3KP10-B Equivalent & Substitute Parts

Part Overview

The 3KP10-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 10V reverse standoff voltage, 17.85V maximum clamping voltage, and 176.5A peak pulse current capability in a through-hole P600 axial package. The 3KP10-B is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	10V
Voltage - Breakdown (Min)	10.53V
Voltage - Clamping (Max) @ Ipp	17.85V
Current - Peak Pulse (10/1000µs)	176.5A
Power - Peak Pulse	3000W
Operating Temperature Range	-55°C to 175°C (TJ)
Mounting Type	Through Hole
Package / Case	P600, Axial
Type	Zener
Unidirectional Channels	1

Substitute Part Grouping Explanation

Substitution for the 3KP10-B is determined by the following critical parameters:

Voltage - Reverse Standoff: 10V (exact match required)
Voltage - Clamping (Max) @ Ipp: 17V to 17.85V range (acceptable tolerance)
Current - Peak Pulse (10/1000µs): minimum 176.5A
Power - Peak Pulse: minimum 3000W
Operating Temperature: -55°C to 175°C (TJ)
Mounting Type: Through Hole
Package / Case: P600 or R-6 axial configuration
Type: Zener, Unidirectional

Substitute parts are grouped into two categories: direct replacements with identical electrical performance and active-status alternatives with enhanced specifications that maintain backward compatibility.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse	Power - Peak Pulse	Package / Case	Product Status
3KP10-B	Littelfuse Inc.	10V	17.85V	176.5A	3000W	P600, Axial	Obsolete
5KP10A-B	Littelfuse Inc.	10V	17V	300A	5000W	P600, Axial	Active
3KP10A-TP	Micro Commercial Co	10V	17V	176.5A	3000W	R-6, Axial	Active
5KP10A-E3/54	Vishay General Semiconductor - Diodes Division	10V	17V	294A	5000W	P600, Axial	Active
5KP10A-E3/73	Vishay General Semiconductor - Diodes Division	10V	17V	294A	5000W	P600, Axial	Active
5KP10AHE3/54	Vishay General Semiconductor - Diodes Division	10V	17V	294A	5000W	P600, Axial	Active
5KP10AHE3/73	Vishay General Semiconductor - Diodes Division	10V	17V	294A	5000W	P600, Axial	Active
5KP10E3/TR13	Microchip Technology	10V	18.8V	266A	5000W	P600, Axial	Active

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Performance): The 3KP10A-TP from Micro Commercial Co provides equivalent electrical specifications with 176.5A peak pulse current and 3000W peak pulse power. This part maintains the same performance envelope as the 3KP10-B while offering active product status. The R-6 axial package is mechanically compatible with P600 footprints in through-hole applications.

Enhanced Performance Alternatives (Active Status): The 5KP series parts (5KP10A-B, 5KP10A-E3/54, 5KP10A-E3/73, 5KP10AHE3/54, 5KP10AHE3/73) provide higher peak pulse current (294A to 300A) and increased power dissipation (5000W), delivering superior transient protection while maintaining the 10V reverse standoff voltage and 17V clamping voltage specification. These parts are suitable for applications requiring enhanced margin or higher transient stress conditions.

Automotive-Grade Option: The 5KP10AHE3/54 and 5KP10AHE3/73 variants include AEC-Q101 automotive qualification, appropriate for automotive and harsh-environment applications requiring formal reliability certification.

Microchip Alternative: The 5KP10E3/TR13 from Microchip Technology offers 5000W peak pulse power with a slightly elevated clamping voltage of 18.8V, suitable for applications where additional voltage margin is acceptable.

All substitute parts maintain ROHS3 compliance, MSL 1 (unlimited moisture sensitivity), and the -55°C to 175°C operating temperature range of the original 3KP10-B.

Frequently Asked Questions (FAQ)

Q: Can the 5KP series parts directly replace the 3KP10-B? A: Yes. The 5KP series maintains the critical 10V reverse standoff voltage and 17V clamping voltage specification. The higher peak pulse current (294A to 300A) and power rating (5000W) provide enhanced protection margin while remaining backward compatible with the 3KP10-B electrical interface.

Q: What is the difference between P600 and R-6 packages? A: Both are through-hole axial packages suitable for PCB mounting. P600 and R-6 are mechanically compatible footprints. The 3KP10A-TP uses the R-6 package while maintaining identical electrical performance to P600-packaged alternatives.

Q: Why are there multiple Vishay part numbers (5KP10A-E3/54, 5KP10A-E3/73, 5KP10AHE3/54, 5KP10AHE3/73)? A: These designations represent different packaging and qualification variants from Vishay. The /54 and /73 suffixes indicate different tape and reel configurations or manufacturing date codes. The AHE3 variant includes automotive-grade qualification (AEC-Q101). All maintain identical electrical specifications.

Q: Is the 5KP10E3/TR13 from Microchip a suitable replacement? A: Yes, with consideration for the 18.8V clamping voltage specification, which is 0.95V higher than the 3KP10-B. This part is suitable for applications where the slightly elevated clamping voltage does not conflict with circuit design requirements.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity level, matching the environmental and regulatory status of the 3KP10-B.

Q: Which substitute part should I select for new designs? A: For new designs, select from active-status parts: 5KP10A-B (Littelfuse), 5KP10A-E3/54 or 5KP10A-E3/73 (Vishay), or 5KP10E3/TR13 (Microchip). For automotive applications, specify 5KP10AHE3/54 or 5KP10AHE3/73 with AEC-Q101 qualification.

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