3KP5.0-B Equivalent & Substitute Parts

Part Overview

The 3KP5.0-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This component features a 5V reverse standoff voltage, 9.66V maximum clamping voltage, and 326.1A peak pulse current capability in a through-hole P600 axial package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	3KP5.0-B
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	5V
Voltage - Breakdown (Min)	6.03V
Voltage - Clamping (Max) @ Ipp	9.66V
Current - Peak Pulse (10/1000µs)	326.1A
Power - Peak Pulse	3000W (3kW)
Operating Temperature	-55°C ~ 175°C (TJ)
Mounting Type	Through Hole
Package / Case	P600, Axial
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 3KP5.0-B is determined by the following critical parameters:

Voltage Rating: Reverse standoff voltage of 5V and breakdown voltage minimum of 6.03V
Clamping Characteristics: Maximum clamping voltage at peak pulse current
Current Handling: Peak pulse current capability of 326.1A at 10/1000µs waveform
Power Dissipation: Peak pulse power rating of 3000W
Package Compatibility: Through-hole axial configuration (P600 or equivalent R-6)
Temperature Range: Operating range of -55°C to 175°C
Regulatory Compliance: ROHS3 compliance requirement

The substitute parts identified maintain the core voltage and current specifications while offering either equivalent or enhanced performance characteristics. Package variations (P600 versus R-6) are mechanically compatible for through-hole applications.

Parameter Comparison

Parameter	3KP5.0-B (Main)	5KP5.0A-B	3KP5.0A-TP	5KP5.0A-TP
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Micro Commercial Co	Micro Commercial Co
Product Status	Obsolete	Active	Active	Active
Type	Zener	Zener	Zener	Zener
Voltage - Reverse Standoff (Typ)	5V	5V	5V	5V
Voltage - Breakdown (Min)	6.03V	6.4V	6.4V	6.4V
Voltage - Clamping (Max) @ Ipp	9.66V	9.2V	9.2V	9.2V
Current - Peak Pulse (10/1000µs)	326.1A	554.3A	326.1A	Not Specified
Power - Peak Pulse	3000W	5000W	3000W	5000W
Operating Temperature	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C	-55°C ~ 175°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	P600, Axial	P600, Axial	R-6, Axial	R-6, Axial
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not Specified	ROHS3 Compliant

Engineering Selection Recommendations

5KP5.0A-B (Littelfuse Inc.): This part maintains Littelfuse manufacturer continuity with active product status. It provides enhanced current handling (554.3A versus 326.1A) and increased power dissipation (5000W versus 3000W) while maintaining the same 5V voltage rating and operating temperature range. ROHS3 compliance is confirmed. The P600 package matches the original specification exactly.

3KP5.0A-TP (Micro Commercial Co): This alternative offers equivalent current and power specifications (326.1A, 3000W) to the original part with active product status. The R-6 axial package is mechanically compatible with through-hole applications. REACH compliance is confirmed, though RoHS status is not specified in available data.

5KP5.0A-TP (Micro Commercial Co): This option provides enhanced performance with 5000W peak pulse power and active product status. The R-6 package is mechanically compatible. ROHS3 compliance and REACH compliance are confirmed. Peak pulse current is not specified in available data.

All substitute parts maintain the 5V reverse standoff voltage, -55°C to 175°C operating temperature range, and unidirectional zener diode configuration required for functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can the 3KP5.0-B be directly replaced with 5KP5.0A-B?

A: Yes. Both parts share identical voltage ratings (5V reverse standoff), operating temperature range (-55°C to 175°C), and through-hole P600 axial package. The 5KP5.0A-B provides higher current and power ratings, making it a direct upgrade-capable substitute.

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

A: Both are through-hole axial packages for TVS diodes. P600 and R-6 are mechanically compatible for board-level installation. The primary difference is the package designation used by different manufacturers.

Q: Are the Micro Commercial Co parts (3KP5.0A-TP and 5KP5.0A-TP) fully equivalent to Littelfuse parts?

A: Both Micro Commercial Co alternatives maintain the critical voltage and current specifications. The 3KP5.0A-TP matches the original 3KP5.0-B in current and power ratings. Verify REACH and RoHS compliance requirements for your specific application, as documentation varies.

Q: Why does 5KP5.0A-TP not specify peak pulse current?

A: The peak pulse current specification is not provided in the available technical data for this part. Contact the manufacturer for complete electrical specifications if this parameter is critical to your application.

Q: Can I use a higher power-rated substitute (5000W instead of 3000W)?

A: Yes. A higher power rating provides additional thermal margin and transient protection capability. The 5KP5.0A-B and 5KP5.0A-TP both offer 5000W peak pulse power while maintaining voltage compatibility.

Q: What compliance certifications are required for my application?

A: All identified substitutes maintain ROHS3 compliance. Verify REACH compliance requirements with your procurement or quality department. The original 3KP5.0-B and substitute 5KP5.0A-B are both ROHS3 compliant.

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