3KP60A-B Equivalent & Substitute Parts

Part Overview

The 3KP60A-B is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 60V reverse standoff voltage, 96.8V maximum clamping voltage, and 31A peak pulse current capability in a through-hole P600 axial package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	60V
Voltage - Breakdown (Min)	66.7V
Voltage - Clamping (Max) @ Ipp	96.8V
Current - Peak Pulse (10/1000µs)	31A
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 of the 3KP60A-B is determined by the following critical parameters:

Voltage - Reverse Standoff: 60V (primary protection threshold)
Voltage - Clamping (Max) @ Ipp: 96.8V ±1V (clamping performance tolerance)
Current - Peak Pulse: minimum 31A (surge handling capability)
Operating Temperature Range: -55°C to 175°C (thermal compatibility)
Mounting Type: Through Hole (mechanical fit)
Package / Case: P600 or R-6 Axial (footprint compatibility)
Type: Zener, Unidirectional (functional topology)

Substitute parts are grouped into two categories: direct replacements with identical electrical specifications and higher-rated alternatives that maintain voltage parameters while offering increased current handling capacity.

Parameter Comparison

Parameter	3KP60A-B (Main)	5KP60A-B	3KP60A-TP	5KP60A-E3/54	5KP60A-E3/73
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Micro Commercial Co	Vishay General Semiconductor	Vishay General Semiconductor
Product Status	Obsolete	Active	Active	Active	Active
Voltage - Reverse Standoff (Typ)	60V	60V	60V	60V	60V
Voltage - Breakdown (Min)	66.7V	66.7V	66.7V	66.7V	66.7V
Voltage - Clamping (Max) @ Ipp	96.8V	96.8V	96.8V	97V	97V
Current - Peak Pulse (10/1000µs)	31A	52.7A	31A	51.7A	51.7A
Power - Peak Pulse	3000W	5000W	3000W	5000W	5000W
Operating Temperature Range	-55°C to 175°C	-55°C to 175°C	-55°C to 175°C	-55°C to 175°C	-55°C to 175°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	P600, Axial	P600, Axial	R-6, Axial	P600, Axial	P600, Axial
Type	Zener	Zener	Zener	Zener	Zener
Unidirectional Channels	1	1	1	1	1
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Electrical Equivalent (Identical Specifications):

The 3KP60A-TP (Micro Commercial Co) provides identical electrical performance with matching 31A peak pulse current and 96.8V clamping voltage. This part maintains full compatibility with the original 3KP60A-B specification and is currently in active production status. The R-6 axial package is mechanically compatible with P600 footprints in standard through-hole applications.

Higher-Rated Alternatives (Enhanced Surge Capability):

The 5KP60A-B (Littelfuse Inc.), 5KP60A-E3/54, and 5KP60A-E3/73 (Vishay General Semiconductor) maintain identical voltage parameters (60V standoff, 96.8V–97V clamping) while providing increased current handling at 51.7A–52.7A and 5000W peak pulse power. These parts are suitable for applications requiring enhanced transient protection margin. The Vishay TransZorb® series parts (5KP60A-E3/54 and 5KP60A-E3/73) offer clamping voltage of 97V, within acceptable tolerance of the original specification.

All substitute parts are ROHS3 compliant and maintain the -55°C to 175°C operating temperature range. Selection should be based on circuit surge requirements and available inventory status.

Frequently Asked Questions (FAQ)

Q: Can the 5KP60A-B replace the 3KP60A-B directly?

A: Yes. Both parts share identical voltage specifications (60V standoff, 96.8V clamping). The 5KP60A-B provides higher peak pulse current (52.7A vs. 31A) and power dissipation (5000W vs. 3000W), making it suitable for circuits requiring enhanced surge protection. The P600 axial package is identical.

Q: What is the difference between the 3KP60A-TP and 3KP60A-B?

A: The 3KP60A-TP is manufactured by Micro Commercial Co and provides identical electrical specifications to the original Littelfuse 3KP60A-B. The primary difference is the package designation (R-6 vs. P600), though both are compatible through-hole axial formats. The 3KP60A-TP is in active production.

Q: Are the Vishay 5KP60A-E3/54 and 5KP60A-E3/73 interchangeable?

A: Yes. Both Vishay parts have identical electrical specifications, including 60V standoff voltage, 97V clamping voltage, and 51.7A peak pulse current. The difference lies in packaging designation and inventory sourcing. Both are suitable for direct substitution.

Q: Can I use a higher-rated part like the 5KP60A-B in place of the 3KP60A-B?

A: Yes. The 5KP60A-B maintains all critical voltage parameters while providing increased current and power ratings. This substitution is appropriate for circuits where enhanced transient protection is beneficial or where the original part is unavailable.

Q: Are all substitute parts RoHS compliant?

A: The 3KP60A-TP compliance status is not specified in available documentation. The 5KP60A-B, 5KP60A-E3/54, and 5KP60A-E3/73 are all ROHS3 compliant. Verify RoHS requirements with your procurement specification before final selection.

Q: What is the significance of the clamping voltage tolerance between 96.8V and 97V?

A: The 0.2V difference between the original 96.8V specification and the Vishay 97V specification is within normal manufacturing tolerance for TVS diodes and does not affect circuit protection performance in general-purpose applications.

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