Ferraz Shawmut - Mersen A4BQ500 600V 500A L TD FUSE

Amp-Trap 2000 A4BQ fuses are 20 percent 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 500percent of rated current) accommodates harmless inrush currents with no nuisance opening. Applications: Mains; Feeders; Large motors; Lighting, heating & general loads; Circuit breaker back-up - Features: Fastest operation under short circuit conditions: Let-thru currents are typically 20 percent 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; Optional mechanical TA indicator (100-6000A). Please contact factory for special trigger actuator - Approvals & Standards: UL listed to standard 248-10 File E2137; DC listed to UL standard 248 (100-2000A); CSA certified to standard C22.2 No. 248.10 (601-6000A); UL listed