MF-USMF175X-2 is a PTC resettable fuse from Bourns designed for fast-acting circuit protection in surface mount applications. This device features a hold current (Ihold) of 1.75 A and a trip current (Itrip) of 3.5 A at 23°C, with a maximum voltage rating of 6 V and maximum current rating of 40 A. The fuse exhibits a resistance of 0.020 O at 23°C and provides a maximum time to trip of 0.090 seconds, with typical tripped power dissipation of 1.00 W. Operating across a temperature range of -40°C to +85°C, the device is AEC-Q200 compliant, RoHS compliant, and halogen-free, making it suitable for automotive and consumer electronics. Common applications include USB port protection, HDMI source protection, mobile phones, digital cameras, and PC motherboards, where reliable overcurrent and short-circuit protection is essential.