Bourns MF-USML series are low ohmic PTC resettable fuses designed to provide overcurrent protection in a compact form factor. These fuses are ideal for thermal protection in lithium-ion and polymer battery packs, as well as applications like game consoles, PC motherboards, and USB port protection. They offer surface mount packaging for automated assembly, a small footprint, and ultra-low resistance. While currently available, Bourns recommends the enhanced MF-USML/X series for new designs. These resettable fuses are RoHS compliant and halogen-free, ensuring environmental responsibility. They are available in various models with different voltage, current, and resistance ratings to suit diverse application requirements.