The 125LET is a high-speed fuse designed for circuit protection in electrical panelboards, power distribution systems, and industrial control applications. It is rated for 125 A at 250 Vac/150 Vdc (UL standard) and features a pre-arcing time of 600.0 milliseconds with a clearing time at 240 Vac of 7500 milliseconds, providing reliable overcurrent protection. The fuse exhibits a power loss of 16.0 watts at rated current and is part of the LET series of Bussmann high-speed fuses. This fuse is commonly used in power panelboards, machinery disconnects, and combination starters where selective coordination and fast response to fault conditions are required.