5KP26-B Equivalent & Substitute Parts

Part Overview

The 5KP26-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., 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 5KP26-B is classified as obsolete; equivalent and substitute parts are available from active product lines that maintain electrical and mechanical compatibility.

Substiute Parts

5KP26-B

Littelfuse Inc.In Stock: 9625KP26-B Datasheet

Current PartRFQ

5KP26A

Littelfuse Inc.In Stock: 46525KP26A Datasheet

DirectRFQ

5KP26A-B

Littelfuse Inc.In Stock: 11035KP26A-B Datasheet

DirectRFQ

SLD26U-017-B

Littelfuse Inc.In Stock: 792SLD26U-017-B Datasheet

MFR RecommendedRFQ

5KP26A-TP

Micro Commercial CoIn Stock: 12345KP26A-TP Datasheet

MFR RecommendedRFQ

5KP26E3/TR13

Microchip TechnologyIn Stock: 7385KP26E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP26-B is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 26V
• Voltage - Breakdown (Min): 27.36V minimum
• Power - Peak Pulse: 5000W (5kW)
• Mounting Type: Through Hole
• Package / Case: P600 or R-6 Axial
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Unidirectional Channels: 1
• Type: Zener

Substitute parts must maintain the 26V standoff voltage specification and 5000W power rating. Variations in clamping voltage (44.21V for the main part versus 42.1V or 46.6V for substitutes) remain within acceptable operating parameters for general-purpose transient suppression. Package variants (P600 versus R-6) are mechanically compatible for through-hole mounting applications. All substitute parts listed maintain ROHS3 compliance and unlimited moisture sensitivity rating.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance and unlimited moisture sensitivity rating, providing long-term availability and regulatory compliance advantages over the obsolete 5KP26-B.

For general-purpose applications requiring standard performance characteristics, 5KP26A, 5KP26A-B, and 5KP26E3/TR13 are direct electrical equivalents with P600 axial packaging. These parts maintain the 26V standoff voltage and 5000W power rating with clamping voltages within acceptable operating ranges.

For automotive-grade applications requiring AEC-Q101 qualification, SLD26U-017-B is the manufacturer-recommended substitute, offering the same electrical specifications with automotive-grade certification.

For applications with space constraints or alternative packaging requirements, 5KP26A-TP provides equivalent electrical performance in an R-6 axial package, supplied by Micro Commercial Co.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 5KP26-B with 5KP26A?

A: Yes. Both parts share identical reverse standoff voltage (26V), peak pulse power (5000W), operating temperature range (-55°C ~ 175°C), and through-hole P600 axial packaging. The 5KP26A is an active product with superior long-term availability.

Q: What is the difference between 5KP26A and 5KP26A-B?

A: Both parts are electrically identical with the same voltage and power specifications. The difference is packaging format: 5KP26A is supplied in Cut Tape (CT), while 5KP26A-B is supplied in Bulk. Selection depends on procurement and assembly requirements.

Q: Is SLD26U-017-B suitable for non-automotive applications?

A: Yes. SLD26U-017-B meets all electrical requirements for general-purpose transient suppression. The AEC-Q101 automotive qualification is an additional certification that does not restrict use in non-automotive applications.

Q: Can I use 5KP26A-TP as a direct replacement for 5KP26-B?

A: Yes, with package consideration. 5KP26A-TP maintains identical electrical specifications and through-hole mounting but uses an R-6 axial package instead of P600. Verify PCB footprint compatibility before substitution.

Q: Why do substitute parts have different clamping voltages?

A: Clamping voltage variations (42.1V to 46.6V) reflect manufacturing tolerances and design iterations within the 26V standoff voltage class. All values remain within acceptable operating parameters for general-purpose transient suppression applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring regulatory compliance and long-term storage capability.