Fuse Amp-Trap® 600V 400A Time-Delay Class L A4BY Series

Fuse Amp-Trap® 600V 400A Time-Delay Class L A4BY Series - Electrical Fuse The Fuse Amp-Trap® 600V 400A Time-Delay Class L A4BY Series by Mersen is designed for reliable protection of service entrance equipment, feeder circuits, circuit breakers, load centers, panelboards, switchboards, and metering centers. This current-limiting fuse supports continuous current applications up to its ampere rating and features a 4-second minimum time delay at 500% rating to allow normal current surges and coordination with ground fault relays. It is suitable for electrical distributors and switchgear suppliers requiring robust wire and cable protection solutions. Specifications Manufacturer: Mersen Amperage Rating: 400 A Voltage Rating: 600 VAC Interrupt Rating: 200 kA Fuse Class: Class L Mounting Type: Bolted Connection: Blade Diameter: 2 inches Insulation Material: GMG Product Weight: 0.5 lb Manufacturer Part Number: A4BY400 Application: Mains Feeders, Circuit Breakers, Load Centers, Panelboards, Switchboards, Metering Centers Features 100% rated device for continuous current up to ampere rating 4-second minimum time delay at 500% rating for surge tolerance and relay coordination Current-limiting capability Unique dimensions prevent replacement by other fuse classes Blade stamped catalog numbers for permanent identification Glass melamine body and plated terminals for superior reliability in harsh environments UL listed to standard 248-10 and CSA certified Self-certified for DC applications Downloads & Links Spec Sheet Spec Sheet FR Curves 1 Curves 2 Drawings