3KP220CA Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The 3KP220CA is a unidirectional Zener-type transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. It features a 220V reverse standoff voltage with a maximum clamping voltage of 371.1V at peak pulse current and delivers 3kW peak pulse power handling capability in a through-hole P600 axial package.

The 3KP220CA is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Substiute Parts

3KP220CA

Littelfuse Inc.In Stock: 7223KP220CA Datasheet

Current PartRFQ

5KP220CA

Littelfuse Inc.In Stock: 14085KP220CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3KP220CA is determined by the following critical parameters:

• Voltage Rating Match: Reverse standoff voltage of 220V and breakdown voltage minimum of 244V
• Clamping Voltage Compatibility: Maximum clamping voltage of 371.1V at peak pulse current
• Package Compatibility: P600 axial through-hole package for direct board-level replacement
• Unidirectional Configuration: Single bidirectional channel (1 channel)
• Environmental Compliance: ROHS3 compliance and MSL 1 rating

The 5KP220CA meets all substitution criteria. It maintains identical voltage ratings, clamping characteristics, and package specifications while offering enhanced current handling and power dissipation capabilities. Both devices are manufactured by Littelfuse Inc. and share the same electrical protection characteristics required for general-purpose TVS applications.

Parameter Comparison

Engineering Selection Recommendations

The 5KP220CA is the qualified substitute for the obsolete 3KP220CA. Both components maintain identical voltage protection characteristics (220V standoff, 244V breakdown minimum, 371.1V clamping maximum) and share the same P600 axial through-hole package, enabling direct board-level replacement without design modification.

The 5KP220CA offers superior performance margins with 13.7A peak pulse current capacity and 5kW peak pulse power handling compared to the 3KP220CA specifications of 8.1A and 3kW respectively. This enhanced capability provides additional transient protection margin without compromising compatibility.

Both devices are ROHS3 compliant with MSL 1 rating and operate across the identical temperature range of -55°C to 175°C. The 5KP220CA is currently in active production status, ensuring long-term component availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the 5KP220CA be used as a direct replacement for the 3KP220CA?

A: Yes. The 5KP220CA is a direct substitute. Both devices share identical voltage ratings (220V standoff, 244V breakdown, 371.1V clamping), unidirectional configuration, and P600 axial through-hole package. No circuit modifications are required.

Q: What are the key differences between these two parts?

A: The primary differences are peak pulse current capacity (5KP220CA: 13.7A vs. 3KP220CA: 8.1A) and peak pulse power dissipation (5KP220CA: 5kW vs. 3KP220CA: 3kW). The 5KP220CA provides enhanced transient protection capability while maintaining identical voltage protection characteristics.

Q: Why is the 3KP220CA obsolete?

A: The 3KP220CA has been discontinued by Littelfuse Inc. The 5KP220CA represents the current production equivalent with superior performance specifications.

Q: Are there any package or mounting differences?

A: No. Both devices use the P600 axial through-hole package. Physical dimensions and board-level mounting are identical, enabling direct PCB replacement without layout modifications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 3KP220CA and 5KP220CA are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level) rating. Environmental and regulatory compliance requirements are equivalent.

Q: What is the operating temperature range for these devices?

A: Both devices operate across -55°C to 175°C junction temperature range, providing identical thermal performance specifications for general-purpose TVS applications.