ATO® FHAC Series In-Line Fuse Holders Littelfuse ATO® FHAC Series In-Line Fuse Holders provide circuit protection for accessory lighting, air conditioners, panel displays, and blower motors. These fuse holders feature a built-in protective cover, offering an IP67-rated dust-tight enclosure, and they accept ATO blade fuses from 1A to 20A or up to 30A, depending on the model. The tin-plated copper alloy contacts are designed for corrosion resistance, and the heat-resistant thermoplastic fuse holder body has a UL 94V-0 flammability rating. Littelfuse ATO FHAC Series In-Line Fuse Holders offer a 32VDC maximum voltage rating and have both waterproof and standard versions.