MF-USML200/12-2 is a low-ohmic polymer PTC resettable fuse designed for overcurrent protection in 12V applications. This surface mount device features a 1210 footprint with ultra-low resistance characteristics, providing a hold current of 2.0A and trip current of 4.0A at 23°C. The fuse exhibits a resistance range of 0.005 to 0.04 ohms and a maximum time to trip of 5 seconds, with a maximum tripped power dissipation of 1.0W. Operating across a temperature range of -40°C to +85°C, it is RoHS compliant and halogen-free, making it suitable for space-constrained mobile and consumer electronics applications where reliable circuit protection and quick response are essential.