The JK250-400U is a PTC (positive temperature coefficient) fuse with DIP (Dual Inline Package) RoHS (restriction of hazardous substances) from Yenji. It is a fast-acting self-resetting semiconductor protection fuse. It features a rated voltage of 250V AC, DC, and a rated current of 400mA. This fuse has a silicone-filled encapsulation that functions as a heat sink and enables flame-retardant, UL94V-0 rated protection. It has a high tolerance to thermal shock and ripple current. The fuse also provides high resistance to surges and overloads. This fuse complies with RoHS regulations and is an economical, reliable, and innovative solution for many applications.