Mersen: Circuit Protection Products

PUT THE HIGHEST CURRENT-LIMITATION... AT YOUR SERVICE. Amp-trap® 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.

Features

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
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 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

Applications

Mains, Feeders
Large Motors
Lighting, Heating & General Loads
Circuit Breaker Back-up
DC Rated: UPS DC Links, Battery Disconnects, Other DC Applications