Fuse Amp-Trap® 600V 801A Time-Delay Class L A4BY Series

Fuse Amp-Trap® 600V 801A Time-Delay Class L A4BY Series The Fuse Amp-Trap® A4BY Series is a Class L, 600V time-delay fuse designed for protection of mains feeders, circuit breakers, load centers, panelboards, switchboards, and metering centers. This fuse is rated for continuous current up to 801 amperes and features a 4-second minimum time delay at 500% rating, allowing it to withstand normal current surges and coordinate effectively with ground fault relays. It is suitable for electrical distributors and switchgear suppliers requiring reliable current-limiting protection in industrial and commercial electrical installations. Specifications Amperage Rating: 801 A Voltage Rating: 600 VAC / 300 VDC Interrupt Rating: 200 kA Fuse Class: Class L Dimensions: Length 10.75 in, Width 2.5 in, Height 2.5 in Diameter: 2.5 inches Mounting Type: Bolted Connection Type: Blade Insulation Material: GMG Product Weight: 4.28 lbs Manufacturer: Mersen Manufacturer Part Number: A4BY801 Features 100% rated for continuous current up to ampere rating 4-second minimum time delay at 500% rating for surge tolerance and relay coordination Current-limiting design enhances protection of service entrance equipment and feeder circuits Glass melamine body with plated terminals for durability in harsh environments Unique dimensions prevent interchangeability with other fuse classes Blade stamped catalog numbers for permanent identification UL and CSA listed for safety and performance compliance Downloads & Links Spec Sheet Curves 1 Spec Sheet FR Drawings Curves 2