Equivalent & Substitute Parts for 3KP24C-B TVS Diode

Part Overview

The 3KP24C-B is a 24V Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This component features a through-hole P600 axial package with a peak pulse power rating of 3kW and operates across a temperature range of -55°C to 175°C. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations.

Substiute Parts

3KP24C-B

Littelfuse Inc.In Stock: 10073KP24C-B Datasheet

Current PartRFQ

5KP24CA-B

LittelfuseIn Stock: 11795KP24CA-B Datasheet

DirectRFQ

15KP24CA-TP

Micro Commercial CoIn Stock: 116015KP24CA-TP Datasheet

MFR RecommendedRFQ

15KPA24CAE3/TR13

Microchip TechnologyIn Stock: 100815KPA24CAE3/TR13 Datasheet

MFR RecommendedRFQ

15KPA24CE3/TR13

Microchip TechnologyIn Stock: 77115KPA24CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3KP24C-B is determined by the following critical parameters:

• Voltage Rating: Reverse standoff voltage of 24V is the primary selection criterion. All substitute parts maintain this 24V rating.
• Package Type: Through-hole axial mounting (P600 or R-6) ensures mechanical and electrical compatibility with existing PCB layouts.
• Operating Temperature Range: All substitutes maintain the -55°C to 175°C operating range.
• Regulatory Compliance: ROHS3 compliance and MSL rating of 1 are maintained across all alternatives.
• Power Dissipation: Peak pulse power ratings range from 3kW to 15kW, with higher ratings providing enhanced transient protection capability.

The substitute parts are grouped into two categories: direct replacements with equivalent power ratings (5KP series) and higher-performance alternatives with increased power dissipation (15KP series).

Parameter Comparison

Engineering Selection Recommendations

5KP24CA-B (Littelfuse): This part is the primary direct substitute for the 3KP24C-B. It maintains identical voltage ratings, operating temperature range, and P600 axial package configuration. The 5KP24CA-B is in active production status and offers increased peak pulse current (131.1A versus 77.1A) and higher power dissipation (5kW versus 3kW), providing enhanced transient protection margins. ROHS3 compliance and MSL rating of 1 are maintained.

15KP24CA-TP (Micro Commercial Co): This part offers superior transient protection with 15kW peak pulse power rating. It maintains the 24V voltage rating and -55°C to 175°C operating temperature range. The R-6 axial package is mechanically compatible with through-hole PCB layouts, though the package footprint differs from the P600. This option is suitable for applications requiring higher transient energy absorption.

15KPA24CAE3/TR13 and 15KPA24CE3/TR13 (Microchip Technology): Both parts provide 15kW peak pulse power dissipation with P600 axial packaging, maintaining identical mechanical compatibility with the original 3KP24C-B. The 15KPA24CAE3/TR13 specifies 371A peak pulse current and 40.7V clamping voltage. Both are in active production status with ROHS3 compliance and MSL rating of 1.

All substitute parts are ROHS3 compliant and carry MSL rating of 1, meeting regulatory requirements equivalent to the original component.

Frequently Asked Questions (FAQ)

Q: Can the 5KP24CA-B directly replace the 3KP24C-B in existing designs?

A: Yes. The 5KP24CA-B maintains identical voltage ratings (24V reverse standoff), operating temperature range (-55°C to 175°C), and P600 axial package configuration. The increased power dissipation (5kW versus 3kW) provides additional transient protection margin without requiring circuit modifications.

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

A: Both are through-hole axial packages suitable for PCB mounting. The P600 and R-6 differ in physical dimensions and lead spacing. The 15KP24CA-TP uses the R-6 package, which may require PCB layout verification to confirm compatibility with existing component footprints.

Q: Why do some substitute parts have higher power ratings?

A: The 15KP series parts (15kW) provide greater transient energy absorption capability compared to the 3KP24C-B (3kW) and 5KP24CA-B (5kW). Higher power ratings allow these components to suppress larger transient events without degradation, making them suitable for applications with more severe electrical stress conditions.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL rating of 1 (Unlimited), meeting regulatory requirements equivalent to the original 3KP24C-B.

Q: What is the significance of the voltage breakdown minimum specification?

A: The voltage breakdown minimum (ranging from 25.27V to 26.81V across substitutes) defines the threshold at which the TVS diode begins conducting. All substitute parts maintain breakdown voltages within acceptable tolerance of the original 25.29V specification, ensuring consistent circuit protection behavior.

Q: Can the 15KPA24CAE3/TR13 be used in applications originally designed for the 3KP24C-B?

A: Yes. The 15KPA24CAE3/TR13 maintains the 24V voltage rating, -55°C to 175°C operating temperature range, and P600 axial package. The higher power dissipation (15kW) and peak pulse current (371A) provide enhanced protection without introducing compatibility issues.