Monster Fuses > Littelfuse > CLASS RK Littelfuse - Class RK RK1 - 250V - Time Delay - LLNRK 1/10 - 30A 35 - 60A 70 - 110A 125 - 200A 225 - 400A 450 - 600A RK1 - 600V - Time Delay - LLSRK 1/10 - 30A 35 - 60A 70 - 110A 125 - 200A 225 - 400A 450 - 600A RK1 - 250V - Fast Acting - KLNR 1 - 600A RK1 - 600V - Fast Acting - KLSR 1 - 600A RK5 - 250V - Time Delay - FLNR 1/10 - 30A 35 - 60A 70 - 110A 125 - 200A 225 - 400A 450 - 600A RK5 - 600V - Time Delay - FLSR 1/10 - 30A 35 - 60A 70 - 110A 125 - 200A 225 - 400A 450 - 600A RK5 - 600V - Time Delay - IDSR (Indicating) 1/10 - 30A 35 - 60A 70 - 110A 125 - 200A 225 - 400A 450 - 600A