6KA24/4 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 6KA24/4 is a unidirectional Zener-type transient voltage suppressor manufactured by Vishay General Semiconductor - Diodes Division. This through-hole axial P600 package device is rated for 24V reverse standoff voltage with a 45V maximum clamping voltage and 90A peak pulse current (8/20µs). The part is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	6KA24/4
Manufacturer	Vishay General Semiconductor - Diodes Division
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	24V
Voltage - Breakdown (Min)	26.7V
Voltage - Clamping (Max) @ Ipp	45V
Current - Peak Pulse (10/1000µs)	90A (8/20µs)
Power - Peak Pulse	6000W (6kW)
Operating Temperature Range	-65°C to 185°C (TJ)
Mounting Type	Through Hole
Package / Case	P600, Axial
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the 6KA24/4 is determined by the following critical parameters:

Voltage - Reverse Standoff: 24V (all substitutes maintain this specification)
Voltage - Breakdown (Min): 26.7V to 26.81V (acceptable range for 24V class devices)
Unidirectional Channels: 1 (single channel requirement)
Mounting Type: Through Hole (mechanical compatibility)
Package / Case: P600 or R-6 Axial (physical form factor)
Type: Zener (functional classification)

Substitute parts are grouped into two categories based on power dissipation capability:

Higher Power Dissipation Group (15kW - 20kW): 15KP24A-TP, 15KPA24A, 15KPA24AE3/TR13, 15KPA24E3/TR13, 20KPA24A. These parts provide increased peak pulse power ratings (15000W to 20000W) compared to the original 6kW specification, offering enhanced transient protection margins.

Equivalent Power Dissipation Group (3kW - 5kW): 3KP24A-TP, 5KP24A, 5KP24A-B, 5KP24A-G, 5KP24A-TP. These parts maintain power ratings closer to the original 6kW specification, with 5kW options providing near-equivalent performance.

All substitute parts are active products with RoHS3 compliance, addressing the obsolescence and regulatory status of the original part.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package / Case	Product Status	RoHS Status
6KA24/4	Vishay General Semiconductor	24V	26.7V	45V	90A (8/20µs)	6000W	-65°C to 185°C	P600, Axial	Obsolete	RoHS non-compliant
15KP24A-TP	Micro Commercial Co	24V	26.7V	40.5V	—	15000W	-55°C to 175°C	R-6, Axial	Active	ROHS3 Compliant
15KPA24A	MDE Semiconductor Inc	24V	26.81V	40.7V	371A	15000W	-55°C to 175°C	P600, Axial	Active	ROHS3 Compliant
15KPA24AE3/TR13	Microchip Technology	24V	26.81V	40.7V	371A	15000W	-55°C to 175°C	P600, Axial	Active	ROHS3 Compliant
15KPA24E3/TR13	Microchip Technology	24V	25.27V	—	—	15000W	-55°C to 175°C	P600, Axial	Active	ROHS3 Compliant
20KPA24A	MDE Semiconductor Inc	24V	26.81V	41.2V	490.3A	20000W	-55°C to 175°C	P600, Axial	Active	ROHS3 Compliant
3KP24A-TP	Micro Commercial Co	24V	26.7V	38.9V	—	3000W	-55°C to 175°C	R-6, Axial	Active	ROHS3 Compliant
5KP24A	Littelfuse Inc.	24V	26.7V	38.9V	131.1A	5000W	-55°C to 175°C	P600, Axial	Active	ROHS3 Compliant
5KP24A-B	Littelfuse Inc.	24V	26.7V	38.9V	131.1A	5000W	-55°C to 175°C	P600, Axial	Active	ROHS3 Compliant
5KP24A-G	Comchip Technology	24V	26.7V	38.9V	128.53A	5000W	-55°C to 150°C	R-6, Axial	Active	ROHS3 Compliant
5KP24A-TP	Micro Commercial Co	24V	26.7V	38.9V	—	5000W	-55°C to 175°C	R-6, Axial	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Same Package, Similar Power Rating):

The 5KP24A and 5KP24A-B (Littelfuse Inc.) in P600 axial package provide the closest functional equivalence to the 6KA24/4. Both maintain the 24V reverse standoff specification, 26.7V minimum breakdown voltage, and P600 through-hole package. The 5kW peak pulse power rating is slightly lower than the original 6kW specification but remains within the same power class. Both parts are active products with ROHS3 compliance, addressing the obsolescence and regulatory limitations of the original part.

For Enhanced Protection (Higher Power Dissipation):

The 15KPA24A and 15KPA24AE3/TR13 (Microchip Technology) offer 15kW peak pulse power in the same P600 axial package. These parts maintain 24V reverse standoff voltage and provide significantly improved transient suppression capability. The 15KPA24A is available in bulk packaging, while 15KPA24AE3/TR13 is supplied in tape and reel format. Both are active products with full ROHS3 compliance.

The 20KPA24A (MDE Semiconductor Inc) provides the highest power dissipation at 20kW in P600 package, suitable for applications requiring maximum transient protection margins.

For Alternative Package Configurations:

The 5KP24A-G (Comchip Technology) and 5KP24A-TP (Micro Commercial Co) offer R-6 axial package alternatives with 5kW power ratings. These maintain electrical compatibility while providing different physical form factors. Note that 5KP24A-G has a reduced operating temperature range (-55°C to 150°C) compared to other substitutes.

All recommended substitutes are active products with ROHS3 compliance, eliminating the regulatory and availability constraints of the obsolete 6KA24/4.

Frequently Asked Questions (FAQ)

Q: Can I use a 15kW rated TVS diode as a direct replacement for the 6kW rated 6KA24/4?

A: Yes. The 15KPA24A and 15KPA24AE3/TR13 maintain the same 24V reverse standoff voltage, 26.7V to 26.81V breakdown voltage range, and P600 through-hole package as the original part. The higher power rating provides enhanced transient suppression capability without compromising electrical compatibility. The lower clamping voltage (40.7V versus 45V) actually improves circuit protection performance.

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

A: Both are through-hole axial packages for transient voltage suppressors. P600 and R-6 are different physical form factors with different lead spacing and body dimensions. Verify PCB footprint compatibility before selecting between these package types. The electrical performance of parts within each package type is equivalent when voltage and power ratings match.

Q: Why do some substitute parts have missing current or clamping voltage specifications?

A: The provided data reflects manufacturer datasheets where certain parameters are not specified or are derived from other electrical characteristics. Parts with incomplete specifications remain valid substitutes when voltage ratings and power dissipation match the application requirements. Consult full manufacturer datasheets for complete electrical characterization.

Q: Is the 5KP24A-G suitable for high-temperature applications?

A: The 5KP24A-G has a maximum operating temperature of 150°C, which is lower than other 5kW alternatives (175°C). For applications requiring the full -55°C to 175°C operating range, select 5KP24A, 5KP24A-B, or 5KP24A-TP instead.

Q: What packaging formats are available for the recommended substitutes?

A: Substitute parts are available in multiple packaging formats: Bulk (loose components), Cut Tape (CT), Tape & Reel (TR), and Tape & Box (TB). Select packaging based on procurement volume and assembly requirements. Electrical specifications remain identical across packaging formats for the same part number base.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitute parts carry ROHS3 compliance certification, addressing the RoHS non-compliant status of the obsolete 6KA24/4. This ensures compatibility with modern procurement and environmental regulations.

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