5KP54 Transient Voltage Suppressor (TVS) Equivalent & Substitute Parts

Part Overview

The 5KP54 is a unidirectional Zener transient voltage suppressor manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This through-hole P600 axial package device provides 5000W peak pulse power handling with a 54V reverse standoff voltage and 91.46V maximum clamping voltage. The 5KP54 is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain functional compatibility within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Manufacturer Part Number	5KP54
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	54V
Voltage - Breakdown (Min)	56.84V
Voltage - Clamping (Max) @ Ipp	91.46V
Power - Peak Pulse	5000W (5kW)
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 of the 5KP54 is determined by the following critical parameters:

Electrical Compatibility Criteria:

Unidirectional Zener TVS diode type
Voltage - Reverse Standoff (Typ): 54V ±tolerance
Voltage - Clamping (Max) @ Ipp: within acceptable range for overvoltage protection (85V–96.3V)
Power - Peak Pulse: minimum 1500W; 5000W preferred for direct replacement
Operating Temperature: -55°C ~ 175°C minimum

Mechanical Compatibility Criteria:

Mounting Type: Through Hole
Package options: P600 (direct), DO-201, DO-15, DO-41 (alternative packages)
Axial lead configuration

Compliance Requirements:

RoHS3 Compliant or equivalent
REACH Unaffected or REACH Compliant status

Substitute parts are grouped into two categories: direct equivalents (same package and power rating) and functional equivalents (alternative packages with compatible electrical parameters).

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Product Status	Operating Temperature
5KP54	Littelfuse Inc.	54V	56.84V	91.46V	—	5000W	P600, Axial	Obsolete	-55°C ~ 175°C
5KP54A	Littelfuse Inc.	54V	60V	87.1V	58.6A	5000W	P600, Axial	Active	-55°C ~ 175°C
5KP54E3/TR13	Microchip Technology	54V	60V	96.3V	51.9A	5000W	P600, Axial	Active	-55°C ~ 175°C
1.5KE62A	Taiwan Semiconductor Corporation	53V	58.9V	85V	18A	1500W	DO-201AA, Axial	Active	-55°C ~ 175°C
1.5KE68A	Meritek	—	64.6V	92V	16.5A	1500W	DO-201, Axial	Active	-55°C ~ 175°C
P6KE62A	Diotec Semiconductor	53V	58.9V	85V	7.4A	600W	DO-15, Axial	Active	-50°C ~ 175°C
P6KE68A	Fairchild Semiconductor	58.1V	64.6V	92V	6.8A	600W	DO-15, Axial	Active	-50°C ~ 175°C
P4KE62A-TP	Micro Commercial Co	53V	58.9V	85V	4.8A	400W	DO-41, Axial	Active	-55°C ~ 175°C
1N5612	Microchip Technology	49V	54V	78.5V	116A (8/20µs)	1500W	G, Axial	Active	-55°C ~ 175°C
SA58A-TP	Micro Commercial Co	58V	64.4V	93.6V	5.4A	500W	DO-15, Axial	Active	-55°C ~ 175°C

Engineering Selection Recommendations

Direct Replacement (Same Package, Same Power Rating):

5KP54A and 5KP54E3/TR13 are the primary direct replacements for the obsolete 5KP54. Both maintain the P600 axial package and 5000W peak pulse power rating. 5KP54A is manufactured by Littelfuse Inc. (original manufacturer) with active product status and ROHS3 compliance. 5KP54E3/TR13 is manufactured by Microchip Technology with active status, ROHS3 compliance, and REACH Unaffected certification. Both operate across the full -55°C to 175°C temperature range and provide clamping voltages within acceptable tolerance (87.1V and 96.3V respectively).

Functional Equivalents (Alternative Packages, Reduced Power Rating):

For applications where package constraints permit alternative form factors, the following parts provide functional equivalence with reduced power handling:

1.5KE62A (Taiwan Semiconductor Corporation) and 1.5KE68A (Meritek) offer 1500W peak pulse power in DO-201 axial packages. These parts maintain the 54V–58V reverse standoff voltage range and provide clamping voltages of 85V and 92V respectively. Both are active products with full temperature range support.

P6KE62A (Diotec Semiconductor) and P6KE68A (Fairchild Semiconductor) provide 600W peak pulse power in DO-15 axial packages. These are suitable for lower-power applications requiring the same voltage protection characteristics. P6KE62A operates to -50°C minimum; P6KE68A also operates to -50°C minimum.

P4KE62A-TP (Micro Commercial Co) offers 400W peak pulse power in DO-41 axial package for minimal-footprint applications. This part maintains 53V reverse standoff and 85V clamping voltage with full -55°C to 175°C temperature range.

1N5612 (Microchip Technology) provides an alternative with 49V reverse standoff voltage and 78.5V clamping voltage in a G axial package. This part delivers 1500W peak pulse power and is suitable only where the lower voltage rating is acceptable.

SA58A-TP (Micro Commercial Co) offers 500W peak pulse power in DO-15 axial package with 58V reverse standoff and 93.6V clamping voltage, suitable for applications requiring higher clamping voltage tolerance.

All recommended substitutes are active products with ROHS3 compliance or equivalent environmental certification.

Frequently Asked Questions (FAQ)

Q: Can 5KP54A directly replace the obsolete 5KP54?

A: Yes. 5KP54A is manufactured by Littelfuse Inc. (the original manufacturer) and maintains identical package (P600 axial), power rating (5000W), reverse standoff voltage (54V), and operating temperature range (-55°C to 175°C). The clamping voltage (87.1V) is within acceptable tolerance of the original specification (91.46V).

Q: What is the difference between 5KP54A and 5KP54E3/TR13?

A: Both are direct replacements with P600 axial packages and 5000W power ratings. 5KP54A is manufactured by Littelfuse Inc.; 5KP54E3/TR13 is manufactured by Microchip Technology. The primary difference is clamping voltage: 5KP54A provides 87.1V, while 5KP54E3/TR13 provides 96.3V. Both are active products with ROHS3 compliance.

Q: Can I use a 1.5KE62A or 1.5KE68A as a substitute?

A: These parts are functional equivalents for applications where 1500W peak pulse power is sufficient. They maintain compatible voltage ratings (53V–58V reverse standoff, 85V–92V clamping) and operate across the full temperature range. However, they provide one-third the power handling of the original 5KP54 (1500W vs. 5000W). Use only if circuit design permits reduced power dissipation.

Q: What are the package differences among substitute options?

A: The 5KP54 uses P600 axial package. Alternatives include DO-201 (1.5KE series), DO-15 (P6KE and SA58A series), and DO-41 (P4KE series). All are through-hole axial configurations. Package selection depends on PCB layout constraints and available board space. Smaller packages (DO-15, DO-41) correspond to lower power ratings.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitutes are ROHS3 compliant or carry equivalent environmental certification. The original 5KP54 is ROHS3 compliant; all active replacements maintain this standard.

Q: Which substitute should I choose for a new design?

A: For direct replacement in existing designs, use 5KP54A or 5KP54E3/TR13. For new designs where package flexibility exists, select based on power requirements: 5000W (5KP54A, 5KP54E3/TR13), 1500W (1.5KE62A, 1.5KE68A), 600W (P6KE62A, P6KE68A), or 400W (P4KE62A-TP). Verify clamping voltage tolerance for your specific overvoltage protection threshold.

Q: Can I use 1N5612 as a substitute?

A: 1N5612 is a functional equivalent only if your circuit design accepts a lower reverse standoff voltage (49V vs. 54V) and lower clamping voltage (78.5V vs. 91.46V). This part is suitable only for applications with reduced voltage protection requirements. Verify circuit compatibility before selection.

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