The 477 series is the first and smallest 500 VAC and 400 VDC fuse under the class of 5 x 20 mm fuse family. It is designed for circuit protection in the area of high energy applications. With its DC and AC characteristics, the 477 series is well suited for high energy or power efficient applications and 3-phase power supplies protection respectively. In addition, it has interrupting rating (0.5 to 16 A) at 400 VDC which ensures the circuit is well protected under DC conditions.