0LKN450.Z Equivalent & Substitute Parts

Part Overview

The 0LKN450.Z is a 450A 250 VAC cylindrical fuse link manufactured by Littelfuse Inc. under the POWR-GARD® LKN series. This component is classified as obsolete, requiring identification of active equivalent parts for continued system support and procurement.

The transition from fuse link to cartridge-style alternatives addresses supply chain continuity while maintaining electrical performance within specified parameters.

Substiute Parts

0LKN450.Z

Littelfuse Inc.In Stock: 8360LKN450.Z Datasheet

Current PartRFQ

KLNR450.X

Littelfuse Inc.In Stock: 943KLNR450.X Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The KLNR450.X qualifies as a functional substitute based on the following alignment of critical electrical parameters:

• Current Rating: Both parts rated at 450A
• Voltage Rating (AC): Both rated at 250 VAC
• Response Time: Both classified as Fast Blow
• Package / Case: Both feature cylindrical construction with blade terminals
• Approval Agencies: Both carry CE, CSA, and UL certifications
• RoHS Compliance: Both meet ROHS3 requirements

The primary distinction is the transition from fuse link to cartridge construction and the upgrade in breaking capacity. The KLNR450.X operates in RK1 class with 200kA AC breaking capacity, compared to the H class 10kA rating of the 0LKN450.Z.

Parameter Comparison

Engineering Selection Recommendations

The KLNR450.X is the designated manufacturer substitute for the obsolete 0LKN450.Z. Both components maintain identical current and AC voltage ratings with equivalent fast-blow response characteristics and full regulatory compliance across CE, CSA, and UL certifications.

The KLNR450.X offers enhanced breaking capacity (200kA AC versus 10kA) and adds DC voltage capability (125 VDC), providing expanded application flexibility. The cartridge construction represents the current product line standard within the POWR-GARD® family.

Dimensional variance in diameter (2.594" versus 2.874") requires verification of holder compatibility during integration. Axial length remains consistent at 10.374".

Frequently Asked Questions (FAQ)

Q: Can KLNR450.X directly replace 0LKN450.Z in existing installations?

A: Electrical compatibility is confirmed across current rating, AC voltage, response time, and approval certifications. Physical compatibility depends on holder specifications, as the diameter differs by 0.28 inches.

Q: What is the significance of the class change from H to RK1?

A: Class designation reflects breaking capacity and application scope. The RK1 classification of KLNR450.X indicates suitability for a broader range of industrial electrical systems compared to the H class of the obsolete part.

Q: Does KLNR450.X support DC applications?

A: Yes. KLNR450.X is rated for 125 VDC operation, whereas the 0LKN450.Z specification does not include DC voltage rating. This expands application possibilities in DC-powered systems.

Q: Are both parts RoHS compliant?

A: Both the 0LKN450.Z and KLNR450.X meet ROHS3 compliance requirements.

Q: What holder compatibility considerations apply?

A: The cylindrical blade terminal package is consistent between both parts. Verify that existing holders accommodate the 2.594" diameter of KLNR450.X, as this differs from the 2.874" diameter of the original part.