A4BY400

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.

• 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

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