5KP11C-B Equivalent & Substitute Parts

Part Overview

The 5KP11C-B is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features an 11V reverse standoff voltage, 19.11V maximum clamping voltage, and 5000W peak pulse power rating in a through-hole P600 axial package. The part is currently classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

5KP11C-B

Littelfuse Inc.In Stock: 10075KP11C-B Datasheet

Current PartRFQ

5KP11CA

Littelfuse Inc.In Stock: 35105KP11CA Datasheet

DirectRFQ

5KP11CA-B

Littelfuse Inc.In Stock: 8635KP11CA-B Datasheet

DirectRFQ

SLD11-018-B

Littelfuse Inc.In Stock: 1249SLD11-018-B Datasheet

MFR RecommendedRFQ

5KP11CE3/TR13

Microchip TechnologyIn Stock: 6655KP11CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP11C-B is determined by the following critical parameters that must remain consistent across equivalent parts:

• Voltage - Reverse Standoff (Typ): 11V
• Bidirectional Channels: 1
• Power - Peak Pulse: 5000W (5kW)
• Mounting Type: Through Hole
• Package / Case: P600, Axial
• Operating Temperature Range: -55°C ~ 175°C (TJ)

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in clamping voltage (18.2V to 20.1V) and peak pulse current (249A to 280.2A) remain within acceptable tolerance ranges for the 11V protection class while meeting the same power dissipation requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Littelfuse Inc., Active Status)

The 5KP11CA and 5KP11CA-B are direct functional equivalents manufactured by Littelfuse Inc. and maintain active product status. Both parts share identical electrical specifications with the 5KP11C-B across all critical parameters. The 5KP11CA-B in bulk packaging provides the closest match to the original part's specifications and is recommended as the primary replacement for existing designs.

Automotive-Grade Alternative (SLD11-018-B)

The SLD11-018-B is a manufacturer-recommended substitute with AEC-Q101 automotive qualification. This part is suitable for applications requiring automotive-grade reliability and traceability. Electrical performance is equivalent to the 5KP11CA series.

Cross-Manufacturer Option (5KP11CE3/TR13)

The 5KP11CE3/TR13 from Microchip Technology is a manufacturer-recommended substitute offering active product status. This part maintains the same 11V protection class and 5000W power rating. The clamping voltage specification (20.1V maximum) represents a minor variation within acceptable tolerance for the 11V class, with correspondingly lower peak pulse current (249A versus 280.2A).

Frequently Asked Questions (FAQ)

Q: Can the 5KP11CA be used as a direct replacement for the 5KP11C-B?

A: Yes. The 5KP11CA maintains identical electrical specifications for reverse standoff voltage (11V), power rating (5000W), operating temperature range (-55°C to 175°C), and physical package (P600 axial through-hole). The primary difference is product status (active versus obsolete) and packaging format (cut tape versus original packaging).

Q: What is the difference between 5KP11CA and 5KP11CA-B?

A: Both parts are electrically identical. The difference is packaging: 5KP11CA is supplied in cut tape format, while 5KP11CA-B is supplied in bulk. Selection depends on procurement and assembly requirements.

Q: Is the SLD11-018-B suitable for non-automotive applications?

A: Yes. The SLD11-018-B meets all electrical and mechanical requirements for general-purpose applications. The automotive qualification (AEC-Q101) represents an additional quality assurance level and does not restrict use in non-automotive designs.

Q: Why does the 5KP11CE3/TR13 have a different clamping voltage specification?

A: The 5KP11CE3/TR13 maintains the same 11V reverse standoff voltage and 5000W power rating as the 5KP11C-B. The clamping voltage variation (20.1V maximum versus 19.11V) reflects normal manufacturing tolerance ranges within the 11V protection class and does not affect functional compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the environmental standards of the original 5KP11C-B.

Q: What packaging options are available for the substitute parts?

A: The 5KP11CA is available in cut tape format. The 5KP11CA-B is available in bulk. The SLD11-018-B is available in bulk. The 5KP11CE3/TR13 is available in tape and reel format. Selection depends on assembly process requirements and order quantities.