Keystone Electronics Corp. THM 2 in 1 Auto Blade Holder-Blue 3557-15

The 3557-15 is a vertical entry, through-hole mount automotive blade fuse holder designed for Littelfuse ATOF 287, Bussmann ATC, or equivalent fuses, including Low Profile Mini and Mini 297/997 series. It features brass contacts with tin-nickel plating and a nylon 4/6 insulator rated UL 94V-0, supporting a 30 A current rating at 500 V AC and operating temperatures from -50°C to +145°C. The blue color identifies it as rated for 15 A, though all color variants are UL rated for 30 A. It prevents solder wicking and maintains position during wave soldering, with polarized legs for correct orientation on the PCB.