The 690/700V Protistor® fuse-links provide maximum flexibility in equipment design and ultimate protection for today's power conversion equipment. These aR ultra-fast acting square body fuse-links are available in different body sizes, each size having multiple worldwide acceptable mounting styles. They have been engineered to provide state-of-the-art protection for semiconductors: diodes, thyristors and IGBT devices. They are assembled with die-cut elements embedded in solidified sand, which helps control arcing characteristics for a lower I²t and high interrupting rating level. All contact surfaces are silver plated and all hardware is non-magnetic. Each fuse-link can be equipped with a low voltage trip-indicator which can operate a field mountable microswitch. Part No A070UD33TTI550 Rated Voltage UL 700VACIEC 690VAC Ampere Rating 550A Speed/Characteristic aR Fuse Size 33 Mounting Bolted Clearing I2t At Rated Voltage 155 kA²s Melting I2t 27 kA²s AC Max I.R./Breaking Capacity: I1 200 kA Design Details Standard Terminal Indication System Yes Indication System Type Striker Connection/Terminal Material Silver-Plated Brass Connection/Terminal Type Flush ends Dimensions 1.99'' (L) x 2.87'' (W) x 3.09'' (H) Body/Insulating Material Ceramic Product Weight 1.971 lb Power Dissipation at Rated Current Value 105 W