Equivalent & Substitute Parts for 5KP180A-B TVS Diode

Part Overview

The 5KP180A-B is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This through-hole component operates across a temperature range of -55°C to 175°C and is RoHS3 compliant. The part is currently active in production with 958 units available in bulk packaging.

Substitute parts are identified when equivalent electrical performance can be achieved within the allowed parameter tolerances for this TVS diode category, considering voltage ratings, clamping characteristics, peak pulse current, and power dissipation capabilities.

Key Parameters

Parameter	5KP180A-B Value	Unit
Voltage - Reverse Standoff (Typ)	180	V
Voltage - Breakdown (Min)	200	V
Voltage - Clamping (Max) @ Ipp	292	V
Current - Peak Pulse (10/1000µs)	17.5	A
Power - Peak Pulse	5000	W
Operating Temperature Range	-55 to 175	°C (TJ)
Mounting Type	Through Hole	-
Package / Case	P600, Axial	-
Type	Zener	-
Unidirectional Channels	1	-

Substitute Part Grouping Explanation

Substitute parts for the 5KP180A-B are grouped based on the following electrical and mechanical criteria:

Primary Substitution Parameters:

Voltage - Reverse Standoff (Typ): 171V to 185V range
Voltage - Breakdown (Min): 190V to 209V range
Voltage - Clamping (Max) @ Ipp: 246V to 328V range
Current - Peak Pulse (10/1000µs): 1.9A to 17.5A range
Power - Peak Pulse: 600W to 5000W range
Mounting Type: Through Hole
Unidirectional Channels: 1
Type: Zener
Operating Temperature: -50°C to 175°C minimum

Substitutes are valid when they maintain unidirectional protection topology, operate within the specified temperature range, and provide equivalent or superior voltage clamping and current handling within the allowed parameter windows for general-purpose TVS applications.

Parameter Comparison

Part Number	Manufacturer	Reverse Standoff (V)	Breakdown Min (V)	Clamping Max @ Ipp (V)	Peak Pulse Current (A)	Peak Pulse Power (W)	Package	Temp Range (°C)
5KP180A-B	Littelfuse Inc.	180	200	292	17.5	5000	P600, Axial	-55 to 175
5KP180A	Littelfuse Inc.	180	200	292	17.5	5000	P600, Axial	-55 to 175
1.5KE200A	Taiwan Semiconductor Corporation	171	190	274	5.7	1500	DO-201AA, Axial	-55 to 175
1.5KE220A	Taiwan Semiconductor Corporation	185	209	328	4.8	1500	DO-201AA, Axial	-55 to 175
P6KE180A	Fairchild Semiconductor	154	171	246	2.5	600	DO-204AC, Axial	-50 to 175
P6KE200A	Fairchild Semiconductor	171	190	274	2.2	600	DO-204AC, Axial	-50 to 175
P6KE220A	Fairchild Semiconductor	185	209	328	1.9	600	DO-204AC, Axial	-50 to 175

Engineering Selection Recommendations

Direct Equivalent (Identical Specifications): The 5KP180A from Littelfuse Inc. is electrically and mechanically identical to the 5KP180A-B, differing only in packaging format (Cut Tape versus Bulk). Both maintain the same P600 axial package, electrical ratings, and RoHS3 compliance status.

Voltage-Matched Substitutes (1.5KE Series): The 1.5KE200A and 1.5KE220A from Taiwan Semiconductor Corporation provide voltage-matched protection with reduced peak pulse current and power ratings. These parts operate within the same temperature range (-55°C to 175°C) and maintain RoHS3 compliance. The 1.5KE220A includes AEC-Q101 automotive qualification.

Lower-Power Substitutes (P6KE Series): The P6KE180A, P6KE200A, and P6KE220A from Fairchild Semiconductor offer voltage-matched protection in a smaller DO-204AC package with reduced power dissipation (600W). These parts operate at a minimum temperature of -50°C and are suitable for applications where lower peak pulse current and power handling are acceptable.

All substitute parts maintain active product status and RoHS3 compliance. Selection depends on application requirements for peak pulse current, power dissipation, package form factor, and minimum operating temperature.

Frequently Asked Questions (FAQ)

Q: Can the 1.5KE200A replace the 5KP180A-B in all applications? A: The 1.5KE200A provides equivalent voltage protection (171V standoff, 190V breakdown minimum, 274V clamping) but with reduced peak pulse current (5.7A versus 17.5A) and power dissipation (1500W versus 5000W). Substitution is valid only when application peak pulse current does not exceed 5.7A.

Q: What is the difference between the 5KP180A-B and 5KP180A? A: Both parts are electrically and mechanically identical. The 5KP180A-B is supplied in Bulk packaging, while the 5KP180A is available in Cut Tape format. All electrical specifications, temperature range, and compliance certifications are identical.

Q: Are the P6KE series parts suitable replacements? A: The P6KE series (P6KE180A, P6KE200A, P6KE220A) provide voltage-matched protection but with significantly lower peak pulse current (1.9A to 2.5A) and power dissipation (600W). These parts are suitable only for applications with lower transient energy requirements. The minimum operating temperature is -50°C instead of -55°C.

Q: What determines whether a substitute part is acceptable? A: Substitution validity is determined by: (1) Reverse standoff voltage within 171V to 185V range, (2) Breakdown voltage minimum between 190V and 209V, (3) Peak pulse current capability meeting or exceeding application requirements, (4) Power dissipation rating meeting or exceeding application requirements, (5) Operating temperature range encompassing -55°C to 175°C, and (6) Unidirectional zener topology with single channel configuration.

Q: Can I use a P6KE part in place of a 5KP part? A: Package compatibility requires verification. The 5KP180A-B uses P600 axial packaging, while P6KE parts use DO-204AC (DO-15) axial packaging. Both are through-hole axial components, but physical dimensions and PCB footprints differ. Mechanical substitution requires board redesign or adapter consideration.

Q: Are all substitute parts RoHS3 compliant? A: Yes. The 5KP180A-B, 5KP180A, 1.5KE200A, 1.5KE220A, and all P6KE series parts listed are RoHS3 compliant.

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