Fuse Amp-Trap 2000® 600V 900A Time-Delay Class L A4BQ Series

The Fuse Amp-Trap 2000® A4BQ Series provides advanced current-limiting protection for electrical distribution systems, suitable for mains, feeders, large motors, lighting, heating, and general loads. Designed by Mersen, this Class L fuse offers a time-delay feature that accommodates harmless inrush currents, making it ideal for use in lighting solutions, wire and cable protection, and as a switchgear supplier component. Its robust construction and high interrupt rating ensure reliable performance in both AC and DC applications, including UPS DC links and battery disconnects.

Specifications

• Manufacturer: Mersen
• Manufacturer Part #: A4BQ900
• Fuse Class: Class L
• Voltage Rating: 600 VAC / 500 VDC
• Amperage Rating: 900 A
• Interrupt Rating: 200 kA
• Mounting Type: Bolted
• Connection: Blade
• Insulation Material: GMG
• Dimensions: Length 10.75 in, Width 2.5 in, Height 2.5 in, Diameter 2.5 in
• Product Weight: 4.29 lbs

Features

• 20% more current limiting than other Class L fuses, providing superior protection against short circuit let-thru current
• Built-in 4-second time-delay at 500% rated current to prevent nuisance opening during harmless inrush currents
• 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
• Reduced inventory needs by replacing all older types of Class L fuses currently in service
• Metal-embossed date and catalog number for traceability
• Fiberglass body ensures dimensional stability in harsh industrial environments
• High-grade silica filler for fast arc quenching

Downloads & Links

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• Spec Sheet
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• Spec Sheet FR
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