3KP22CA-B Equivalent & Substitute Parts

Part Overview

The 3KP22CA-B is a 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 35.5V maximum clamping voltage and 84.5A peak pulse current capability in a through-hole P600 axial package. The part is currently classified as obsolete, making identification of suitable equivalent and substitute components essential for ongoing system support and new design implementations.

Substiute Parts

3KP22CA-B

Littelfuse Inc.In Stock: 10373KP22CA-B Datasheet

Current PartRFQ

5KP22CA-B

Littelfuse Inc.In Stock: 9795KP22CA-B Datasheet

DirectRFQ

3KP22CA-TP

Micro Commercial CoIn Stock: 11473KP22CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP22CA-B is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 22V
• Voltage - Clamping (Max) @ Ipp: 35.5V
• Voltage - Breakdown (Min): 24.4V (or equivalent range)
• Operating Temperature: -55°C ~ 175°C (TJ)
• Type: Zener, Bidirectional

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole
• Package / Case: P600 or R-6 Axial
• Bidirectional Channels: 1

Performance Consideration:

• Current - Peak Pulse (10/1000µs): 84.5A or higher
• Power - Peak Pulse: 3000W (3kW) or higher

Substitute parts must maintain identical voltage specifications and operating temperature range. Peak pulse current and power ratings may be equal or exceed the original specification. Package variants (P600 or R-6) are mechanically compatible within through-hole axial form factors.

Parameter Comparison

Engineering Selection Recommendations

5KP22CA-B (Littelfuse Inc.): This part is the direct electrical equivalent with identical voltage specifications and operating temperature range. It maintains ROHS3 compliance and active product status. The 5KP22CA-B provides enhanced peak pulse current (143.7A) and power dissipation (5kW) compared to the original 3KP22CA-B (84.5A, 3kW), making it suitable for applications requiring equal or greater transient protection capability. The P600 axial package maintains mechanical compatibility with existing through-hole designs.

3KP22CA-TP (Micro Commercial Co): This manufacturer-recommended substitute provides identical electrical performance to the original 3KP22CA-B, with matching voltage specifications, peak pulse current (84.5A), and power dissipation (3kW). The part maintains ROHS3 compliance and active product status. The R-6 axial package is mechanically compatible with P600 through-hole applications. This option is appropriate for direct replacement where performance specifications must remain unchanged.

Both substitutes maintain the required voltage ratings (22V reverse standoff, 35.5V clamping), operating temperature range (-55°C ~ 175°C), and through-hole axial mounting configuration. Selection between these options depends on whether enhanced transient protection capability (5KP22CA-B) or exact performance matching (3KP22CA-TP) is required for the application.

Frequently Asked Questions (FAQ)

Q: Can the 5KP22CA-B be used as a direct replacement for the 3KP22CA-B?

A: Yes. The 5KP22CA-B maintains identical voltage specifications (22V reverse standoff, 35.5V clamping) and operating temperature range (-55°C ~ 175°C). The higher peak pulse current (143.7A vs 84.5A) and power dissipation (5kW vs 3kW) provide enhanced transient protection capability. Both parts use the P600 axial through-hole package and are ROHS3 compliant.

Q: What is the difference between the P600 and R-6 packages?

A: Both P600 and R-6 are axial through-hole package variants. They are mechanically compatible for PCB mounting in through-hole applications. The primary difference is the physical form factor and lead configuration, but both accommodate standard through-hole soldering processes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The 5KP22CA-B and 3KP22CA-TP are both ROHS3 compliant, matching the compliance status of the original 3KP22CA-B.

Q: Can I use the 3KP22CA-TP if I need the exact same performance as the original 3KP22CA-B?

A: Yes. The 3KP22CA-TP provides identical electrical performance with matching peak pulse current (84.5A) and power dissipation (3kW). It maintains the same voltage specifications and operating temperature range. The R-6 package is mechanically compatible with P600 through-hole designs.

Q: Which substitute should I choose for new designs?

A: Selection depends on application requirements. The 5KP22CA-B is suitable for applications requiring enhanced transient protection with higher peak pulse current and power dissipation. The 3KP22CA-TP is appropriate for applications requiring exact performance matching to the original specification. Both parts are active products with established supply availability.