Ferraz Shawmut - Mersen A4BY500 500 Amp 600 Volt Class L Time Delay Fuse

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. Features: 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 - Applications: Mains; Feeders; Circuit Breakers; Load centers; Panelboards; Switchboards; Metering Centers - Approvals & Standards: Mersen Self-Certification, UL Listed to Standard 248-10, File E2137; CSA Certified to Standard C22.2, No. 248.10 IEC 269-2-1; DC Tested to UL 248 limits (Mersen Self-Certified)