ZCASE® 4P-5P Bolt-Down Fuse Holders Littelfuse ZCASE 4P-5P Bolt-Down Fuse Holders feature four-position and five-position automotive fuse blocks for ZCASE fuses. The fuse holders enable circuit-protected power distribution and accept ZCASE M8 and M10 fuses. The Littelfuse ZCASE 4P-5P Bolt-Down Fuse Holders provide a UL 94V-0-rated thermoplastic base and protective cover and have been tested to ISO 16750-3 shock and vibration standards. The FHZ16 four-position holder is rated up to 32V, and the FHZ15 five-position holder is rated up to 80V. The 4P-5P series operates within a -40°C to +85°C temperature range and is ideal for heavy trucks, medium-duty trucks, agricultural vehicles, and construction equipment applications.