A4BQ Series / Class L / Time Delay
Put the highest current-limitation at your service - Amp-trapĀ® 2000 A4BQ fuses are 20% more current limiting than any other Class L fuse on the market. When correctly coordinated, they bring a superior level of protection to service entrance equipment. Downstream circuit components have maximum protection against short circuit let-thru current. A4BQ's built-in, 4-second time delay characteristic (at 500% of rated current) accommodates harmless inrush currents with no nuisance opening.
Ferraz's A4BQ is the industry's most current-limiting Class L fuse!