First fast-acting fuse with 420VAC and DC ratings

Littelfuse introduces the 487 Series Fuse, the first fast-acting fuse from its 5mm x 20mm fuse family with both 420V AC and DC ratings. It protects telecom power supply units (PSU) and datacentre server power applications where a high-voltage DC interrupting rating is required. The fast-acting fuse comes with current ratings as high as 16A and in a 5mm x 20mm space-saving compact ceramic body. It ensures the best coordination between a PSU and an electrical circuit breaker panel during short-circuit and over-current faults. When installed in a PSU, the 487 Series fuse opens faster than the circuit breaker in an electrical panel, removes the problematic PSU from the branch circuit, and keeps it live without cut-off. The fuse's 420VAC characteristics make it ideal for high-energy applications like 3-phase power supplies, inverters and ballasts. Due to its 420VDC characteristics, the fuses are an optimal choice for a high-voltage DC power grid in datacentres, telecom, and intelligent commercial buildings, says the company.