Fastest operation under short circuit conditions: Let-thru currents are typically 20% lower, with a corresponding let-thru energy (clearing I2t) up to 40% lower than the next fastest Class L fuse Time-delay for high inrush loads such as motors and transformers, without nuisance opening 300kA interrupting rating - self-certified, UL witnessed tests Most current-limiting for lowest peak let-thru current; even at fault currents up to 300kA Recommended for Arc Flash energy reduction Pure silver links ensure lowest let-thru current and longer fuse life Easy 2-to-1 selectivity for prevention of nuisance shutdowns and “blackouts” Rejection-style design prevents replacement errors High-visibility orange label gives instant brand recognition Reduced inventory because A4BQ can replace all older types of Class L fuses now in-service Metal-embossed date and catalog number for traceability and lasting identification Fiberglass body provides dimensional stability in harsh industrial settings High-grade silica filler ensures fast arc quenching
