5KP24C-B Equivalent & Substitute Parts

Part Overview

The 5KP24C-B is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This component features a 24V reverse standoff voltage, 40.85V maximum clamping voltage, and 5000W peak pulse power rating in a through-hole P600 axial package. The part is currently obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement.

Substiute Parts

5KP24C-B

LittelfuseIn Stock: 7635KP24C-B Datasheet

Current PartRFQ

5KP24CA

Littelfuse Inc.In Stock: 44945KP24CA Datasheet

DirectRFQ

5KP24CA-B

LittelfuseIn Stock: 11795KP24CA-B Datasheet

DirectRFQ

SLD24-018

Littelfuse Inc.In Stock: 6079SLD24-018 Datasheet

MFR RecommendedRFQ

15KP24CA-TP

Micro Commercial CoIn Stock: 116015KP24CA-TP Datasheet

MFR RecommendedRFQ

5KP24CE3/TR13

Microchip TechnologyIn Stock: 8685KP24CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP24C-B is determined by the following critical parameters that must remain consistent across equivalent parts:

• Voltage - Reverse Standoff (Typ): 24V
• Bidirectional Channels: 1
• Mounting Type: Through Hole, Axial package
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Power - Peak Pulse: 5000W (5kW)
• Type: Zener, Bidirectional TVS Diode

Substitute parts are grouped into two categories based on these parameters:

Category A - Direct Littelfuse Equivalents (Same Manufacturer, Active Status)

• 5KP24CA
• 5KP24CA-B

Category B - Cross-Manufacturer Alternatives (Active Status, Automotive Grade)

• SLD24-018 (Littelfuse, Automotive AEC-Q101 qualified)
• 5KP24CE3/TR13 (Microchip Technology)
• 15KP24CA-TP (Micro Commercial Co, higher power rating)

All substitute parts maintain the 24V reverse standoff voltage, single bidirectional channel configuration, through-hole axial mounting, and -55°C to 175°C operating temperature range required for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: 5KP24CA or 5KP24CA-B

The 5KP24CA and 5KP24CA-B are direct Littelfuse equivalents with active product status. Both maintain identical electrical specifications to the obsolete 5KP24C-B across all critical parameters: 24V reverse standoff voltage, 5000W peak pulse power, P600 axial package, and -55°C to 175°C operating temperature. The 5KP24CA-B in bulk packaging provides cost efficiency for high-volume applications, while 5KP24CA in cut tape packaging supports standard component procurement workflows.

Secondary Recommendation: SLD24-018

The SLD24-018 is a Littelfuse automotive-grade TVS diode with AEC-Q101 qualification. This part is suitable for applications requiring automotive compliance and offers the highest inventory availability (6000 pcs). Electrical parameters remain equivalent to the main part across all critical specifications.

Alternative Recommendation: 5KP24CE3/TR13

The 5KP24CE3/TR13 from Microchip Technology provides cross-manufacturer compatibility with active product status. This part maintains the 24V reverse standoff voltage, 5000W peak pulse power, and P600 axial package configuration. The clamping voltage is slightly higher at 43V compared to the main part's 40.85V.

Higher Power Alternative: 15KP24CA-TP

The 15KP24CA-TP from Micro Commercial Co offers a 15000W peak pulse power rating, providing enhanced protection capability for applications requiring higher transient energy dissipation. This part uses an R-6 axial package instead of P600, requiring mechanical verification for board layout compatibility. The 24V reverse standoff voltage and operating temperature range remain consistent with the main part.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 5KP24C-B with 5KP24CA in my circuit?

A: Yes. The 5KP24CA maintains all critical electrical parameters: 24V reverse standoff voltage, 5000W peak pulse power, P600 axial through-hole package, and -55°C to 175°C operating temperature range. The part is a direct functional equivalent with active product status.

Q: What is the difference between 5KP24CA and 5KP24CA-B?

A: Both parts are electrically identical. The difference is packaging: 5KP24CA is supplied in cut tape (CT), while 5KP24CA-B is supplied in bulk. Select based on your procurement and assembly requirements.

Q: Why is the clamping voltage different between substitute parts?

A: Clamping voltage variation (38.9V to 43V) reflects different manufacturing processes and design approaches across manufacturers. All values remain within acceptable operating ranges for 24V protection applications. Verify clamping voltage specifications against your circuit protection requirements.

Q: Can I use 15KP24CA-TP as a direct replacement?

A: The 15KP24CA-TP is electrically compatible but uses an R-6 axial package instead of P600. Verify that the R-6 package dimensions fit your board layout and component spacing before substitution.

Q: Is SLD24-018 suitable for automotive applications?

A: Yes. The SLD24-018 carries automotive grade designation and AEC-Q101 qualification, making it suitable for automotive and harsh environment applications requiring enhanced reliability standards.

Q: What does ROHS3 Compliant mean for these parts?

A: ROHS3 Compliant indicates the parts meet Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All substitute parts listed maintain this compliance standard.

Q: Can I mix different substitute parts in the same design?

A: Yes, provided all parts meet your circuit protection specifications. However, maintaining a single part number per design simplifies procurement, inventory management, and supply chain consistency.