3KP14CA-B Equivalent & Substitute Parts

Part Overview

The 3KP14CA-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage transient protection applications. This bidirectional zener diode features a 14V reverse standoff voltage and 23.2V maximum clamping voltage with 129.3A 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

3KP14CA-B

Littelfuse Inc.In Stock: 9753KP14CA-B Datasheet

Current PartRFQ

5KP14CA-B

Littelfuse Inc.In Stock: 8915KP14CA-B Datasheet

DirectRFQ

3KP14CA-TP

Micro Commercial CoIn Stock: 8553KP14CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3KP14CA-B are identified based on strict electrical and mechanical parameter compatibility. The primary substitution criteria are:

• Voltage - Reverse Standoff: 14V (identical)
• Voltage - Clamping (Max) @ Ipp: 23.2V (identical)
• Voltage - Breakdown (Min): 15.6V (identical)
• Operating Temperature Range: -55°C to 175°C (identical)
• Mounting Type: Through Hole (identical)
• Bidirectional Channels: 1 (identical)
• Type: Zener (identical)

Substitutes are grouped into two categories: direct manufacturer alternatives and manufacturer-recommended equivalents. Current-handling capability (Peak Pulse Current) and power dissipation may vary within the same voltage class, provided the substitute meets or exceeds the minimum electrical performance requirements of the original design.

Parameter Comparison

Engineering Selection Recommendations

5KP14CA-B (Direct Substitute - Littelfuse Inc.)

The 5KP14CA-B is an active product from the same manufacturer with identical voltage specifications and operating temperature range. This substitute provides enhanced peak pulse current capability (219.8A versus 129.3A) and higher power dissipation (5000W versus 3000W), making it suitable for applications requiring greater transient energy absorption. The P600 axial package maintains mechanical compatibility with existing through-hole PCB layouts. ROHS3 compliance and MSL-1 rating are confirmed. This substitute is recommended for new designs and ongoing production support where the original 3KP14CA-B is no longer available.

3KP14CA-TP (Manufacturer-Recommended Equivalent - Micro Commercial Co)

The 3KP14CA-TP is an active product from Micro Commercial Co with identical voltage and current specifications to the original 3KP14CA-B. This substitute maintains the same 129.3A peak pulse current and 3000W power dissipation. The R-6 axial package is mechanically compatible with through-hole PCB designs, though package dimensions may differ slightly from the P600 variant. REACH compliance is confirmed. This substitute provides a direct electrical equivalent for applications where current and power ratings match the original design requirements.

Frequently Asked Questions (FAQ)

Q: Can the 5KP14CA-B be used as a direct replacement for the 3KP14CA-B?

A: Yes. The 5KP14CA-B meets all electrical requirements of the 3KP14CA-B with identical voltage specifications (14V standoff, 23.2V clamping). The higher current rating (219.8A) and power dissipation (5000W) provide enhanced protection capability. Both parts use the P600 axial through-hole package and operate across the same temperature range (-55°C to 175°C).

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

A: Both P600 and R-6 are axial through-hole packages for TVS diodes. The primary difference is physical dimensions. Both are suitable for through-hole PCB mounting. Verify PCB footprint compatibility before substitution if package dimensions are critical to your layout.

Q: Are all three parts RoHS compliant?

A: The 3KP14CA-B and 5KP14CA-B are confirmed ROHS3 compliant. RoHS status for the 3KP14CA-TP is not specified in available documentation.

Q: Which substitute should I select for new designs?

A: Selection depends on application requirements. If your circuit requires only 129.3A peak pulse current and 3000W power dissipation, either the 5KP14CA-B or 3KP14CA-TP is suitable. If higher transient energy absorption is beneficial, the 5KP14CA-B (5000W) is preferred. Both are active products with confirmed availability.

Q: Can I use these substitutes interchangeably in existing assemblies?

A: Electrical interchangeability is confirmed for all three parts based on voltage specifications and operating temperature range. Mechanical compatibility depends on PCB footprint design. Verify that the selected package (P600 or R-6) fits your through-hole layout before implementation.