5KP14C-B Equivalent & Substitute Parts

Part Overview

The 5KP14C-B is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 14V reverse standoff voltage, 24.36V maximum clamping voltage, and 5000W peak pulse power rating in a P600 axial through-hole package. The part is currently listed as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Substiute Parts

5KP14C-B

Littelfuse Inc.In Stock: 8155KP14C-B Datasheet

Current PartRFQ

5KP14CA

Littelfuse Inc.In Stock: 31835KP14CA Datasheet

DirectRFQ

5KP14CA-B

Littelfuse Inc.In Stock: 8915KP14CA-B Datasheet

DirectRFQ

SLD14-018-B

Littelfuse Inc.In Stock: 1145SLD14-018-B Datasheet

MFR RecommendedRFQ

5KP14CE3/TR13

Microchip TechnologyIn Stock: 10745KP14CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP14C-B is determined by the following critical parameters that must remain constant across all equivalent parts:

• Voltage - Reverse Standoff (Typ): 14V
• Bidirectional Channels: 1
• Type: Zener
• Power - Peak Pulse: 5000W (5kW)
• Mounting Type: Through Hole
• Package / Case: P600, Axial
• Operating Temperature Range: -55°C ~ 175°C (TJ)

Acceptable variations within substitution criteria include minor differences in voltage breakdown specifications (within the 14V class), clamping voltage (within typical TVS tolerance bands), and peak pulse current ratings, provided the maximum clamping voltage does not exceed system design limits. All substitute parts maintain identical mechanical form factor and thermal operating range.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts (5KP14CA, 5KP14CA-B, SLD14-018-B, and 5KP14CE3/TR13) are active products with ROHS3 compliance and identical thermal operating ranges. Selection among these alternatives depends on application-specific requirements and supply chain considerations.

The 5KP14CA and 5KP14CA-B are direct Littelfuse equivalents with 23.2V maximum clamping voltage and 219.8A peak pulse current. These parts provide the lowest clamping voltage among available options and are suitable for applications requiring tighter voltage regulation.

The SLD14-018-B is a Littelfuse automotive-grade alternative qualified to AEC-Q101, appropriate for automotive and mission-critical applications requiring enhanced reliability documentation and traceability.

The 5KP14CE3/TR13 is a Microchip Technology alternative with 25.8V maximum clamping voltage and 194A peak pulse current. This part accommodates applications with higher transient voltage tolerance and is available in Tape & Reel packaging for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can 5KP14CA be used as a direct replacement for 5KP14C-B?

A: Yes. Both parts share identical reverse standoff voltage (14V), power rating (5000W), operating temperature range (-55°C to 175°C), and P600 axial through-hole package. The 5KP14CA is an active product and electrically compatible.

Q: What is the difference between 5KP14CA and 5KP14CA-B?

A: These parts are electrically identical. The primary difference is packaging: 5KP14CA is supplied in Cut Tape (CT) format, while 5KP14CA-B is supplied in Bulk. Selection depends on procurement and assembly requirements.

Q: When should SLD14-018-B be selected over standard 5KP14CA variants?

A: SLD14-018-B is qualified to AEC-Q101 automotive standards and carries automotive-grade reliability documentation. Select this part for automotive applications, safety-critical systems, or when enhanced qualification and traceability are contractual requirements.

Q: Is 5KP14CE3/TR13 from Microchip Technology compatible with the original Littelfuse design?

A: Yes. The Microchip part maintains all critical electrical parameters: 14V reverse standoff voltage, 5000W power rating, and identical thermal range. The 25.8V clamping voltage is within acceptable TVS tolerance bands for 14V class devices. Mechanical compatibility is confirmed through identical P600 axial package specification.

Q: What are the implications of different clamping voltages among substitute parts?

A: The 5KP14CA variants clamp at 23.2V, while 5KP14CE3/TR13 clamps at 25.8V. Both remain within acceptable operating margins for 14V standoff class TVS diodes. Applications with strict voltage regulation requirements should verify that the selected clamping voltage does not exceed downstream component ratings.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed (5KP14CA, 5KP14CA-B, SLD14-018-B, and 5KP14CE3/TR13) are ROHS3 compliant and suitable for applications requiring environmental compliance.