LKN-40 Equivalent & Substitute Parts

Part Overview

The LKN-40 is a Super Lag Renewable Link fuse manufactured by Eaton - Bussmann Electrical Division, rated for 40/250 applications. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and component procurement. The Super Lag design provides time-delay characteristics suitable for inductive load protection in electrical distribution systems.

Substiute Parts

LKN-40

Eaton - Bussmann Electrical DivisionIn Stock: 687LKN-40 Datasheet

Current PartRFQ

LPN-RK-40SP

Eaton - Bussmann Electrical DivisionIn Stock: 1090LPN-RK-40SP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The LKN-40 has been superseded by the LPN-RK-40SP, manufactured by the same supplier, Eaton - Bussmann Electrical Division. Substitution is based on the following alignment criteria:

• Identical manufacturer and product category (Fuse)
• Matching electrical rating designation (40)
• Identical voltage class (250)
• Equivalent RoHS compliance status
• Same ECCN and HTSUS classifications
• Active product status of substitute ensures continued availability and support

The LPN-RK-40SP represents the manufacturer's direct replacement technology, transitioning from the renewable link design to a Low Peak Dual Element configuration while maintaining the same electrical protection parameters.

Parameter Comparison

Engineering Selection Recommendations

The LPN-RK-40SP is the manufacturer-designated replacement for the obsolete LKN-40. Both components maintain identical RoHS compliance and export classification, ensuring regulatory continuity. The substitute part carries active product status, guaranteeing manufacturer support, documentation availability, and supply chain reliability. Selection of the LPN-RK-40SP eliminates obsolescence risk while preserving electrical protection characteristics defined by the 40/250 rating specification.

Frequently Asked Questions (FAQ)

Q: Can the LPN-RK-40SP be used as a direct replacement for LKN-40? A: Yes. Both components share identical electrical ratings (40/250), manufacturer origin, and regulatory compliance status. The LPN-RK-40SP is the active product designated by Eaton - Bussmann Electrical Division to replace the obsolete LKN-40.

Q: What is the primary difference between these two fuse designs? A: The LKN-40 uses a renewable link design, while the LPN-RK-40SP employs a Low Peak Dual Element configuration. Both provide equivalent electrical protection at the 40/250 rating.

Q: Are there any compliance or certification differences? A: No. Both parts maintain identical RoHS compliance, ECCN classification (EAR99), and HTSUS coding (8536.10.0040).

Q: What packaging options are available for the substitute? A: The LPN-RK-40SP is supplied in Bulk packaging. Verify packaging requirements for your procurement process.

Q: Why is the LKN-40 listed as obsolete? A: Manufacturer product lifecycle decisions result in obsolescence. The LPN-RK-40SP represents the current technology generation for this electrical protection rating.