Fuse Amp-Trap 2000® 600V 450A Time-Delay Class L A4BQ Series

The Fuse Amp-Trap 2000® A4BQ Series is a Class L time-delay fuse designed for superior electrical protection in mains feeders, large motors, lighting, heating, and general loads. It is suitable for use as circuit breaker back-up and DC rated applications including UPS DC links and battery disconnects. This fuse offers enhanced current limiting capabilities to protect downstream circuit components from short circuit let-thru current, making it a reliable choice for electrical distributors and switchgear suppliers seeking robust lighting and wire and cable protection solutions.

Specifications

• Amperage Rating: 450 A
• Voltage Rating: 600 V AC, 500 V DC
• Interrupt Rating: 200 kA
• Fuse Class: Class L
• Mounting Type: Bolted
• Connection: Blade
• Dimensions: Length 8.63 in, Width 2 in, Height 2 in, Diameter 2 in
• Insulation Material: GMG
• Product Weight: 2.44 lbs
• Manufacturer Part Number: A4BQ450
• 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 accommodate harmless inrush currents without nuisance opening
• Fastest operation under short circuit conditions with up to 40% lower let-thru energy compared to other 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
• Fiberglass body for dimensional stability in harsh industrial environments
• Metal-embossed date and catalog number for traceability and lasting identification
• Recommended for arc flash energy reduction
• Compatible with recommended fuse blocks P48F (100-800A) and P412F (801-1200A)

Downloads & Links

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