The 30137 fuse block is used with common Mini-Fit automotive fuses. The 30137 is a two-wire, 5.2-mm blade-type fuse holder. It has one input and one protected output. It can accommodate Mini-Fit automotive-style bladed fuses, up to a maximum of 10 A. Fuse holders are commonly used to fuse an output of a battery or a charge source, as well as add protection to powered sensors. Moreover, fuse holders are ideal for creating multiple legs for power with different current requirements.