9/21 LeaderBoard- Electrical Marketplace

Class L - 4-Second Time Delay - A4BY

Available from Mersen (formerly Ferraz Shawmut)

Product Details

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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