3KP30CA-B Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The 3KP30CA-B is a through-hole Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 30V reverse standoff voltage with a 48.4V maximum clamping voltage and 62A peak pulse current capability. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

3KP30CA-B

Littelfuse Inc.In Stock: 11403KP30CA-B Datasheet

Current PartRFQ

5KP30CA-B

LittelfuseIn Stock: 12045KP30CA-B Datasheet

DirectRFQ

3KP30CA-TP

Micro Commercial CoIn Stock: 11133KP30CA-TP Datasheet

MFR RecommendedRFQ

5KP30CA-TP

Micro Commercial CoIn Stock: 340395KP30CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3KP30CA-B are identified based on strict electrical and mechanical parameter matching within the TVS diode category. The primary substitution criteria are:

• Voltage - Reverse Standoff: 30V (exact match required)
• Voltage - Clamping (Max) @ Ipp: 48.4V (exact match required)
• Operating Temperature Range: -55°C ~ 175°C (exact match required)
• Mounting Type: Through Hole (exact match required)
• Type: Zener, Bidirectional Channels: 1 (exact match required)

Substitute parts are grouped into two categories based on package compatibility and manufacturer:

Category 1: Same Package (P600, Axial) – Direct mechanical and electrical substitutes with identical package specifications.

Category 2: Alternative Package (R-6, Axial) – Functionally equivalent parts with different axial package geometry, requiring mechanical re-evaluation for board layout compatibility.

Parameter Comparison

Engineering Selection Recommendations

5KP30CA-B (Littelfuse) – This part is the primary substitute for the obsolete 3KP30CA-B. It maintains identical electrical parameters (30V standoff, 48.4V clamping) and package specification (P600, Axial). The 5KP30CA-B is in active production status with ROHS3 compliance certification. The increased peak pulse current (105.4A) and power rating (5kW) provide enhanced transient protection capability without compromising compatibility with the original design.

3KP30CA-TP (Micro Commercial Co) – This part provides electrical equivalence with matching voltage and power specifications (3kW). It is in active production status. The package differs (R-6 instead of P600), requiring mechanical re-evaluation of board layout and component spacing. This option is suitable when package geometry constraints permit the alternative axial form factor.

5KP30CA-TP (Micro Commercial Co) – This part offers enhanced power handling (5kW) with electrical parameter equivalence in voltage ratings. It is in active production status with ROHS3 compliance. The R-6 package requires mechanical compatibility assessment. Peak pulse current is not specified in available documentation.

Frequently Asked Questions (FAQ)

Q: Can 5KP30CA-B replace 3KP30CA-B in existing designs?

A: Yes. The 5KP30CA-B maintains all critical electrical parameters (30V standoff, 48.4V clamping, -55°C to 175°C operating range) and identical P600 axial package geometry. The increased current and power ratings provide equivalent or superior protection without design modification.

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

A: Both are through-hole axial packages for TVS diodes. P600 and R-6 differ in physical dimensions and lead spacing. Component substitution between these packages requires verification of board layout compatibility, hole spacing, and component clearance.

Q: Are Micro Commercial Co parts direct replacements for Littelfuse parts?

A: Micro Commercial Co parts with matching electrical specifications (voltage, current, temperature range) are functionally equivalent. Verify package compatibility (P600 vs. R-6) and confirm compliance certifications for your application requirements.

Q: Why does 5KP30CA-TP show no peak pulse current specification?

A: The peak pulse current parameter is not provided in the available technical documentation for this part number. Contact the manufacturer or distributor for complete electrical specifications before design implementation.

Q: Is RoHS compliance required for my application?

A: RoHS compliance is application-dependent. The 3KP30CA-B, 5KP30CA-B, and 5KP30CA-TP are ROHS3 compliant. Verify your design requirements and regulatory obligations before part selection.