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A4BY Class L

Count on the high interrupting rating of our most widely used class L fuse When it comes to protecting service entrance equipment, feeder circuits, and circuit breakers, A4BY fuses are 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.
• 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