5KP11-B Equivalent & Substitute Parts

Part Overview

The 5KP11-B is a unidirectional 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 5KP11-B is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

5KP11-B

Littelfuse Inc.In Stock: 7645KP11-B Datasheet

Current PartRFQ

5KP11A

Littelfuse Inc.In Stock: 37495KP11A Datasheet

DirectRFQ

5KP11A-B

Littelfuse Inc.In Stock: 10115KP11A-B Datasheet

DirectRFQ

SLD11U-017-B

Littelfuse Inc.In Stock: 1078SLD11U-017-B Datasheet

MFR RecommendedRFQ

5KP11E3/TR13

Microchip TechnologyIn Stock: 6405KP11E3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5KP11-B is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 11V
• Unidirectional 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. Product status transitions from obsolete to active availability, and packaging options vary between Cut Tape, Bulk, and Tape & Reel formats to support different procurement and assembly requirements.

Parameter Comparison

Engineering Selection Recommendations

The 5KP11-B is obsolete and requires replacement with an active product. All listed substitute parts maintain identical electrical specifications for the 11V protection class and are ROHS3 compliant with MSL 1 rating.

5KP11A (Cut Tape) and 5KP11A-B (Bulk) are direct Littelfuse equivalents with active product status. These parts feature 18.2V clamping voltage and 280.2A peak pulse current, providing equivalent protection performance. Selection between Cut Tape and Bulk packaging depends on procurement volume and assembly process requirements.

SLD11U-017-B is a manufacturer-recommended substitute from Littelfuse with AEC-Q101 automotive qualification. This part is suitable for applications requiring automotive-grade components and offers the same electrical performance as 5KP11A variants.

5KP11E3/TR13 is a manufacturer-recommended substitute from Microchip Technology supplied in Tape & Reel format. This part features 20.1V clamping voltage and 249A peak pulse current, maintaining the 5000W power rating and 11V protection class. Microchip sourcing provides supply chain diversification.

Frequently Asked Questions (FAQ)

Q: Can 5KP11A directly replace 5KP11-B in existing designs?

A: Yes. Both parts maintain 11V reverse standoff voltage, 5000W peak pulse power, P600 axial through-hole package, and -55°C to 175°C operating temperature range. The 5KP11A is the active equivalent with improved availability.

Q: What is the difference between 5KP11A and 5KP11A-B?

A: Both parts are electrically identical. The difference is packaging format: 5KP11A is supplied in Cut Tape (CT) format for automated assembly, while 5KP11A-B is supplied in Bulk format for manual handling or alternative assembly processes.

Q: When should SLD11U-017-B be selected over 5KP11A?

A: SLD11U-017-B includes AEC-Q101 automotive qualification and is designated for automotive-grade applications. Select this part when automotive compliance is required.

Q: Is 5KP11E3/TR13 from Microchip a suitable substitute?

A: Yes. The 5KP11E3/TR13 maintains all critical parameters: 11V reverse standoff, 5000W peak pulse power, P600 axial package, and identical operating temperature range. The 20.1V clamping voltage and 249A peak pulse current remain within acceptable tolerance for the 11V protection class. This part provides supply chain flexibility through multi-source availability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original 5KP11-B specifications.

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

A: 5KP11A is available in Cut Tape (CT) format for automated pick-and-place assembly. 5KP11A-B and SLD11U-017-B are available in Bulk format. 5KP11E3/TR13 is available in Tape & Reel (TR) format. Select based on your assembly process requirements.