3KP7.0CA-B Equivalent & Substitute Parts

Part Overview

The 3KP7.0CA-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage protection applications. This component features a 7V reverse standoff voltage with 12V maximum clamping voltage and 250A peak pulse current capability. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

3KP7.0CA-B

Littelfuse Inc.In Stock: 8263KP7.0CA-B Datasheet

Current PartRFQ

5KP7.0CA-B

Littelfuse Inc.In Stock: 7585KP7.0CA-B Datasheet

DirectRFQ

3KP7.0CA-TP

Micro Commercial CoIn Stock: 7473KP7.0CA-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3KP7.0CA-B are identified based on strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

• Voltage - Reverse Standoff: 7V (exact match required)
• Voltage - Breakdown (Min): 7.78V (exact match required)
• Voltage - Clamping (Max) @ Ipp: 12V (exact match required)
• Operating Temperature Range: -55°C ~ 175°C (exact match required)
• Mounting Type: Through Hole (exact match required)
• Type: Zener (exact match required)
• Bidirectional Channels: 1 (exact match required)

Acceptable Variation Parameters:

• Current - Peak Pulse: Equal to or greater than 250A
• Power - Peak Pulse: Equal to or greater than 3000W
• Package / Case: P600 or R-6 axial packages (both through-hole axial configurations)
• Manufacturer: Different manufacturers acceptable if all electrical parameters match

Parameter Comparison

Engineering Selection Recommendations

5KP7.0CA-B (Littelfuse Inc.): This substitute is the preferred option for new designs and procurement. It maintains identical electrical specifications to the 3KP7.0CA-B while offering enhanced current and power handling capabilities (425A vs. 250A; 5kW vs. 3kW). The part is currently in active production status with ROHS3 compliance confirmed. The P600 axial package provides direct mechanical compatibility with existing through-hole PCB layouts.

3KP7.0CA-TP (Micro Commercial Co): This substitute provides electrical equivalence with identical voltage, current, and power specifications to the 3KP7.0CA-B. The part is in active production status. The R-6 axial package differs from the P600 package but maintains through-hole mounting compatibility. This option is suitable for applications where package footprint variation is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the 5KP7.0CA-B be used as a direct replacement for the 3KP7.0CA-B?

A: Yes. The 5KP7.0CA-B meets all electrical parameter requirements of the 3KP7.0CA-B. The increased current rating (425A vs. 250A) and power dissipation (5kW vs. 3kW) provide enhanced performance margin without affecting circuit compatibility. The P600 package is mechanically identical.

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

A: Both P600 and R-6 are through-hole axial packages for TVS diodes. The packages differ in physical dimensions and lead spacing. Component selection should verify PCB footprint compatibility with the specific package variant.

Q: Why is the 3KP7.0CA-B listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The 5KP7.0CA-B and 3KP7.0CA-TP are active alternatives that provide equivalent or enhanced electrical performance for continued design support.

Q: Are there any compliance differences between the substitute parts?

A: The 5KP7.0CA-B and 3KP7.0CA-B both carry ROHS3 compliance certification. The 3KP7.0CA-TP RoHS status is not specified in available documentation. All three parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.

Q: Can I use the 3KP7.0CA-TP if the 5KP7.0CA-B is unavailable?

A: Yes. The 3KP7.0CA-TP provides identical electrical specifications to the 3KP7.0CA-B. Package compatibility with existing PCB layouts must be verified due to the R-6 vs. P600 package difference.