Fastest operation under short circuit conditions let through currents are typically 20% lower, with a corresponding let through energy (clearing i2t) up to 40% lower than the next fastest class L fuseTime delay for high inrush loads such as motors and transformers without nuisance openingRejection style design prevents replacement errorsMost current limiting for lowest peak let through current, even at fault currents up to 300 kAPure silver links ensure lowest let through current and longer fuse lifeEasy 2 to 1 selectivity for prevention of nuisance shutdowns and "blackouts"High visibility orange label gives instant recognitionReduced inventory because A4BQ can replace all older types of class L fuses now in serviceMetal embossed date and catalog number for traceability and lasting identificationFiberglass body provides dimensional stability in harsh industrial settingsHigh grade silica filler ensures fast arc quenchingSilver plated copper contact