Littelfuse 5KP220 Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The Littelfuse 5KP220 is a unidirectional Zener-type transient voltage suppressor (TVS) diode designed for general-purpose overvoltage protection applications. This component features a 220V reverse standoff voltage rating and 5000W peak pulse power handling capability in a through-hole P600 axial package.

The 5KP220 is classified as obsolete. Identifying suitable equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

Substiute Parts

5KP220

Littelfuse Inc.In Stock: 7175KP220 Datasheet

Current PartRFQ

5KP220A

Littelfuse Inc.In Stock: 18145KP220A Datasheet

DirectRFQ

1.5KE250A

Taiwan Semiconductor CorporationIn Stock: 79171.5KE250A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP220 is determined by the following critical parameters:

• Reverse Standoff Voltage (Vwm): Must be 220V to maintain circuit protection thresholds
• Breakdown Voltage (Vbr): Must fall within the specified minimum range to ensure predictable triggering behavior
• Clamping Voltage (Vc): Must not exceed the maximum specified value to prevent downstream component damage
• Peak Pulse Power Rating: Must be sufficient to handle transient energy without thermal failure
• Operating Temperature Range: Must encompass the application's thermal requirements
• Mounting Type & Package: Must be compatible with through-hole PCB assembly processes

Two substitute parts are identified:

1. 5KP220A (Littelfuse Inc.) — Direct manufacturer equivalent with active product status
2. 1.5KE250A (Taiwan Semiconductor Corporation) — Manufacturer-recommended alternative with different electrical characteristics

Parameter Comparison

Engineering Selection Recommendations

5KP220A (Littelfuse Inc.) is the primary substitute for the obsolete 5KP220. Both components share identical reverse standoff voltage, operating temperature range, power rating, and package specifications. The 5KP220A maintains active product status with ROHS3 compliance and unlimited moisture sensitivity rating, ensuring long-term supply chain viability and regulatory compliance.

1.5KE250A (Taiwan Semiconductor Corporation) is a manufacturer-recommended alternative suitable for applications where the lower peak pulse power rating (1500W versus 5000W) is acceptable. This part exhibits a lower clamping voltage (344V) and reduced peak pulse current (4.5A), making it appropriate for lower-energy transient protection scenarios. The reverse standoff voltage (214V) is slightly lower than the 5KP220 specification, requiring circuit-level validation before implementation.

Selection between these substitutes depends on application power requirements and transient energy levels. The 5KP220A is recommended as the direct replacement for existing 5KP220 designs. The 1.5KE250A should be considered only when application requirements permit reduced power handling and lower clamping voltage characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 5KP220A be used as a direct drop-in replacement for the 5KP220?

A: Yes. The 5KP220A shares identical reverse standoff voltage (220V), peak pulse power rating (5000W), operating temperature range (-55°C to 175°C), and P600 axial package specifications. No circuit modifications are required.

Q: What are the key differences between the 5KP220A and 1.5KE250A?

A: The 5KP220A maintains the original 5000W power rating and 220V standoff voltage. The 1.5KE250A has a reduced 1500W power rating, lower standoff voltage (214V), and different package designation (DO-201AA versus P600). The 1.5KE250A is suitable only for lower-energy transient protection applications.

Q: Are all three parts RoHS compliant?

A: Yes. The 5KP220, 5KP220A, and 1.5KE250A are all ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity).

Q: Does the 1.5KE250A require PCB layout modifications?

A: The 1.5KE250A uses a DO-201AA package versus the P600 package of the 5KP220. Physical footprint differences may require PCB redesign. Verify package dimensions and lead spacing compatibility before implementation.

Q: Which substitute part should be selected for new designs?

A: The 5KP220A is recommended for new designs requiring equivalent performance to the original 5KP220. The 1.5KE250A should be considered only when application requirements permit reduced power handling and lower voltage clamping characteristics.