Equivalent & Substitute Parts for 5KP30 TVS Diode

Part Overview

The 5KP30 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 30V reverse standoff voltage, 5000W peak pulse power rating, and through-hole P600 axial packaging. The 5KP30 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	30V
Voltage - Breakdown (Min)	31.55V
Voltage - Clamping (Max) @ Ipp	50.82V
Power - Peak Pulse	5000W (5kW)
Type	Zener
Unidirectional Channels	1
Mounting Type	Through Hole
Package / Case	P600, Axial
Operating Temperature	-55°C ~ 175°C (TJ)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP30 is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 30V (exact match required)
Voltage - Breakdown (Min): 31.55V to 34.2V (acceptable range)
Voltage - Clamping (Max) @ Ipp: 48.4V to 64.3V (acceptable range)
Power - Peak Pulse: 5000W minimum (5kW or higher)
Type: Zener diode, unidirectional
Mounting Type: Through Hole
Operating Temperature: -55°C minimum to 175°C maximum

Secondary Considerations:

Package compatibility: P600 axial preferred; R-6 and DO-204AC (DO-15) axial packages acceptable
RoHS3 compliance preferred for regulatory alignment
Product status: Active status preferred over obsolete

Substitute parts are grouped into two categories: direct package replacements (P600 axial) and functional equivalents with alternative packages (R-6, DO-204AC).

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Power - Peak Pulse	Package / Case	Operating Temperature	Product Status	RoHS Status
5KP30	Littelfuse Inc.	30V	31.55V	50.82V	5000W	P600, Axial	-55°C ~ 175°C	Obsolete	ROHS3 Compliant
5KP30A	Diotec Semiconductor	30V	33.3V	48.4V	5000W	P600, Axial	-50°C ~ 175°C	Active	ROHS3 Compliant
SA30A	Taiwan Semiconductor Corporation	30V	33.3V	64.3V	500W	DO-204AC, DO-15, Axial	-55°C ~ 175°C	Active	ROHS3 Compliant
SA30A-B	Littelfuse Inc.	30V	33.3V	48.4V	500W	DO-204AC, DO-15, Axial	-55°C ~ 175°C	Active	ROHS3 Compliant
SLD30U-017-B	Littelfuse Inc.	30V	33.3V	48.4V	5000W	P600, Axial	-55°C ~ 175°C	Active	ROHS3 Compliant
15KP30A-TP	Micro Commercial Co	30V	33.3V	50.7V	15000W	R-6, Axial	-55°C ~ 175°C	Active	ROHS3 Compliant
1N8164	Microchip Technology	30V	34.2V	49.9V	150W	Axial	-55°C ~ 175°C	Active	RoHS non-compliant
30KP30A-TP	Micro Commercial Co	30V	34.61V	55.2V	30000W	R-6, Axial	-55°C ~ 175°C	Active	ROHS3 Compliant
3KP30A-TP	Micro Commercial Co	30V	33.3V	48.4V	3000W	R-6, Axial	-55°C ~ 175°C	Active	ROHS3 Compliant
5KP30A-G	Comchip Technology	30V	33.3V	48.4V	5000W	R-6, Axial	-55°C ~ 150°C	Active	ROHS3 Compliant
5KP30A-TP	Micro Commercial Co	30V	33.3V	48.4V	5000W	R-6, Axial	-55°C ~ 175°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Package Replacement (P600 Axial):

5KP30A (Diotec Semiconductor) and SLD30U-017-B (Littelfuse Inc.) are the primary direct substitutes. Both maintain the P600 axial package, 5000W power rating, and 30V standoff voltage. SLD30U-017-B is Littelfuse-manufactured and carries automotive-grade AEC-Q101 qualification, providing enhanced reliability for mission-critical applications. 5KP30A offers active product status with established supply availability.

Functional Equivalents with Alternative Packages (R-6 Axial):

5KP30A-TP (Micro Commercial Co), 5KP30A-G (Comchip Technology), 15KP30A-TP, and 30KP30A-TP maintain the 30V standoff voltage and 5000W or higher power ratings in R-6 axial packaging. These parts are suitable for applications where package footprint flexibility exists. 15KP30A-TP and 30KP30A-TP provide 15kW and 30kW power ratings respectively, offering design margin for high-energy transient events.

Lower Power Alternatives (DO-204AC Package):

SA30A and SA30A-B are 500W-rated alternatives in DO-204AC (DO-15) axial packaging. These parts are appropriate only for applications with reduced transient energy requirements and are not suitable as direct replacements for 5kW-rated designs.

Compliance Considerations:

All recommended substitutes except 1N8164 are ROHS3 compliant. 1N8164 (Microchip Technology) is RoHS non-compliant and should be avoided in regulated applications. SLD30U-017-B carries AEC-Q101 automotive qualification for applications requiring automotive-grade reliability.

Frequently Asked Questions (FAQ)

Q: Can I use SA30A or SA30A-B as direct replacements for the 5KP30?

A: No. While SA30A and SA30A-B match the 30V standoff voltage, their 500W power rating is insufficient for applications designed around the 5KP30's 5000W capability. These parts are suitable only for lower-energy transient protection circuits.

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

A: Both are through-hole axial packages suitable for PCB mounting. P600 is the original package for the 5KP30. R-6 is an alternative axial package used by several manufacturers. Mechanical compatibility depends on PCB pad spacing and lead diameter specifications. Verify footprint compatibility before substitution.

Q: Is SLD30U-017-B suitable for automotive applications?

A: Yes. SLD30U-017-B carries AEC-Q101 automotive qualification and is manufactured by Littelfuse Inc. It is appropriate for automotive-grade transient voltage suppression requiring enhanced reliability and traceability.

Q: Why is 1N8164 listed if it is RoHS non-compliant?

A: 1N8164 meets the electrical parameters for 30V standoff voltage and general-purpose TVS applications. However, its RoHS non-compliance and 150W power rating make it unsuitable for most modern designs. It is included for reference only and should not be selected for new designs.

Q: Can I use higher power-rated parts like 15KP30A-TP or 30KP30A-TP?

A: Yes. Higher power ratings (15kW, 30kW) provide additional design margin for transient energy absorption without compromising electrical performance. These parts are suitable substitutes when circuit board space and thermal management allow for larger packages.

Q: What is the operating temperature range difference between 5KP30A-G and other substitutes?

A: 5KP30A-G has a maximum operating temperature of 150°C, compared to 175°C for most other substitutes. This 25°C difference may be significant in high-temperature environments. Verify thermal requirements before selecting this part.

Q: Are all substitute parts in active production status?

A: Yes, all listed substitutes except the original 5KP30 are in active production status, ensuring long-term availability and supply chain stability.

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