Littelfuse 400-AMP 250-V AC FUSELINKS LIT LKN-400
The LKN Series are fuse links designed for Littelfuse RLN series renewable fuses. Traditionally, Class H fuses were used to provide low cost protection of general purpose feeder and branch circuits where available short-circuit currents did not exceed 10,000 amperes. However, generally increased levels of available fault current and the distinct possibility that renewable fuses may be improperly renewed, rendering them unsafe, have all but eliminated the use of these fuses in new applications. In addition, escalating labour costs and increasing automation, which makes downtime very expensive, have greatly reduced or eliminated the cost savings attributed to renewable fuses.
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BrandLittelfuseĀ®
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UPC079458320930
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Manufacturer Part NumberLKN400
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CountryUSA|Canada
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Rated Breaking Capacity10 kA
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Frequency Rating50/60 Hz
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Mounting TypeBlade
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Voltage Rating250 V AC
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Amperage Rating400 A
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SeriesLKN
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Dimensions8-5/8 in L x 2 in W
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Suitable For Use WithRLN Series Class H Single Element Renewable/Fast Acting Fuse
- Electrically connected to the end blade
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UNSPSC39121609
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Standards/ApprovalsUL Listed|CSA/CE Certified|RoHS Compliant
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The LKN Series are fuse links designed for Littelfuse RLN series renewable fuses. Traditionally, Class H fuses were used to provide low cost protection of general purpose feeder and branch circuits where available short-circuit currents did not exceed 10,000 amperes. However, generally increased levels of available fault current and the distinct possibility that renewable fuses may be improperly renewed, rendering them unsafe, have all but eliminated the use of these fuses in new applications. In addition, escalating labour costs and increasing automation, which makes downtime very expensive, have greatly reduced or eliminated the cost savings attributed to renewable fuses.
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LittelfuseĀ® POWR-GARDĀ® JLLN350 Current Limiting Fast Acting Fuse, 350 A, 300 V AC/125 V DC, 20/200 kA Interrupt, T Class, Cartridge Body
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Space saving Class T fuses are the most compact fuses available in ratings above 30 A - less than one-third the size of comparable Class R fuses. When rated in accordance with the NEC, Class T fuses provide Fast Acting overload and short circuit protection for non-inductive circuits and equipment. Used in inductive circuits, the ampere rating of Class T fuses must be increased to prevent opening on inrush currents. In such instances, Class T fuses may provide only short circuit protection.
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Space saving Class T fuses are the most compact fuses available in ratings above 30 A - less than one-third the size of comparable Class R fuses. When rated in accordance with the NEC, Class T fuses provide Fast Acting overload and short circuit protection for non-inductive circuits and equipment. Used in inductive circuits, the ampere rating of Class T fuses must be increased to prevent opening on inrush currents. In such instances, Class T fuses may provide only short circuit protection.

