5KP26C-B Equivalent & Substitute Parts

Part Overview

The 5KP26C-B is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection applications. This component features a 26V reverse standoff voltage rating and 5000W peak pulse power handling capability in a through-hole P600 axial package. The part is currently obsolete, making identification of suitable equivalent and substitute components essential for ongoing system support and new design implementations.

Substiute Parts

5KP26C-B

LittelfuseIn Stock: 10945KP26C-B Datasheet

Current PartRFQ

5KP26CA

Diotec SemiconductorIn Stock: 42065KP26CA Datasheet

DirectRFQ

5KP26CA-B

Littelfuse Inc.In Stock: 9385KP26CA-B Datasheet

DirectRFQ

SLD26-018-B

Littelfuse Inc.In Stock: 787SLD26-018-B Datasheet

MFR RecommendedRFQ

5KP26CE3/TR13

Microchip TechnologyIn Stock: 9735KP26CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP26C-B is determined by the following critical parameters that must remain consistent across equivalent components:

• Voltage - Reverse Standoff (Typ): 26V
• Bidirectional Channels: 1
• Power - Peak Pulse: 5000W (5kW)
• Mounting Type: Through Hole
• Package / Case: P600, Axial
• Type: Zener

The substitute parts identified maintain these core electrical and mechanical specifications. Variations in voltage clamping characteristics and peak pulse current are permissible within the functional requirements of TVS diode applications, as these parameters reflect manufacturing process differences between suppliers while maintaining the same protection envelope.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts are active products with current manufacturing status, providing supply continuity for the obsolete 5KP26C-B. Selection among the available substitutes should be based on the following criteria:

5KP26CA-B (Littelfuse Inc., Bulk Packaging): Maintains Littelfuse manufacturing continuity with identical operating temperature range (-55°C ~ 175°C) and bulk packaging format. Voltage clamping of 42.1V is lower than the original 44.21V specification, providing tighter overvoltage protection margins.

5KP26CA (Diotec Semiconductor, Tape & Reel Packaging): Offers equivalent electrical performance to 5KP26CA-B with tape and reel packaging suitable for automated assembly. Operating temperature minimum is -50°C, which may be limiting for applications requiring full -55°C operation.

SLD26-018-B (Littelfuse Inc., Bulk Packaging, Automotive Grade): Manufacturer-recommended substitute with AEC-Q101 automotive qualification and identical electrical specifications to 5KP26CA-B. Suitable for applications requiring automotive-grade component certification.

5KP26CE3/TR13 (Microchip Technology, Tape & Reel Packaging): Provides the highest voltage clamping specification at 46.6V with tape and reel packaging. Appropriate for applications where higher clamping voltage is acceptable or beneficial.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 5KP26C-B with any of these substitute parts?

A: Yes, all identified substitute parts maintain the critical electrical and mechanical parameters required for functional equivalence: 26V reverse standoff voltage, 5000W peak pulse power rating, bidirectional Zener operation, and P600 axial through-hole package. Voltage clamping variations (42.1V to 46.6V) are within acceptable ranges for TVS diode applications and reflect normal manufacturing tolerances across suppliers.

Q: What is the difference between bulk and tape & reel packaging options?

A: Bulk packaging (5KP26CA-B, SLD26-018-B) is suitable for manual assembly and lower-volume applications. Tape & reel packaging (5KP26CA, 5KP26CE3/TR13) is designed for automated pick-and-place assembly equipment and higher-volume production environments. Electrical performance is identical; packaging selection depends on assembly methodology.

Q: Why does SLD26-018-B have automotive qualification when the original 5KP26C-B does not?

A: SLD26-018-B is designated as an automotive-grade component with AEC-Q101 qualification, making it suitable for automotive applications requiring certified components. The original 5KP26C-B lacks this designation. Selection of SLD26-018-B is appropriate only when automotive qualification is a system requirement.

Q: Are there operating temperature differences I should consider?

A: Most substitutes maintain the original -55°C to 175°C operating range. The 5KP26CA from Diotec Semiconductor has a minimum operating temperature of -50°C. For applications requiring full -55°C operation, select 5KP26CA-B, SLD26-018-B, or 5KP26CE3/TR13.

Q: How do voltage clamping differences affect circuit protection?

A: Voltage clamping determines the maximum voltage the TVS diode allows across the protected circuit during transient events. Lower clamping voltages (42.1V) provide tighter protection margins, while higher clamping voltages (46.6V) allow slightly higher transient peaks. Selection depends on the specific overvoltage tolerance of the protected circuitry.