The RF1905-000 PTC Resettable Fuses 1812 (4.5*3.2mm) RoHS is a component manufactured by Littelfuse. It is a SMD component, primed for surface mounting and has a small surface area as it measures only 4.5x3.2mm. The component is designed to provide a reliable overcurrent protection for a range of applications such as consumer, automotive, lighting, telecommunications, etc. It is certified as RoHS compliant, which ensures its environmental safety. The RF1905-000 fuse has a 45m? ±25% max resistance and a 0.4A ±20% max current rating. The resettable fuse also features a thermal disconnect characteristics, allowing it to automatically reset after a power failure or an overcurrent situation. With this PTC fuse, users can be sure of its dependability and fast resetting after an overcurrent condition is resolved.