MF-USML400-2 is a low-ohmic PTC resettable fuse designed for automated surface mount assembly in space-constrained mobile applications. The device features a 1210 small footprint with low profile, maximum voltage rating of 6 V, and maximum current rating of 50 A. It exhibits ultra-low resistance of 0.0015 Ohms at 23°C, with a hold current of 4.00 A and trip current of 8.00 A, providing reliable overcurrent protection with a maximum time to trip of 20.00 seconds at 23°C. The fuse is RoHS compliant and halogen-free, with agency recognition (cUS), making it suitable for consumer electronics, portable devices, and other applications requiring compact, resettable overcurrent protection.