial Co) matches the electrical specifications of the original 3KP58A-B exactly, including current and power ratings. This part is suitable for direct replacement in applications where the R-6 axial package is compatible with existing PCB layouts. Active product status ensures continued availability.

Selection should prioritize parts with Active product status to ensure supply chain continuity. The 5KP58A-B is recommended as the primary choice due to manufacturer continuity with Littelfuse and enhanced performance margins.

Frequently Asked Questions (FAQ)

Q: Can the 5KP58A-B replace the 3KP58A-B in existing designs?

A: Yes. The 5KP58A-B is a direct substitute with identical voltage characteristics (58V standoff, 93.6V clamping) and the same P600 axial package. The increased current rating (54.5A vs. 32.1A) provides additional protection margin without affecting circuit compatibility.

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 are different mechanical configurations. The 3KP58A-TP uses the R-6 package, which may require PCB layout verification for compatibility with existing designs using the P600 package.

Q: Why is the 3KP58A-B obsolete?

A: The 3KP58A-B has been superseded by higher-performance variants in the 5KP series, which offer increased current and power handling while maintaining the same voltage protection characteristics. Littelfuse has transitioned production to these improved models.

Q: Are all substitute parts RoHS compliant?

A: The 5KP58A-B and 5KP58A-E3/54 are ROHS3 compliant. The 3KP58A-TP RoHS status is not specified in the available data. Verify RoHS compliance requirements with the manufacturer if regulatory certification is required.

Q: Can I use a higher-current TVS diode as a substitute?

A: Yes. The 5KP58A-B and 5KP58A-E3/54 both provide higher current ratings (54.5A and 53.4A respectively) while maintaining identical voltage specifications. Higher current capacity does not degrade circuit performance and provides additional transient protection margin.

Q: What is the significance of the clamping voltage specification?

A: The clamping voltage (93.6V for the 3KP58A-B, 94V for the 5KP58A-E3/54) defines the maximum voltage the TVS diode will allow across the protected circuit during a transient event. The 0.4V difference between these parts is negligible for general-purpose protection applications.