30KP30A-TP Equivalent & Substitute Parts

Part Overview

The 30KP30A-TP is a unidirectional transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection applications. This axial through-hole component features a 30V reverse standoff voltage with a 55.2V maximum clamping voltage and 30kW peak pulse power rating. The part is active in production status and ROHS3 compliant.

Substitute parts are identified when equivalent electrical performance can be achieved within the allowed parameter tolerances for TVS diode applications, specifically matching the 30V reverse standoff voltage specification and compatible clamping voltage ranges for circuit protection requirements.

Key Parameters

Parameter	30KP30A-TP
Voltage - Reverse Standoff (Typ)	30V
Voltage - Breakdown (Min)	34.61V
Voltage - Clamping (Max) @ Ipp	55.2V
Power - Peak Pulse	30000W (30kW)
Type	Zener
Unidirectional Channels	1
Mounting Type	Through Hole
Package / Case	R-6, Axial
Operating Temperature	-55°C ~ 175°C (TJ)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 30KP30A-TP are grouped based on the following critical electrical parameters that determine functional equivalence:

Voltage - Reverse Standoff: 30V (exact match required)
Voltage - Breakdown (Min): 33.3V to 34.61V range
Voltage - Clamping (Max) @ Ipp: 48.4V to 55.2V range
Type: Zener, Unidirectional (1 channel)
Mounting Type: Through Hole, Axial package
Operating Temperature: -55°C minimum to 150°C or higher

Substitutes are divided into two categories based on power dissipation capability:

Category A - Higher Power Rating (15kW to 20kW): Parts with reduced peak pulse power compared to the main part but maintaining the same voltage protection characteristics. These are suitable for applications where the full 30kW capability is not required.

Category B - Lower Power Rating (5kW): Parts with significantly reduced peak pulse power. These provide the same voltage protection but are limited to lower energy transient events.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Power - Peak Pulse	Current - Peak Pulse (10/1000µs)	Package / Case	Operating Temperature	RoHS Status
30KP30A-TP	Micro Commercial Co	30V	34.61V	55.2V	30000W	-	R-6, Axial	-55°C ~ 175°C	ROHS3
15KPA30A	Good-Ark Semiconductor	30V	34.61V	50.7V	15000W	297.8A	P600, Axial	-55°C ~ 150°C	ROHS3
20KPA30A	MDE Semiconductor Inc	30V	34.61V	51.5V	20000W	392.2A	P600, Axial	-55°C ~ 175°C	ROHS3
5KP30A	Diotec Semiconductor	30V	33.3V	48.4V	5000W	103A	P600, Axial	-50°C ~ 175°C	ROHS3
5KP30A-B	Littelfuse Inc.	30V	33.3V	48.4V	5000W	105.4A	P600, Axial	-55°C ~ 175°C	ROHS3
5KP30A-E3/54	Vishay General Semiconductor - Diodes Division	30V	33.3V	48.4V	5000W	103A	P600, Axial	-55°C ~ 175°C	ROHS3
5KP30AHE3/54	Vishay General Semiconductor - Diodes Division	30V	33.3V	48.4V	5000W	103A	P600, Axial	-55°C ~ 175°C	ROHS3
SLD30U-017	Littelfuse Inc.	30V	33.3V	48.4V	5000W	105.4A	P600, Axial	-55°C ~ 175°C	ROHS3

Engineering Selection Recommendations

All listed substitute parts maintain active production status and ROHS3 compliance, meeting the regulatory requirements of the original 30KP30A-TP.

For applications requiring maximum transient energy absorption (20kW to 30kW): The 20KPA30A provides the closest power rating match while maintaining the full -55°C to 175°C operating temperature range. This part is suitable as a direct substitute when peak pulse power requirements approach or equal 20kW.

For applications with moderate transient energy requirements (15kW): The 15KPA30A offers a mid-range power rating option. Note that this part has a reduced upper operating temperature limit of 150°C compared to the main part's 175°C specification.

For applications with lower transient energy requirements (5kW): Multiple qualified options exist from established manufacturers including Littelfuse Inc., Vishay General Semiconductor, and Diotec Semiconductor. The 5KP30AHE3/54 and SLD30U-017 carry automotive-grade qualification (AEC-Q101), suitable for automotive applications. The 5KP30A-B and 5KP30A-E3/54 provide equivalent electrical performance for general-purpose applications.

All substitute parts share the same 30V reverse standoff voltage and compatible clamping voltage ranges (48.4V to 51.5V), ensuring consistent circuit protection performance within the specified voltage window.

Frequently Asked Questions (FAQ)

Q: Can the 5KP30A series parts directly replace the 30KP30A-TP?

A: The 5KP30A series parts are electrically compatible for voltage protection (same 30V standoff, similar clamping voltages), but have significantly lower peak pulse power ratings (5kW vs. 30kW). Substitution is valid only if the application's transient energy levels do not exceed 5kW. Circuit analysis must confirm that peak pulse power requirements are met by the substitute part.

Q: What is the difference between the R-6 package of the main part and the P600 package of substitute parts?

A: Both R-6 and P600 are axial through-hole packages formats for TVS diodes. The physical dimensions and lead spacing may differ. Mechanical compatibility with the PCB layout must be verified before substitution. Consult component datasheets for precise package dimensions.

Q: Are the automotive-qualified parts (5KP30AHE3/54, SLD30U-017) suitable for non-automotive applications?

A: Yes. Automotive-qualified parts (AEC-Q101) meet stringent reliability and quality standards and are fully compatible with general-purpose applications. These parts provide additional qualification assurance and may be used interchangeably with non-automotive-grade equivalents in any application.

Q: What is the significance of the clamping voltage difference between the main part (55.2V) and substitute parts (48.4V to 51.5V)?

A: The clamping voltage is the maximum voltage the TVS diode allows across its terminals during a transient event. Lower clamping voltages provide tighter voltage regulation. Substitution is valid if the circuit can tolerate the lower clamping voltage of the substitute part. If the original design requires the 55.2V clamping specification, only the 30KP30A-TP or 15KPA30A (50.7V) should be used.

Q: Can I use the 20KPA30A as a direct replacement for the 30KP30A-TP?

A: The 20KPA30A is electrically compatible and maintains the full -55°C to 175°C operating temperature range. However, it has a lower peak pulse power rating (20kW vs. 30kW). Substitution is appropriate if the application's peak transient energy does not exceed 20kW. For applications requiring the full 30kW capability, the 30KP30A-TP should be retained.

Q: What is the minimum operating temperature consideration for the 5KP30A?

A: The 5KP30A has a minimum operating temperature of -50°C, compared to -55°C for most other parts listed. If the application requires operation below -50°C, alternative parts with -55°C minimum ratings should be selected.

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