3KP22C Equivalent & Substitute Parts

Part Overview

The 3KP22C is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 22V reverse standoff voltage with a 37.28V maximum clamping voltage and 84.5A peak pulse current capability in a through-hole P600 axial package. The 3KP22C is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

3KP22C

Littelfuse Inc.In Stock: 10593KP22C Datasheet

Current PartRFQ

5KP22CA

Littelfuse Inc.In Stock: 44435KP22CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP22C is determined by the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 22V
• Voltage - Clamping (Max) @ Ipp: Must be compatible with circuit protection requirements
• Current - Peak Pulse (10/1000µs): Must meet or exceed application demands
• Power - Peak Pulse: Must support transient energy dissipation
• Package / Case: P600, Axial (through-hole configuration)
• Bidirectional Channels: 1
• Operating Temperature Range: -55°C ~ 175°C (TJ)

The 5KP22CA qualifies as a direct substitute based on matching reverse standoff voltage (22V), identical package configuration (P600 axial), compatible operating temperature range, and superior electrical performance characteristics including higher peak pulse current (143.7A) and increased power dissipation capability (5000W).

Parameter Comparison

Engineering Selection Recommendations

The 5KP22CA is the recommended substitute for the obsolete 3KP22C. Both components are manufactured by Littelfuse Inc. and maintain identical compliance certifications (ROHS3 Compliant, EAR99 ECCN classification). The 5KP22CA offers superior electrical performance with increased peak pulse current capacity (143.7A versus 84.5A) and higher power dissipation capability (5000W versus 3000W), while maintaining the same reverse standoff voltage (22V) and package configuration (P600 axial through-hole). The 5KP22CA is currently in active production status, ensuring long-term availability and supply chain continuity. The clamping voltage of the 5KP22CA (35.5V) is lower than the 3KP22C (37.28V), providing improved transient suppression performance.

Frequently Asked Questions (FAQ)

Q: Can the 5KP22CA be used as a direct replacement for the 3KP22C in existing designs?

A: Yes. Both components share identical reverse standoff voltage (22V), package configuration (P600 axial), and operating temperature range (-55°C ~ 175°C). The 5KP22CA provides enhanced performance with higher peak pulse current and power dissipation ratings, making it suitable for direct substitution in applications originally designed for the 3KP22C.

Q: What are the key differences between the 3KP22C and 5KP22CA?

A: The primary differences are product status (3KP22C is obsolete; 5KP22CA is active), peak pulse current (84.5A versus 143.7A), power dissipation (3000W versus 5000W), and clamping voltage (37.28V versus 35.5V). The 5KP22CA offers superior transient protection capability while maintaining electrical compatibility.

Q: Are both components available in the same package?

A: Yes. Both the 3KP22C and 5KP22CA use the P600 axial through-hole package configuration, ensuring mechanical and electrical compatibility in PCB designs.

Q: What compliance certifications apply to both parts?

A: Both components are ROHS3 Compliant with EAR99 ECCN classification and Moisture Sensitivity Level 1 (Unlimited). The 5KP22CA additionally carries REACH Unaffected status.

Q: Why does the 5KP22CA have a lower clamping voltage than the 3KP22C?

A: The 5KP22CA's lower maximum clamping voltage (35.5V versus 37.28V) represents improved transient suppression performance. This characteristic, combined with higher peak pulse current capacity, makes the 5KP22CA more effective at protecting downstream circuitry from voltage transients.