Fuse Amp-Trap 2000® 600V 4000A Time-Delay Class L A4BQ Series

The Fuse Amp-Trap 2000® A4BQ Series is a Class L time-delay fuse designed for superior current limiting and protection in electrical distribution systems. It is suitable for applications including mains, feeders, large motors, lighting, heating, general loads, and circuit breaker back-up. This fuse also supports DC-rated uses such as UPS DC links and battery disconnects. As a product from a trusted switchgear supplier, it enhances safety and reliability by minimizing short circuit let-thru currents and accommodating harmless inrush currents without nuisance openings.

Specifications

• Voltage Rating: 600 VAC / 500 VDC
• Amperage Rating: 4000 A
• Interrupt Rating: 200 kA
• Fuse Class: Class L
• Connection Type: Blade
• Mounting Type: Bolted
• Dimensions: 10.75 in (Length) x 5.75 in (Width) x 5.75 in (Height)
• Diameter: 5.75 inches
• Product Weight: 2.5 lbs
• Insulation Material: GMG
• Manufacturer Part Number: A4BQ4000
• Manufacturer: Mersen

Features

• 20% more current limiting than other Class L fuses for enhanced protection
• Built-in 4-second time-delay at 500% rated current to prevent nuisance openings due to harmless inrush currents
• Fastest operation under short circuit conditions with up to 40% lower let-thru energy (clearing I²t) than comparable Class L fuses
• 300kA interrupting rating with UL witnessed, self-certified testing
• 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 ensures fast arc quenching
• Easy 2-to-1 selectivity to prevent nuisance shutdowns and blackouts
• Reduced inventory needs by replacing older Class L fuse types

Downloads & Links

• Spec Sheet
• Curves 1
• Spec Sheet FR
• Drawings
• Curves 2
• Curves 3