Littelfuse 5KP160C-B Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The Littelfuse 5KP160C-B is a bidirectional Zener transient voltage suppressor (TVS) diode designed for general-purpose overvoltage protection applications. This component features a 160V reverse standoff voltage rating and 5000W peak pulse power handling capability in a through-hole P600 axial package. The 5KP160C-B is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain functional compatibility while offering improved availability and product status.

Key Parameters

Parameter	Value
Manufacturer Part Number	5KP160C-B
Manufacturer	Littelfuse
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Bidirectional Channels	1
Voltage - Reverse Standoff (Typ)	160V
Voltage - Breakdown (Min)	168.75V
Voltage - Clamping (Max) @ Ipp	271.95V
Power - Peak Pulse	5000W (5kW)
Operating Temperature	-55°C ~ 175°C (TJ)
Mounting Type	Through Hole
Package / Case	P600, Axial
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the 5KP160C-B is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff (Typ): 160V
Voltage - Clamping (Max) @ Ipp: Within acceptable range for circuit protection
Power - Peak Pulse: Minimum 5000W for equivalent performance
Bidirectional Channels: 1
Type: Zener
Operating Temperature Range: -55°C ~ 175°C (TJ)
RoHS Status: ROHS3 Compliant

Substitution Categories:

Category 1 - Direct Littelfuse 5KP Series Equivalents (Same Package P600): These parts maintain identical package geometry and electrical characteristics within the 5KP series, offering direct mechanical and electrical compatibility.

Category 2 - Alternative Manufacturer TVS Diodes (Different Packages): These parts provide equivalent voltage protection and power ratings but utilize different package configurations (DO-201, DO-204AL, DO-204AC). Substitution requires mechanical redesign or adapter consideration.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Power - Peak Pulse	Package / Case	Product Status	RoHS Status
5KP160C-B	Littelfuse	160V	271.95V	5000W	P600, Axial	Obsolete	ROHS3 Compliant
5KP160CA	Littelfuse Inc.	160V	259V	5000W	P600, Axial	Active	ROHS3 Compliant
5KP160CA-B	Littelfuse Inc.	160V	259V	5000W	P600, Axial	Active	ROHS3 Compliant
1.5KE180CA	Taiwan Semiconductor Corporation	154V	246V	1500W	DO-201AA, DO-27, Axial	Active	ROHS3 Compliant
1.5KE200CA	Taiwan Semiconductor Corporation	171V	274V	1500W	DO-201AA, DO-27, Axial	Active	ROHS3 Compliant
1.5KE220CA	Taiwan Semiconductor Corporation	185V	328V	1500W	DO-201AA, DO-27, Axial	Active	ROHS3 Compliant
P4KE180CA	Taiwan Semiconductor Corporation	154V	246V	400W	DO-204AL, DO-41, Axial	Active	ROHS3 Compliant
P6KE180CA	Fairchild Semiconductor	154V	246V	600W	DO-204AC, DO-15, Axial	Active	Not specified
P6KE200CA	Fairchild Semiconductor	171V	274V	600W	DO-204AC, DO-15, Axial	Active	Not specified
SA160CA	Taiwan Semiconductor Corporation	160V	259V	500W	DO-204AC, DO-15, Axial	Active	ROHS3 Compliant
1.5KE180CA-G	Comchip Technology	154V	246V	1500W	DO-201AA, DO-27, Axial	Active	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1 - Recommended Direct Substitutes (Identical Package, Active Status):

5KP160CA and 5KP160CA-B are the primary recommended substitutes. Both maintain the P600 axial package configuration, identical reverse standoff voltage of 160V, and equivalent 5000W peak pulse power rating. Both parts are active products with ROHS3 compliance. The clamping voltage differential (259V versus 271.95V) falls within acceptable engineering tolerance for general-purpose overvoltage protection applications. 5KP160CA-B is available in bulk packaging, while 5KP160CA is supplied in cut tape format.

Tier 2 - Alternative Voltage Ratings (Same Manufacturer, Different Package):

The 1.5KE series (1.5KE180CA, 1.5KE200CA, 1.5KE220CA) from Taiwan Semiconductor Corporation provides active alternatives with reduced power rating (1500W versus 5000W) and different package geometry (DO-201). These parts are suitable for applications where the 5000W power requirement is not critical. The 1.5KE180CA-G variant from Comchip Technology offers equivalent specifications with ROHS3 compliance.

Tier 3 - Lower Power Alternatives (Reduced Power Rating):

P4KE180CA (400W) and P6KE180CA/P6KE200CA (600W) series provide lower power dissipation options in smaller packages (DO-204AL, DO-204AC). These are applicable only where circuit design permits reduced peak pulse power handling. SA160CA offers 500W power rating in DO-204AC package with matching 160V reverse standoff voltage.

All recommended substitutes maintain bidirectional operation, Zener type classification, and through-hole mounting configuration. Selection should be based on specific circuit power requirements and available board space for package accommodation.

Frequently Asked Questions (FAQ)

Q: Can 5KP160CA directly replace 5KP160C-B without PCB modification?

A: Yes. Both parts use identical P600 axial through-hole package geometry. No PCB redesign is required. The electrical parameters (160V reverse standoff, 5000W peak pulse) are equivalent for general-purpose protection applications.

Q: What is the significance of the clamping voltage difference between 5KP160C-B (271.95V) and 5KP160CA (259V)?

A: The clamping voltage represents the maximum voltage across the diode during transient suppression at peak pulse current. The 12.95V difference is within normal manufacturing tolerance for TVS diodes and does not affect functional compatibility in standard overvoltage protection circuits.

Q: Why do the 1.5KE series parts have lower power ratings (1500W) compared to the 5KP series (5000W)?

A: The 1.5KE series is designed for lower energy transient events. Selection between 5KP and 1.5KE depends on the specific circuit's peak pulse power requirement. Use 1.5KE only if circuit analysis confirms that 1500W peak pulse power is sufficient.

Q: Are P4KE and P6KE series suitable replacements for the 5KP160C-B?

A: P4KE and P6KE series are lower power alternatives (400W and 600W respectively) in smaller packages. These are suitable only if circuit design permits reduced power handling. They are not direct equivalents due to power rating reduction.

Q: What packaging format differences exist among the substitute parts?

A: The 5KP160CA variants use P600 axial package (identical to original). The 1.5KE series uses DO-201 package. The P4KE series uses DO-204AL (DO-41) package. The P6KE and SA series use DO-204AC (DO-15) package. Package selection affects PCB footprint and board layout compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: The Littelfuse 5KP series, Taiwan Semiconductor 1.5KE and SA series, and Comchip 1.5KE-G series are ROHS3 compliant. Fairchild P6KE series RoHS status is not specified in available documentation.

Q: What is the operating temperature range for substitute parts?

A: Littelfuse 5KP series, Taiwan Semiconductor 1.5KE and SA series, and Comchip 1.5KE-G series operate from -55°C to 175°C (TJ). Fairchild P6KE series operates from -50°C to 175°C (TJ). Verify temperature range compatibility with your application requirements.

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