Equivalent & Substitute Parts for 0LKN045.S

Part Overview

The 0LKN045.S is a 45A 250VAC cartridge fuse link from Littelfuse Inc.'s POWR-GARD® LKN series. This component is classified as obsolete, requiring identification of active equivalent parts for continued system support. The fast-blow response characteristic and H-class rating make this fuse suitable for electrical and industrial applications requiring reliable overcurrent protection at 250VAC.

Substiute Parts

0LKN045.S

Littelfuse Inc.In Stock: 10090LKN045.S Datasheet

Current PartRFQ

KLNR045.T

Littelfuse Inc.In Stock: 849KLNR045.T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The KLNR045.T serves as the manufacturer-recommended substitute for the obsolete 0LKN045.S. Substitution eligibility is determined by the following critical parameters:

• Current Rating: Both parts rated at 45A
• Voltage Rating - AC: Both rated at 250 VAC
• Physical Dimensions: Identical at 0.811" Dia x 3.000" L
• Mounting Type: Both require holder installation
• Response Time: Both classified as fast-blow
• Manufacturer: Both from Littelfuse Inc.
• Approval Agencies: Both carry CE, CSA, and UL certifications

The KLNR045.T represents an upgrade path, offering enhanced breaking capacity (200kA AC versus 10kA) and additional DC voltage rating capability (125 VDC), while maintaining full compatibility with existing 0LKN045.S installations.

Parameter Comparison

Engineering Selection Recommendations

The KLNR045.T is the active equivalent for the obsolete 0LKN045.S. Both components maintain identical current and AC voltage ratings, physical dimensions, and holder-based mounting requirements. The KLNR045.T carries active product status with full CE, CSA, and UL certification, ensuring continued compliance and availability for new designs and system replacements.

The transition from H-class to RK1-class fusing, combined with significantly increased breaking capacity (200kA AC versus 10kA), represents an enhancement in system protection capability. The addition of 125 VDC rating on the KLNR045.T provides expanded application flexibility without compromising AC circuit performance.

Frequently Asked Questions (FAQ)

Q: Can the KLNR045.T directly replace the 0LKN045.S in existing installations?

A: Yes. Both components share identical current rating (45A), AC voltage rating (250 VAC), physical dimensions (0.811" Dia x 3.000" L), and holder mounting requirements. The KLNR045.T installs in the same holder without modification.

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

A: Class designation indicates the fuse's breaking capacity and application category. The KLNR045.T's RK1 classification provides 200kA breaking capacity at rated voltage, compared to the 0LKN045.S H-class rating of 10kA. Both maintain fast-blow response characteristics suitable for electrical and industrial applications.

Q: Why does the KLNR045.T include a 125 VDC rating when the original part does not?

A: The KLNR045.T is rated for dual-voltage operation (250 VAC / 125 VDC), expanding its application range. This additional rating does not affect AC circuit performance and provides flexibility for mixed-voltage system designs.

Q: Are both parts RoHS compliant?

A: Yes. Both the 0LKN045.S and KLNR045.T are ROHS3 compliant, meeting environmental and material restriction requirements.

Q: What certifications apply to the KLNR045.T?

A: The KLNR045.T carries CE, CSA, and UL approvals, matching the certification profile of the obsolete 0LKN045.S and ensuring regulatory compliance across North American and European markets.