The ACK-300 is a time-delay fuse designed for lift trucks and battery charger applications, rated at 300 AMP with 80 VDC capacity. It features stud mounting with copper terminals and a 1.062-inch diameter. The fuse demonstrates specific response times: 100 seconds at 200%, 35 seconds at 300%, and 13 seconds at 500% overload. This one-time use fuse provides reliable protection for industrial equipment.