MF-USHT Multifuse® PTC Resettable Fuses Bourns MF-USHT Multifuse® PTC Resettable Fuses are primarily designed for automotive applications, including engine control modules. These fuses feature a small footprint (1210) with higher hold currents at elevated temperatures. Bourns MF-USHT fuses are ideal for high-density boards used in automotive circuitry, industrial, telecommunications, and consumer electronics.