Providing protection for the high-voltage dc power grid in datacenters, telecom, and intelligent commercial buildings, the 487 Series is the company’s first fast-acting fuse from its 5 mm x 20 mm fuse family with both 420-Vac and 420-Vdc ratings. Its compact ceramic body is designed to ensure the best coordination between a power supply unit (PSU) and an electrical circuit breaker panel during short-circuit and over-current faults. The air circuit breaker trips before the fuse opens when the circuit is exposed to a short-circuit condition. When installed in a PSU, the 487 Series fuse opens faster than the circuit breaker, removes the problematic PSU from the branch circuit, and keeps the branch circuit live without cutoff. A datasheet is available at http://www.littelfuse.com/~/media/electronics/datasheets/fuses/littelfuse_fuse_487_datasheet.pdf.pdf
Littelfuse Inc.
Chicago, IL 60631
773-628-1000
http://www.littelfuse.com
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