Amp-Trap A4BY fuses have been the industry's favorite when it comes to protecting service entrance equipment, feeder circuits, and circuit breakers. The A4BY is a 100percent rated device and may be applied at continuous currents up to its ampere rating. A 4-second minimum time delay at 500percent rating allows the A4BY to pass normal current surges and to coordinate with ground fault relays.

Mersen Amp-Trap® Time Delay Fuse, Current Limiting Low Voltage, Series: A4BY, Non-Indicating, Rejection, 800 A, 600 VAC/300 VDC, 200/100 kA Interrupt, Class: L, 4 s at 500% Response, Blade Terminal, Bolted-On Mounting, Cylindrical Body, Dual Element, Fiber, 2-1/2 in Dia x 8-5/8 in L Body

• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Mersen_A4BY450_Specification_Sheet.pdf https://www.iesbuy.com//ASSETS/DOCUMENTS/ITEMS/EN/https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Mersen_A4BY450_Specification_Sheet.pdf

• Unique dimensions prevent replacement by other fuse classes
• Blade stamped catalog numbers for permanent identification
• Glass melamine body and-plated terminals provide superior reliability in harsh environments
• Uniform characteristics in all ampere ratings
• Silver-plated copper contact
• North American power fuses