3KP220A-B Equivalent & Substitute Parts

Part Overview

The 3KP220A-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 220V reverse standoff voltage with a maximum clamping voltage of 371.1V at peak pulse current. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

3KP220A-B

Littelfuse Inc.In Stock: 12253KP220A-B Datasheet

Current PartRFQ

5KP220A-B

Littelfuse Inc.In Stock: 10705KP220A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP220A-B is determined by strict equivalence in the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 220V
• Voltage - Breakdown (Min): 244V
• Voltage - Clamping (Max) @ Ipp: 371.1V
• Unidirectional Channels: 1
• Mounting Type: Through Hole
• Package / Case: P600, Axial
• Operating Temperature Range: -55°C ~ 175°C (TJ)

The 5KP220A-B qualifies as a direct substitute based on matching all critical voltage parameters and physical form factor. While the 5KP220A-B exhibits higher peak pulse current (13.7A versus 8.1A) and greater peak pulse power (5000W versus 3000W), these represent enhanced performance characteristics within the same voltage protection class and do not compromise compatibility in applications designed for the 3KP220A-B.

Parameter Comparison

Engineering Selection Recommendations

The 5KP220A-B is the primary substitute for the obsolete 3KP220A-B. Both components maintain identical voltage protection characteristics (220V standoff, 244V breakdown minimum, 371.1V maximum clamping) and share the same P600 axial through-hole package. The 5KP220A-B carries Active product status, ensuring continued availability and supply chain support.

The 5KP220A-B provides enhanced performance margins with higher peak pulse current (13.7A) and power dissipation (5000W), making it suitable for applications where the original 3KP220A-B was specified. Both components are ROHS3 compliant and operate across the identical temperature range (-55°C to 175°C junction temperature).

Frequently Asked Questions (FAQ)

Q: Can the 5KP220A-B directly replace the 3KP220A-B in existing designs?

A: Yes. The 5KP220A-B maintains identical voltage protection parameters (220V standoff, 244V breakdown, 371.1V clamping) and physical form factor (P600 axial through-hole package). The higher current and power ratings of the 5KP220A-B do not create compatibility issues in applications designed for the 3KP220A-B.

Q: What is the primary reason for substitution?

A: The 3KP220A-B is classified as obsolete. The 5KP220A-B is an active product from the same manufacturer with identical voltage specifications and package configuration, ensuring long-term availability and supply continuity.

Q: Are there any thermal or mounting differences between these parts?

A: No. Both components operate across -55°C to 175°C junction temperature and use identical P600 axial through-hole mounting. PCB layout and thermal management considerations remain unchanged.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 3KP220A-B and 5KP220A-B are ROHS3 compliant, meeting equivalent environmental and regulatory requirements.

Q: What is the significance of the higher peak pulse current in the 5KP220A-B?

A: The 5KP220A-B offers 13.7A peak pulse current compared to 8.1A in the 3KP220A-B, with corresponding power dissipation of 5000W versus 3000W. This represents enhanced performance capability within the same voltage class and does not affect compatibility in existing circuit designs.