Attributes . Fast-acting, low breaking capacity 5 mm x 20 mm ferrule fuse designed to IEC 60127-2 for overcurrent protection of electronic circuits. Install into a Bussmann Series fuse holder, block, or fuse clip, or purchase with available axial leads for thru-hole installation Eatons GDB fast-acting, low breaking capacity 5mm x 20mm ferrule fuses are designed to IEC 60127-2 for overcurrent protection of electronic circuits. Order in cartridge fuse format and install into a Bussmann Series fuse holder, block, or fuse . Names