Bourns MF-USML series are low ohmic PTC resettable fuses designed to provide overcurrent protection in a compact form factor. These fuses offer surface mount packaging for automated assembly and are ideal for space-constrained applications like mobile phones and game consoles. They are RoHS compliant and halogen-free, ensuring environmental responsibility. The resettable nature of these fuses allows for automatic recovery after a fault, minimizing downtime and maintenance. They are commonly used in thermal protection for Li-ion and polymer battery packs, PC motherboards, and USB port protection.