The BK/ABC-5-R is a fast-acting ceramic tube fuse designed for electrical circuit protection in AC and DC applications. It features a voltage rating of 250V AC (125V DC), with an interrupting capacity of 10,000 amps at both AC and DC ratings, and a typical DC cold resistance of 0.031 O. The fuse exhibits fast-acting characteristics with an opening time of 4 hours minimum at 100% of rated current, 60 minutes maximum at 135%, and 120 seconds maximum at 200% of rated current. With a typical pre-arc I²t value of 32.83 and a voltage drop of 0.22 mV at rated current, this fuse is suitable for industrial control circuits, power distribution systems, and equipment protection where reliable overcurrent protection is required.