9/21 LeaderBoard- Electrical Marketplace

Class L - 4-Second Time Delay - A4BY

Available from Mersen (formerly Ferraz Shawmut)

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

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