A4BY Class L


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 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.