Ferraz Shawmut Amp-TrapĀ® Fast Acting Fuse, Current Limiting, Series: A4J, Rejection/Non-Rejection: Rejection, 20 A, 600 VAC/300 VDC, 200/100 kA Interrupt, Class: J Series, Ferrule Terminal, Holder Mount, Cylindrical Body, Polyester, 13/16 in Dia x 2-1/4 in L Body Size