The 170M1320 is a high-speed square body DIN 43653 stud mount fuse designed for industrial power distribution and circuit protection at 690V AC (IEC) or 700V AC (UL). It is rated for 200A RMS at rated voltage with a total clearing I²t of 4200 A²sec and a prospective short-circuit breaking capacity of 200 kA RMS symmetrical. The fuse dissipates 28000 watts loss at rated current and operates with a power factor of 15%. It is designed and tested to IEC 60269 Part 4 and is UL Recognized, making it suitable for high-speed fault clearing in industrial electrical systems, power distribution networks, and equipment requiring rapid overcurrent protection with minimal let-through current.