SF-0603S125-2 is a slow blow thin film chip fuse designed for overcurrent protection in compact electronic applications. It features a 1.25 A rated current with a typical resistance of 50 mO and opens within 5 seconds at 250% of rated current, providing reliable protection against transient overcurrent events. The fuse is housed in a miniature 1608 (EIA 0603) surface mount package with a typical I²t value of 0.057 A²s, rated for DC 50 V operation with a breaking capacity of 50 A. It is UL listed (UL 248-14), RoHS compliant, and halogen free, making it suitable for automated assembly and environmentally sensitive applications. Common applications include portable memory devices, LCD monitors, disk drives, cell phones, rechargeable battery packs, and industrial controllers where space constraints and reliable overcurrent protection are essential.