Medium Voltage Fuse 390 A 4800V AC Not Rated Class R-Rated JCL-B Series Indicating Time Delay Body Style Bolt-On Nonrejection Interrupt Rating 50kA (Sym.) at 4800V AC 80kA (Asym.) at 4800V AC Fuse Size 19-1/4 in L x 3-1/3 in dia Length 19 1/4 in Diameter 3 1/3 in Equivalent Brand and Series Bussmann JCL-B Equivalent Series JCL-B Body Material Fiberglass Dual Element Standards UL Recognized (Guide MSSS2 File E96676)