Fuse Amp-Trap® 600V 1200A Time-Delay Class L A4BY Series

Fuse Amp-Trap® 600V 1200A Time-Delay Class L A4BY Series РElectrical Protection Fuse The Fuse Amp-Trap® 600V 1200A Time-Delay Class L A4BY Series by Mersen is designed for protecting service entrance equipment, feeder circuits, and circuit breakers. This current-limiting fuse is suitable for use in mains feeders, load centers, panelboards, switchboards, and metering centers. It features a 4-second minimum time delay at 500% rating, allowing it to tolerate normal current surges and coordinate effectively with ground fault relays. The fuse is UL/CSA listed and self-certified for DC applications, making it a reliable choice for electrical distributors and switchgear suppliers requiring robust wire and cable protection solutions. Specifications Amperage Rating: 1200 A Voltage Rating: 600 VAC, 300 VDC Interrupt Rating: 200 kA Fuse Class: Class L Diameter: 2.5 inches Mounting Type: Bolted Connection: Blade Insulation Material: GMG Product Weight: 0.5 lb Features 100% rated device for continuous currents up to ampere rating 4-second time delay at 500% rating for surge tolerance 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 Current-limiting characteristics with uniform performance across ampere ratings UL listed to standard 248-10 and CSA certified Self-certified for DC per UL248 Downloads & Links Spec Sheet Curves 1 Spec Sheet FR Drawings Curves 2