Fuse Amp-Trap® 600V 1800A Time-Delay Class L A4BY Series

The Amp-Trap® A4BY fuse is a UL/CSA listed Class L power fuse designed for protecting service entrance equipment, feeder circuits, circuit breakers, load centers, panelboards, switchboards, and metering centers. This current-limiting fuse features a 4-second minimum time-delay at 500% rating, enabling it to pass normal current surges and coordinate effectively with ground fault relays. It is suitable for continuous current applications up to its ampere rating and is a reliable choice for electrical distributors and switchgear suppliers requiring robust protection solutions.

Specifications

• Voltage Rating: 600 VAC, 300 VDC
• Amperage Rating: 1800 A
• Interrupting Rating: 200 kA
• Fuse Class: Class L
• Connection: Blade
• Mounting Type: Bolted
• Dimensions (L x W x H): 10.75 in x 3.5 in x 3.5 in
• Product Weight: 8.46 lbs
• Insulation Material: GMG (Glass Melamine)
• Manufacturer Part Number: A4BY1800

Features

• Current-limiting design with uniform characteristics across all ampere ratings
• 4-second time-delay at 500% rating to allow normal current surges
• Blade-stamped catalog numbers for permanent identification
• Glass melamine body and plated terminals provide superior reliability in harsh environments
• Unique dimensions prevent replacement by other fuse classes, ensuring proper fit and safety
• UL listed to standard 248-10 and CSA certified for industrial electrical applications
• Self-certified for DC applications per UL248 standards

Downloads & Links

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