The high interrupting rating of the Amp-Trap A4BT
current-limiting fuses makes it suitable for protecting mains, feeders, and
general circuits. The 10-second time-delay at 500% of fuse rating is ideal for
large motors and other loads with high inrush currents. A4BT fuses can be
applied to normal loads up to its full ampere rating to allow 100% rating of
equipment.