5KP180 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 5KP180 is a unidirectional Zener-type transient voltage suppressor manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This part features a 180V reverse standoff voltage, 306.6V maximum clamping voltage, and 5000W peak pulse power rating in a through-hole P600 axial package.

The 5KP180 is classified as obsolete. Equivalent and substitute parts are available from multiple manufacturers with active product status, offering comparable or enhanced electrical characteristics while maintaining compatibility with standard through-hole PCB designs.

Key Parameters

Parameter	5KP180 Value
Voltage - Reverse Standoff (Typ)	180V
Voltage - Breakdown (Min)	189.45V
Voltage - Clamping (Max) @ Ipp	306.6V
Current - Peak Pulse (10/1000µs)	Not specified
Power - Peak Pulse	5000W (5kW)
Operating Temperature Range	-55°C to 175°C (TJ)
Mounting Type	Through Hole
Package / Case	P600, Axial
Type	Zener
Unidirectional Channels	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 5KP180 is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff: 180V nominal (acceptable range: 154V to 185V based on available alternatives)
Voltage - Clamping (Max) @ Ipp: Must not exceed 328V to maintain overvoltage protection margin
Power - Peak Pulse: Minimum 1500W; 5000W preferred for direct replacement
Type: Zener unidirectional TVS diode
Unidirectional Channels: 1
Operating Temperature: -55°C to 175°C minimum
Mounting Type: Through Hole
RoHS Status: ROHS3 Compliant

Package Compatibility: The 5KP180 uses P600 axial package. Substitutes are available in P600 (direct package match), DO-201 (larger axial), and DO-204AC/DO-15 (smaller axial) packages. Package selection depends on PCB layout constraints and current handling requirements.

Voltage Range Flexibility: Substitutes with standoff voltages between 154V and 185V are acceptable for general-purpose protection circuits. Clamping voltage variations reflect different power ratings and current handling capabilities.

Parameter Comparison

Part Number	Manufacturer	Standoff Voltage (V)	Breakdown Min (V)	Clamp Voltage Max (V)	Peak Pulse Current (A)	Power Rating (W)	Package	Status
5KP180	Littelfuse Inc.	180	189.45	306.6	Not specified	5000	P600	Obsolete
5KP180A	Littelfuse Inc.	180	200	292	17.5	5000	P600	Active
1.5KE180A	Taiwan Semiconductor Corporation	154	171	246	6.4	1500	DO-201	Active
1.5KE200A	Taiwan Semiconductor Corporation	171	190	274	5.7	1500	DO-201	Active
1.5KE220A	Taiwan Semiconductor Corporation	185	209	328	4.8	1500	DO-201	Active
P4KE180A	Taiwan Semiconductor Corporation	154	171	246	1.7	400	DO-204AL	Active
P4KE200A	Good-Ark Semiconductor	171	190	274	1.5	400	DO-204AL	Active
P4KE220A	Taiwan Semiconductor Corporation	185	209	328	1.3	400	DO-204AL	Active
P6KE180A	Fairchild Semiconductor	154	171	246	2.5	600	DO-204AC	Active
P6KE200A	Fairchild Semiconductor	171	190	274	2.2	600	DO-204AC	Active
P6KE220A	Fairchild Semiconductor	185	209	328	1.9	600	DO-204AC	Active

Engineering Selection Recommendations

Direct Package Replacement (P600 Axial): The 5KP180A from Littelfuse Inc. is the primary substitute, maintaining identical package geometry and 5000W power rating. This part is active and ROHS3 compliant with 300,400 units in stock. Electrical parameters are nearly identical with 180V standoff voltage and 292V clamping voltage.

Higher Power Density Alternatives (DO-201 Package): The 1.5KE series from Taiwan Semiconductor Corporation offers 1500W power rating in DO-201 axial package. These parts are AEC-Q101 qualified (1.5KE220A) and suitable for applications where package size reduction is acceptable. Standoff voltages range from 154V to 185V, covering the 180V nominal requirement.

Compact Alternatives (DO-204AL and DO-204AC Packages): The P4KE series (400W, DO-204AL) and P6KE series (600W, DO-204AC) provide smaller form factors for space-constrained designs. These are suitable only for applications with lower peak pulse current requirements. All are ROHS3 compliant and active products.

Compliance and Availability: All substitute parts listed are ROHS3 compliant and have active product status. The 5KP180A offers the highest inventory availability (300,400 units) and maintains full electrical and mechanical compatibility with the obsolete 5KP180.

Frequently Asked Questions (FAQ)

Q: Can I use 1.5KE180A as a direct replacement for 5KP180? A: The 1.5KE180A is electrically compatible but uses a different package (DO-201 vs. P600). PCB layout modifications are required. The 1.5KE180A has lower power rating (1500W vs. 5000W) and lower peak pulse current (6.4A vs. unspecified), making it suitable only for lower-energy transient applications.

Q: What is the difference between P4KE and P6KE series substitutes? A: Both series use smaller packages than the original 5KP180. The P6KE series offers 600W power rating compared to P4KE's 400W, with correspondingly higher peak pulse current ratings. Both are suitable for compact designs with moderate transient energy levels.

Q: Is the 5KP180A a true equivalent or a substitute? A: The 5KP180A is a direct equivalent. It maintains the same package (P600), power rating (5000W), standoff voltage (180V), and operating temperature range. It is the recommended replacement for the obsolete 5KP180.

Q: Can I substitute a 1.5KE220A for 5KP180 in a 180V protection circuit? A: The 1.5KE220A has a 185V standoff voltage, which is within acceptable tolerance for 180V nominal circuits. However, the higher clamping voltage (328V vs. 306.6V) and lower power rating (1500W vs. 5000W) must be evaluated against circuit transient energy specifications.

Q: Are all listed substitutes ROHS3 compliant? A: Yes. All substitute parts listed meet ROHS3 compliance requirements. Compliance status is verified for each part in the parameter comparison table.

Q: What package should I choose for a new design? A: For new designs, the 5KP180A (P600) is recommended if transient energy exceeds 1500W. For lower-energy applications, the 1.5KE series (DO-201) offers better thermal performance in a standard axial package. The P4KE and P6KE series are suitable only for compact, low-energy designs.

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