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UL Class UL Class |
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Protection Type Protection Type |
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Breakthrough Current Breakthrough Current |
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Fuse Type Fuse Type |
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 | Cartridge |
Overall Length Overall Length |
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Overall Diameter Overall Diameter |
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Cartridge Fuse Style Cartridge Fuse Style |
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Blown Fuse Indicator Blown Fuse Indicator |
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Number of Elements Number of Elements |
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UL File Number UL File Number |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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Rejection-Style End Rejection-Style End |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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About Fuses
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UL Class J Fast-Acting Fuses for Tight Spaces
Ferrule Style
These fuses open circuits quickly when surges are detected. More compact than UL Class RK1 or RK5 fuses, they are suitable for tight spaces. Use with Fuse Blocks for UL Class J Fuses.
Breakthrough current, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.
For technical drawings and 3-D models, click on a part number.
Overall | Each | |||||||||
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| Current, A | Voltage | Breakthrough Current | Lg. | Dia. | No. of Elements | Cartridge Fuse Style | Specifications Met | 1-9 | 10-Up | |
Manufacturer Equivalent: A4J, JKS, JLS | ||||||||||
| 40 | 600V AC/175V DC | 10,000 A @ 175 V DC 200,000 A @ 600 V AC | 2 3/8" | 1 1/16" | 1 | Ferrule | UL Listed, CSA Certified | 00000000 | 000000 | 000000 |
| 50 | 600V AC/175V DC | 10,000 A @ 175 V DC 200,000 A @ 600 V AC | 2 3/8" | 1 1/16" | 1 | Ferrule | UL Listed, CSA Certified | 00000000 | 00000 | 00000 |
| 60 | 600V AC/175V DC | 10,000 A @ 175 V DC 200,000 A @ 600 V AC | 2 3/8" | 1 1/16" | 1 | Ferrule | UL Listed, CSA Certified | 00000000 | 00000 | 00000 |