Fuse Amp-Trap 2000® 600V 400A Time-Delay Class L A4BQ Series

Fuse Amp-Trap 2000® 600V 400A Time-Delay Class L A4BQ Series The Fuse Amp-Trap 2000® A4BQ Series is a Class L time-delay fuse designed for high-performance electrical protection in mains, feeders, large motors, lighting, heating, and general load applications. This fuse is suitable for use by electrical distributors and switchgear suppliers requiring reliable wire and cable protection with superior current-limiting capabilities. It also supports DC rated applications such as UPS DC links and battery disconnects. Specifications Voltage Rating: 600 VAC / 500 VDC Amperage Rating: 400 A Interrupt Rating: 200 kA Fuse Class: Class L Dimensions: Length 8.63 in, Width 2 in, Height 2 in, Diameter 2 in Mounting Type: Bolted Connection Type: Blade Insulation Material: GMG Product Weight: 2.6260 lbs Manufacturer Part Number: A4BQ400 Manufacturer: Mersen Features 20% more current-limiting than other Class L fuses, reducing short circuit let-thru current Built-in 4-second time-delay at 500% rated current to accommodate harmless inrush currents without nuisance opening Fastest operation under short circuit conditions with let-thru currents typically 20% lower and let-thru energy up to 40% lower than competing Class L fuses 300kA interrupting rating, self-certified with UL witnessed tests Pure silver links for lowest let-thru current and extended fuse life Rejection-style design to prevent replacement errors High-visibility orange label for instant brand recognition Metal-embossed date and catalog number for traceability Fiberglass body for dimensional stability in harsh industrial environments High-grade silica filler for fast arc quenching Easy 2-to-1 selectivity to prevent nuisance shutdowns and blackouts Reduced inventory requirements by replacing older Class L fuse types Downloads & Links Spec Sheet Drawings Spec Sheet FR Curves 1 Curves 2