3KP30C-B Equivalent & Substitute Parts

Part Overview

The 3KP30C-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage transient protection applications. This component features a 30V reverse standoff voltage with a 50.82V maximum clamping voltage and 62A peak pulse current capability in a through-hole P600 axial package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

3KP30C-B

Littelfuse Inc.In Stock: 9213KP30C-B Datasheet

Current PartRFQ

5KP30CA-B

LittelfuseIn Stock: 12045KP30CA-B Datasheet

DirectRFQ

30KP30CA-TP

Micro Commercial CoIn Stock: 80630KP30CA-TP Datasheet

MFR RecommendedRFQ

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

Substitution eligibility for the 3KP30C-B is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): Must be 30V
• Mounting Type: Must be Through Hole
• Type: Must be Zener
• Bidirectional Channels: Must be 1
• Operating Temperature Range: Must support -55°C to 175°C (TJ)
• Package Compatibility: P600 or R-6 axial packages are mechanically compatible

The substitute parts identified maintain the core voltage protection specification (30V standoff) and thermal operating range. Variations in clamping voltage, peak pulse current, and power dissipation are permitted within the constraints of the application circuit, provided the reverse standoff voltage and thermal characteristics remain consistent.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 3KP30CA-TP (Micro Commercial Co)

The 3KP30CA-TP provides the closest electrical and mechanical match to the 3KP30C-B. It maintains identical reverse standoff voltage (30V), peak pulse current (62A), and power dissipation (3000W) specifications. The part is currently in active production status with REACH compliance documentation available. The R-6 axial package is mechanically compatible with P600 footprints in through-hole applications. This part is recommended as the primary direct replacement.

Secondary Substitute: 5KP30CA-B (Littelfuse)

The 5KP30CA-B, also from Littelfuse, offers enhanced performance characteristics with 105.4A peak pulse current and 5000W power dissipation while maintaining the 30V reverse standoff voltage. This part remains in active production and carries ROHS3 compliance. The P600 package provides identical mechanical compatibility. Selection of this part is appropriate when circuit design permits higher transient current handling.

Alternative Substitute: 30KP30CA-TP (Micro Commercial Co)

The 30KP30CA-TP is suitable for applications requiring significantly higher power dissipation (30000W) while maintaining the 30V standoff voltage specification. This part is in active production with REACH compliance. The R-6 axial package is mechanically compatible. Selection is appropriate only when circuit analysis confirms the need for enhanced power handling capability.

Tertiary Substitute: 5KP30CA-TP (Micro Commercial Co)

The 5KP30CA-TP provides 5000W power dissipation with 30V reverse standoff voltage. This part is in active production with extensive inventory availability (33,943 pcs) and ROHS3 compliance. The R-6 axial package is mechanically compatible. Selection is appropriate when higher transient current capacity is beneficial and package form factor is not a constraint.

All substitute parts maintain compliance with RoHS3 and REACH requirements where specified, and all operate within the -55°C to 175°C temperature range of the original component.

Frequently Asked Questions (FAQ)

Q: Can I use 5KP30CA-B as a direct replacement for 3KP30C-B?

A: Yes. Both parts maintain the 30V reverse standoff voltage, through-hole mounting, and -55°C to 175°C operating temperature range. The 5KP30CA-B offers higher peak pulse current (105.4A vs. 62A) and power dissipation (5000W vs. 3000W), making it suitable for applications where the original 3KP30C-B was specified, provided circuit design permits the enhanced performance characteristics.

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

A: Both P600 and R-6 are axial through-hole packages formats for TVS diodes. They are mechanically compatible in standard through-hole PCB applications. The primary difference is the physical form factor and lead spacing. Selection between them depends on PCB layout constraints and available footprint space.

Q: Why is the 3KP30C-B marked as obsolete?

A: The 3KP30C-B is no longer in active production by Littelfuse Inc. The substitute parts listed (3KP30CA-TP, 5KP30CA-B, 5KP30CA-TP, and 30KP30CA-TP) are currently manufactured and represent the active product line alternatives that meet the same functional requirements.

Q: Are all substitute parts RoHS3 compliant?

A: The 5KP30CA-B, 30KP30CA-TP, and 5KP30CA-TP are confirmed ROHS3 compliant. The 3KP30CA-TP RoHS status is not specified in available documentation. Verify RoHS compliance requirements with your procurement or quality assurance department before final part selection.

Q: Can I use the 30KP30CA-TP in place of the 3KP30C-B?

A: Yes, from an electrical standpoint. The 30KP30CA-TP maintains the 30V reverse standoff voltage and operating temperature range. However, it provides significantly higher power dissipation capability (30000W vs. 3000W). Use this part only when circuit analysis confirms the application benefits from or requires this enhanced power handling. Oversizing transient protection components unnecessarily may introduce undesired circuit behavior.

Q: What inventory status should I consider when selecting a substitute?

A: All substitute parts listed are in active production with confirmed inventory availability. The 5KP30CA-TP has the highest inventory level (33,943 pcs), followed by 5KP30CA-B (1,144 pcs), 3KP30CA-TP (1,021 pcs), and 30KP30CA-TP (723 pcs). Inventory levels may change; verify current availability with your component supplier.

Q: Do all substitute parts have the same clamping voltage as the original 3KP30C-B?

A: No. The 3KP30C-B has a maximum clamping voltage of 50.82V. Substitute parts vary: 5KP30CA-B and 5KP30CA-TP are 48.4V, 3KP30CA-TP is 48.4V, and 30KP30CA-TP is 55.2V. All maintain the 30V reverse standoff voltage. Verify that the clamping voltage of your selected substitute is acceptable for your circuit protection requirements.