Bourns MF-USML series resettable fuses provide overcurrent protection for circuits. These fuses are characterized by their small size, surface mount design, and ultra-low resistance, making them ideal for space-constrained applications like mobile phones, game consoles, and USB port protection. They are RoHS compliant and offer a reliable solution for thermal protection in battery packs and other electronic devices. While currently available, Bourns recommends the enhanced MF-USML/X series for new designs.