A4J200 is a fast-acting Class J power fuse designed to deliver excellent current-limiting protection for industrial and commercial electrical systems. It is rated for 200 amperes at 600VAC or 300VDC, with an interrupting rating of 200kA AC and 100kA DC, providing high current limitation for low peak let-thru current. The fuse features a fiberglass body that ensures dimensional stability in harsh industrial environments, and its unique Class J dimensions prevent substitution by other fuse classes with lower voltage ratings or current-limiting capability. The A4J200 is UL listed to standard 248-8 and CSA certified to standard C22.2 no. 248.8, making it suitable for applications including capacitors, load centers, panelboards, switchboards, bus duct, feeder circuits, and general lighting and heating loads.