Littelfuse 0LKN035.S Equivalent & Substitute Parts

Part Overview

The Littelfuse 0LKN035.S is a 35A 250VAC cartridge fuse link from the POWR-GARD® LKN series, designed for electrical and industrial applications requiring fast-blow protection. This part is classified as obsolete, making identification of compatible substitutes essential for system maintenance and component replacement. The fuse link requires a holder for installation and provides 10kA breaking capacity at rated voltage.

Substiute Parts

0LKN035.S

Littelfuse Inc.In Stock: 10890LKN035.S Datasheet

Current PartRFQ

KLNR035.T

LittelfuseIn Stock: 916KLNR035.T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0LKN035.S is determined by the following critical parameters:

• Current Rating: 35A (must match exactly)
• Voltage Rating - AC: 250 VAC (must match or exceed)
• Physical Dimensions: 0.811" Dia x 3.000" L (must match for holder compatibility)
• Fuse Type: Cartridge format (must be compatible with existing holder)
• Response Time: Fast Blow (must match application requirements)
• Mounting Type: Requires Holder (must be compatible with existing installation)

The KLNR035.T qualifies as a direct substitute based on matching current rating, AC voltage rating, physical dimensions, and fast-blow response time. While the substitute operates in a different fuse class (RK1 vs. H), both maintain the same electrical performance envelope for the specified 35A 250VAC application.

Parameter Comparison

Engineering Selection Recommendations

The KLNR035.T is the manufacturer-recommended substitute for the obsolete 0LKN035.S. Both parts maintain identical current and AC voltage ratings, physical dimensions, and fast-blow response characteristics, ensuring mechanical and electrical compatibility within existing holder installations.

The KLNR035.T offers enhanced breaking capacity (200kA AC versus 10kA) and adds DC voltage capability (125 VDC), providing superior performance margins without compromising the primary 35A 250VAC application. Both parts carry equivalent regulatory approvals (CE, CSA, UL) and maintain ROHS3 compliance.

The transition from Class H to Class RK1 reflects modern fuse classification standards while preserving the fast-blow protection profile required for the application. The active product status of KLNR035.T ensures long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can KLNR035.T be used as a direct replacement for 0LKN035.S in existing installations?

A: Yes. Both parts share identical current rating (35A), AC voltage rating (250VAC), physical dimensions (0.811" Dia x 3.000" L), and fast-blow response time. The KLNR035.T will function in any holder designed for the 0LKN035.S.

Q: What is the difference between Class H and Class RK1 fuses?

A: Class H and Class RK1 represent different fuse classification standards. The KLNR035.T (RK1) provides higher breaking capacity (200kA AC) compared to the 0LKN035.S (H, 10kA), offering enhanced protection margins while maintaining the same current and voltage ratings for this application.

Q: Does the KLNR035.T DC voltage rating affect AC-only applications?

A: No. The 125 VDC rating on KLNR035.T is an additional capability that does not impact AC-only operation. The part remains fully compatible with 250VAC applications.

Q: Are regulatory certifications equivalent between the two parts?

A: Yes. Both 0LKN035.S and KLNR035.T carry identical approval agencies (CE, CSA, UL) and maintain ROHS3 compliance, ensuring equivalent regulatory standing for electrical and industrial applications.

Q: Why is the 0LKN035.S obsolete?

A: The 0LKN035.S has been superseded by the KLNR035.T as part of Littelfuse's product line modernization. The KLNR035.T provides equivalent functionality with enhanced performance characteristics and active production status.